Home chemical experiments for children. Interesting chemical experiments that can be easily repeated at home

Such a complex but interesting science as chemistry always evokes an ambiguous reaction in schoolchildren. The children are interested in experiments, as a result of which substances of bright colors are obtained, gases are released or precipitation falls. But only a few of them like to write complex equations of chemical processes.

The importance of fun experiences

According to modern federal standards in mainstream schools introduced Such a subject of the program, as chemistry, also did not go unnoticed.

As part of the study of complex transformations of substances and solving practical problems, the young chemist sharpens his skills and abilities in practice. It is in the course of unusual experiences that the teacher forms an interest in the subject in his pupils. But in ordinary lessons, it is difficult for a teacher to find enough free time for non-standard experiments, and there is simply no time to spend for children.

To remedy this, additional elective and elective courses have been invented. By the way, many children who are fond of chemistry in grades 8-9 become doctors, pharmacists, scientists in the future, because in such classes a young chemist gets the opportunity to independently conduct experiments and draw conclusions from them.

What courses are related to fun chemistry experiences?

In the old days, chemistry for children was available only from the 8th grade. No special courses or extracurricular activities chemical orientation was not offered to children. In fact, there was simply no work with gifted children in chemistry, which had a negative impact on the attitude of schoolchildren to this discipline. The guys were afraid and did not understand complex chemical reactions, made mistakes in writing ionic equations.

In connection with the reform modern system the educational situation has changed. Now in educational institutions are also offered in the lower grades. The guys are happy to do the tasks that the teacher offers them, learn to draw conclusions.

Chemistry electives help high school students gain the skills to work with laboratory equipment, and invented for junior schoolchildren contain bright, revealing chemical experiments... For example, children study the properties of milk, get acquainted with the substances that are obtained when it sours.

Experiments related to water

Entertaining chemistry for children is interesting when, during the experiment, they see an unusual result: gas evolution, bright color, unusual sediment... A substance such as water is considered ideal for conducting a variety of entertaining chemical experiments for schoolchildren.

For example, chemistry for children of 7 years old can begin with an introduction to its properties. The teacher tells the children that most of our planet is covered with water. The teacher informs the pupils that there is more than 90 percent of it in a watermelon, and about 65-70% in a person. Telling students about how important water is for humans, you can offer them some interesting experiments. At the same time, it is worth emphasizing the "magic" of water in order to intrigue schoolchildren.

By the way, in this case, the standard set of chemistry for children does not imply any expensive equipment - it is quite possible to limit yourself to available devices and materials.

Ice Needle Experience

Let's give an example of such a simple and at the same time interesting experiment with water. This is an ice sculpture construction - "needles". The experiment will require:

water;
salt;
ice cubes.

The duration of the experiment is 2 hours, therefore, such an experiment cannot be performed in a regular lesson. First you need to pour water into the ice mold, put in freezer... After 1-2 hours, after the water turns into ice, the entertaining chemistry can continue. For the experiment, you will need 40-50 ready-made ice cubes.

First, children should arrange 18 cubes in the form of a square on the table, leaving in the center free place... Then they, after sprinkling with table salt, are carefully applied to each other, thus gluing together.

Gradually all the cubes are connected, and the result is a thick and long "needle" of ice. To make it, 2 teaspoons are enough. table salt and 50 small pieces of ice.

You can tint the water to make the ice sculptures multi-colored. And as a result of such a simple experience, chemistry for children of 9 years old becomes an understandable and fascinating science. You can experiment by gluing ice cubes together in a pyramid or diamond shape.

Experiment "Tornado"

This experience does not require special materials, reagents and tools. The guys will be able to make it in 10-15 minutes. For the experiment, we stock up:

plastic transparent bottle with a cap;
water;
dishwashing detergent;
sparkles.

The bottle should be filled 2/3 full with plain water. Then add 1-2 drops of dishwashing detergent to it. After 5-10 seconds, pour a couple of pinches of sparkles into the bottle. We tighten the lid tightly, turn the bottle upside down, holding the neck, and twist it clockwise. Then we stop and look at the resulting vortex. Until the moment the "tornado" starts working, you will have to spin the bottle 3-4 times.

Why does a "tornado" appear in an ordinary bottle?

When the child makes circular movements, a vortex appears, similar to a tornado. The rotation of water around the center is due to the action of centrifugal force. The teacher tells the children about how terrible tornadoes are in nature.

Such an experience is absolutely safe, but after it chemistry for children becomes a truly fabulous science. To make the experiment more vivid, you can use a dye, for example, potassium permanganate (potassium permanganate).

Experiment "Soap Bubbles"

Do you want to tell children what entertaining chemistry is? Programs for children do not allow the teacher to pay due attention to experiments in the classroom, there is simply no time for this. So, we will deal with this optionally.

Students elementary grades this experiment will bring a lot positive emotions, and it can be done in a few minutes. We will need:

liquid soap;
jar;
water;
thin wire.

In a jar, mix one part of liquid soap with six parts of water. We bend the end of a small piece of wire in the form of a ring, dip it into the soapy mixture, carefully pull it out and blow it out of the mold a beautiful soap bubble of our own making.

For this experiment, only wire that does not have a nylon layer is suitable. Otherwise, children will not be able to blow soap bubbles.

To make the children more interesting, you can add food coloring to the soap solution. You can arrange soap competitions between schoolchildren, then chemistry for children will become a real holiday. In this way, the teacher introduces the children to the concept of solutions, solubility and explains the reasons for the appearance of bubbles.

Entertaining experience "Water from plants"

To begin with, the teacher explains how important water is for cells in living organisms. It is with the help of it that nutrients are transported. The teacher notes that in the event of an insufficient amount of water in the body, all living things die.

The experiment will require:

spirit lamp;
test tubes;
green leaves;
test tube holder;
copper sulfate (2);
beaker.

This experiment will take 1.5-2 hours, but as a result, chemistry for children will be a manifestation of a miracle, a symbol of magic.

The green leaves are placed in a test tube and fixed in the holder. In the flame of an alcohol lamp, you need to heat the entire test tube 2-3 times, and then this is done only with the part where the green leaves are.

The beaker should be positioned so that the gaseous substances released in the test tube enter it. As soon as the heating is completed, add grains of white anhydrous copper sulfate to the drop of the liquid obtained inside the glass. Gradually White color disappears, and copper sulfate becomes blue or blue.

This experience delights children, because the color of substances changes before their eyes. At the end of the experiment, the teacher tells the children about such a property as hygroscopicity. It is due to its ability to absorb water vapor (moisture) that white copper sulfate changes its color to blue.

Experiment "Magic Wand"

This experiment is suitable for an introductory session of an elective chemistry course. First, you need to make a blank in the shape of a star and soak it in a solution of phenolphthalein (indicator).

In the course of the experiment itself, a star attached to a "magic wand" is first immersed in an alkali solution (for example, in a sodium hydroxide solution). Children see how, in a matter of seconds, her color changes and a bright crimson color appears. Next, the colored form is placed in an acid solution (for the experiment, it will be optimal to use a solution of hydrochloric acid), and the crimson color disappears - the asterisk becomes colorless again.

If the experiment is carried out for kids, during the experiment the teacher tells a "chemical tale". For example, the hero of a fairy tale may be an inquisitive mouse who wanted to find out why there are so many bright colors in a magical land. For pupils of grades 8-9, the teacher introduces the concept of "indicator" and notes what indicators can be used to determine the acidic environment, and what substances are needed to determine the alkaline environment of solutions.

Gin from a Bottle Experience

This experiment is demonstrated by the teacher himself, using a special fume hood. The experience is based on the specific properties of concentrated nitric acid. Unlike many acids, concentrated nitric is capable of chemically interacting with metals located after hydrogen (with the exception of platinum and gold).

Pour it into a test tube and add a piece of copper wire there. The test tube is heated under the hood, and the children observe the appearance of the “red gin” fumes.

For students in grades 8-9, the teacher writes an equation chemical reaction, highlights the signs of its course (discoloration, the appearance of gas). This experiment is not suitable for demonstration outside the walls of a school chemistry room. According to safety regulations, it involves the use of as vapors of nitric oxide ("brown gas") are dangerous for children.

Home experiments

In order to whet the interest of schoolchildren in chemistry, a home experiment can be proposed. For example, to conduct an experiment on growing crystals of table salt.

The child should prepare a saturated solution of table salt. Then place a thin twig in it, and, as the water evaporates from the solution, crystals of table salt will "grow" on the twig.

The solution jar must not be shaken or turned. And when after 2 weeks the crystals grow, the stick must be very carefully removed from the solution and dried. And then, if you wish, you can cover the product with a colorless varnish.

Conclusion

V school curriculum there is no more interesting subject than chemistry. But in order for children not to be afraid of this complex science, the teacher must devote sufficient time in his work to entertaining experiments and unusual experiments.

It is in practice that the skills that are formed in the course of such work will help stimulate interest in the subject. And in the lower grades, entertaining experiences are considered by the Federal State Educational Standard as an independent design and research activity.

Chemist is a very interesting and multifaceted profession, uniting under its wing many different specialists: scientists-chemists, chemists-technologists, chemists-analysts, petrochemists, chemistry teachers, pharmacists and many others. We decided to celebrate the upcoming Chemist's Day 2017 together with them, so we chose several interesting and impressive experiments in the area under consideration, which can be repeated even by those who are as far from the profession of a chemist as possible. The best chemical experiments at home - read, watch and memorize!

When is Chemist's Day

Before we begin to consider our chemical experiments, let us clarify that traditionally the Chemist's Day is celebrated on the territory of the post-Soviet states at the very end of spring, namely, on the last Sunday of May. This means that the date is not fixed: for example, in 2017, Chemist's Day is celebrated on May 28. And if you work in the chemical industry, or study a specialty from this area, or in some other way are directly related to chemistry on duty, then you have every right to join the celebration on this day.

Chemical experiments at home

And now we proceed to the main thing, and we begin to perform interesting chemical experiments: it is best to do this together with young children, who will definitely perceive what is happening as a magic trick. Moreover, we tried to find such chemical experiments, the reagents for which can be easily obtained in a pharmacy or a store.

Experiment # 1 - Chemical traffic light

Let's start with a very simple and beautiful experiment, which received this name by no means in vain, because the liquid participating in the experiment will change its color just to the colors of the traffic light - red, yellow and green.

You will need:

indigo carmine;
glucose;
caustic soda;
water;
2 transparent glass containers.

Don't be intimidated by the names of some of the ingredients - you can easily buy glucose tablets at the pharmacy, indigo carmine is sold in stores as a food coloring, and caustic soda can be found at the hardware store. It is better to take containers high, with a wide base and a narrower neck, for example, flasks, so that it is more convenient to shake them.

But what is interesting about chemical experiments - there is an explanation for everything:

By mixing glucose with caustic soda, i.e. sodium hydroxide, we obtained an alkaline glucose solution. Then, having mixed it with a solution of indigo carmine, we oxidize the liquid with oxygen, with which it was saturated during the transfusion from the flask - this is the reason for the appearance of the green color. Further, glucose begins to work as a reducing agent, gradually changing its color to yellow. But by shaking the flask, we saturate the liquid with oxygen again, allowing the chemical reaction to go through this circle again.

How interesting it looks live, you will get an idea from this short video:

Experience No. 2 - Universal indicator of acidity from cabbage

Children love interesting chemical experiments with colored liquids, it's no secret. But we, as adults, responsibly declare that such chemical experiments look very spectacular and curious. Therefore, we advise you to conduct another "color" experience at home - a demonstration amazing properties red cabbage. It, like many other vegetables and fruits, contains anthocyanins - natural indicator dyes that change color depending on the pH level - i.e. the degree of acidity of the environment. This property of cabbage will be useful to us in order to obtain further multi-colored solutions.

What we need:

1/4 red cabbage;
lemon juice;
baking soda solution;
vinegar;
sugar solution;
a drink of the "Sprite" type;
disinfectant;
bleach;
water;
8 flasks or glasses.

Many of the substances on this list are quite dangerous, so be careful when performing simple chemical experiments at home, wear gloves, if possible, protective goggles. And do not let children get too close - they may knock over the reagents or the final contents of the colored cones, even want to try them, which in no way should be allowed.

Getting started:

How do these chemical experiments explain the color changes?

The fact is that light falls on all objects that we see - and it contains all the colors of the rainbow. Moreover, each color in the ray of the spectrum has its own wavelength, and the molecules different shapes, in turn, reflect and absorb these waves. The wave that is reflected from the molecule is the one that we see, and this determines what color we perceive - after all, other waves are simply absorbed. And depending on what substance we add to the indicator, it begins to reflect only rays of a certain color. Nothing complicated!

A slightly different version of this chemical experiment, with fewer reagents, see the video:

Experience number 3 - Dancing jelly worms

We continue to do chemical experiments at home - and we will conduct the third experiment on all our favorite jelly candies in the form of worms. It will seem funny even to adults, and it will delight children altogether.

Take the following ingredients:

a handful of jelly worms;
vinegar essence;
ordinary water;
baking soda;
glasses - 2 pcs.

When choosing the right candies, opt for smooth, viscous worms, without sugar sprinkling. So that they are not heavy and move easier, cut each candy lengthwise into two halves. So, let's start interesting chemical experiments:

Make a solution in one glass warm water and 3 tablespoons of baking soda.
Place the worms in there and hold them there for about fifteen minutes.
Fill another deep glass with essence. Now you can slowly throw the jelly into the vinegar, watching them move up and down, which is kind of like a dance:

Why it happens?

It's simple: the baking soda in which the worms are soaked for a quarter of an hour is sodium bicarbonate, and the essence is an 80% acetic acid solution. When they react, they form water, carbon dioxide in the form of small bubbles and sodium salt of acetic acid. It is with carbon dioxide in the form of bubbles that the worm grows, rises up, and then falls when they burst. But the process is still going on, forcing the candy to rise on the formed bubbles and lower until it is completely finished.

And if you are seriously interested in chemistry, and want the Chemist's Day to become yours in the future professional holiday, then you will probably be curious to watch the following video, which details the typical everyday life of chemistry students and their fascinating educational and scientific activities:

Take it for yourself, tell your friends!

What is a chemical experience

First of all, you need to figure out what it is about. It is generally accepted that a chemical experiment is the manipulation of various organic and inorganic substances in order to establish their properties and reactions under various conditions. If it comes about experiments that are carried out with the aim of arousing in the child the desire to study the world, then they should be spectacular and simple at the same time. In addition, it is not recommended to select options that require special security measures.

Where to begin

First of all, you can tell your child that everything that surrounds us, including him own body, consists of various substances that interact. As a result, various phenomena can be observed: both those to which people have long been accustomed and do not pay attention to them, and very unusual. In this case, as an example, we can cite rust, which is a consequence of the oxidation of metals, or smoke from a fire, which is a gas released when various objects are burned. Next, you can start showing simple chemical experiments.

"Egg float"

A very interesting experiment can be shown using an egg and an aqueous solution of hydrochloric acid. To carry it out, you need to take a glass decanter or a wide glass and pour a 5% hydrochloric acid solution onto the bottom. Then you need to lower the egg into it and wait for a while.

Soon, bubbles of carbon dioxide will appear on the surface of the eggshell, due to the reaction of hydrochloric acid and calcium carbonate contained in the shell, and will lift the egg up. Having reached the surface, the gas bubbles will burst, and the "load" will again go to the bottom of the dish. The process of raising and diving eggs will continue until all the eggshells are dissolved in hydrochloric acid.

"Secret signs"

Interesting chemical experiments can be done with sulfuric acid. For example, with a cotton swab dipped in a 20% solution of sulfuric acid, they draw figures or letters on paper and wait for the liquid to dry. Then the sheet is ironed with a hot iron and black letters begin to appear. This experience will be even more effective if you hold the sheet over the flame of a candle, but this must be done very carefully, trying not to set fire to the paper.

"Fiery inscription"

Previous experience can be done in a different way. To do this, draw a contour of any figure or letter on a sheet of paper with a pencil and prepare a composition consisting of 20 g of KNO 3 dissolved in 15 ml hot water... Then, with a brush, soak the paper along the pencil lines so that there are no gaps. As soon as the audience is ready, and the sheet is dry, you need to bring the burning splinter to the inscription only at one point. A spark will immediately appear, which will "run" along the contour of the drawing until it reaches the end of the line.

Surely little viewers will be interested in why such an effect is achieved. Explain that when heated, potassium nitrate converts to another substance, potassium nitrite, and gives off oxygen to support combustion.

"Fireproof handkerchief"

Children will certainly be interested in the experience with the "fireproof" cloth. To demonstrate it, 10 g of silicate glue is dissolved in 100 ml of water and a piece of cloth or a handkerchief is moistened with the resulting liquid. Then it is wrung out and, using tweezers, is immersed in a container with acetone or gasoline. Immediately set fire to the fabric with a splinter and observe how the flame "devours" the scarf, but it remains intact.

"Blue bouquet"

Simple chemistry experiments can be very spectacular. We invite you to surprise the viewer by using paper flowers, the petals of which should be coated with glue made from natural starch. Then the bunch should be placed in a jar, drip a few drops of iodine alcohol tincture on the bottom and close the lid tightly. In a few minutes, a "miracle" will happen: the flowers will turn blue as iodine fumes will cause the starch to change color.

"Christmas decorations"

An original chemical experiment, as a result of which you will have beautiful decorations for a mini-Christmas tree, will turn out if you use a saturated solution (1:12) of potassium alum KAl (SO 4) 2 with the addition of copper sulfate CuSO 4 (1: 5).

First you need to make a frame of the figure out of wire, wrap it in white woolen threads and dip them into the premixed mixture. After a week or two, crystals will grow on the workpiece, which should be varnished so that they do not crumble.

"Volcanoes"

A very spectacular chemical experiment can be obtained with a plate, plasticine, baking soda, vinegar, red dye, and dishwashing liquid. Next, you need to proceed as follows:

divide a piece of plasticine into two parts;
roll one into a flat pancake, and mold a hollow cone from the second, at the top of which you need to leave a hole;
put the cone on a plasticine base and connect so that the "volcano" does not let water through;
put the structure on a tray;
pour "lava", consisting of 1 tbsp. l. baking soda and a few drops of liquid food coloring;
when the audience is ready, pour vinegar into the "mouth" and watch the violent reaction, during which carbon dioxide is released, and red foam flows out of the volcano.

As you can see, home chemical experiments can be very diverse, and all of them will interest not only children, but also adults.

Equipment and reagents: beakers, conical flask, metal stand, porcelain cup, crystallizer, knife, metal tray, test tube racks, test tubes, matches, tweezers, pipettes, handkerchief; water, dry fuel, 3 tablets of calcium gluconate, potassium carbonate, ammonia 25%, hydrochloric acid (conc.), phenolphthalein, metallic sodium, alcohol, stationery glue, ammonium dichromate, potassium dichromate, sulfuric acid, hydrogen peroxide, ferric chloride solutions ( III), KCNS, sodium fluoride.

Event progress

Chemistry is an interesting fascinating science. With the help of chemistry, our life becomes more interesting and varied.

Without chemistry, the whole world would become dim.
We drive, live and fly with chemistry,
V different points We inhabit the earth,
We clean, erase, remove stains,
We eat, sleep, and wear our hair.
We treat with chemistry, glue and sew
We live side by side with chemistry!

Though there are no miracles in the world.
Chemistry provides the answer.
“There are miracles in the world.
And, of course, there are a lot of them! "

Do not violate teachers' advice:

And even if you are not a coward,

Do not taste substances!

And you do not think to smell them.

Understand that these are not flowers!

Do not take anything with your hands

You will get burned, blisters!

Tea and delicious sandwich
They very much ask for your mouth.
Do not lie to yourself -
You can't eat and drink with us!
This, friend, is a chemical room,
There are no conditions for food.

In a flask - like marmalade,
Do not taste the substances!
Even poison smells sweet.

In the chemistry room

A lot of stuff:

Cones, test tubes,

Funnel and tripod.

And you don't need to pull

Waste pens

And then you spill it by accident

A valuable reagent!

"Pharaoh's Serpents"

Experience: put a tablet of dry fuel on a stand, put 3 tablets of calcium gluconate on it and set it on fire. A light gray mass is formed in the shape of a snake.

"Smoke without fire"

Experience: (The experiment must be carried out in a well-ventilated room or in a fume hood) pour potassium carbonate into a large flask (300-500 ml) so that it covers its bottom with an even layer, and carefully pour a 25% ammonia solution so that it moistens it ... Then slowly (be careful!) Pour a little concentrated hydrochloric acid into the flask (white "smoke" appears). What do we see? There is smoke, no fire. You see, in life there is no smoke without fire, but it does happen in chemistry.

"Flame on the water"

Experience: add phenolphthalein to a cup of water. Cut a piece of metallic sodium or lithium and gently put it in water. The metal floats on the surface, hydrogen ignites, and the resulting alkali makes the water turn crimson.

"Volcano"

Mighty nature is full of miracles,
And on Earth are subject to her alone
Shining stars, sunsets and sunrises
Wind gusts and surf ...
But we, now you will see for yourself
Sometimes we also own miracles.

Experience: pour ammonium dichromate on a tray, add alcohol, set it on fire.

"Fireproof scarf"

children's answers).

Our flying carpet flew away
We don't have self-assembly either,
There is a handkerchief, it will light up now,
But, believe me, it will not be able to burn.

Experience: moisten a handkerchief in a mixture of glue and water (silicate glue + water = 1: 1.5), dry slightly, then moisten with alcohol and set on fire.

"Orange, lemon, apple"

Experience: first, a glass with a solution of potassium dichromate, which is orange in color, is shown to the audience. Then, alkali is added, it turns into " Orange juice"To" lemon ". Then the opposite is done: from the "lemon juice" - "orange", for this add a little sulfuric acid, then add a little hydrogen peroxide solution and the "juice" became "apple".

"Wound healing"

There are three vials on the table: "iodine" (FeCl3 solution), "alcohol" (KCNS), " living water"(NaF).

Here's another fun for you
Who gives a hand to cut off?
It's a pity for the hand to be cut off,
Then a patient is needed for treatment!
We operate without pain.
The truth will be a lot of blood.
Each operation requires sterilization.
Help, assistant,
Give alcohol.
One moment! (gives alcohol- KCNS)

We will grease with alcohol abundantly.
Don't turn around, patient
Give me a scalpel, assistant!
("Scalpel" is a stick dipped in FeCl3)

Look straight in a trickle
Blood flows, not water.
But now I will dry my hand -
Not a trace of the cut!
"Iodine" - FeCl3 solution, "alcohol" - KCNS, "living water" - NaF.

"We are magicians"

Colored milk.

View document content
"Entertaining experiments in chemistry"

INTERESTING EXPERIENCES

in chemistry for children

Target: show interesting experiments in chemistry

Tasks:

motivate students to study chemistry;

to give students the first skills in handling chemical equipment and substances.

Event progress

Chemistry is an interesting fascinating science. With the help of chemistry, our life becomes more interesting and varied.

Without the chemistry of life, believe me, no,
Without chemistry, the whole world would become dim.
We drive, live and fly with chemistry,
We live in different parts of the Earth,
We clean, erase, remove stains,
We eat, sleep, and wear our hair.
We treat with chemistry, glue and sew
We live side by side with chemistry!

Though there are no miracles in the world.
Chemistry provides the answer.
“There are miracles in the world.
And, of course, there are a lot of them! "

But before you start the practical part of the event, listen to the comic safety rules.

Entering our chemical room,

Do not violate teachers' advice:

And even if you are not a coward,

Do not taste substances!

And you do not think to smell them.

Understand that these are not flowers!

Do not take anything with your hands

You will get burned, blisters!

Tea and delicious sandwich
They very much ask for your mouth.
Do not lie to yourself -
You can't eat and drink with us!
This, friend, is a chemical room,
There are no conditions for food.

Let it smell of vobla in the test tube,
In a flask - like marmalade,
Do not taste the substances!
Even poison smells sweet.

In the chemistry room

A lot of stuff:

Cones, test tubes,

Funnel and tripod.

And you don't need to pull

Waste pens

And then you spill it by accident

A valuable reagent!

"Pharaoh's Serpents"

In India, in Egypt, you can watch the dancing of snakes to the tune of spellcasters. Let us and we will try to make the "snakes" dance, only we will have fire as a spellcaster.

An experience: put a tablet of dry fuel on the stand, put 3 tablets of calcium gluconate on it and set it on fire. A light gray mass is formed in the shape of a snake.

"Smoke without fire"

The old adage says "There is no smoke without fire", let's check it out.

An experience: (The experiment must be carried out in a well-ventilated room or in a fume hood) Pour potassium carbonate into a large flask (300-500 ml) so that it covers its bottom with an even layer, and carefully add a 25% ammonia solution so that it moistens it. Then slowly (be careful!) Pour a little concentrated hydrochloric acid into the flask (white "smoke" appears). What do we see? There is smoke, no fire. You see, in life there is no smoke without fire, but it does happen in chemistry.

"Flame on the water"

Can you cut metal with a knife? Can he swim? Can water burn?

An experience: add phenolphthalein to a cup of water. Cut a piece from metallic sodium or lithium and carefully put it in water. The metal floats on the surface, hydrogen ignites, and the resulting alkali makes the water turn crimson.

"Volcano"

An experience: Sprinkle ammonium dichromate on a tray, add alcohol, set fire to it.

"Fireproof scarf"

Remember the magic items from fairy tales ( children's answers).

Our flying carpet flew away
We don't have self-assembly either,
There is a handkerchief, it will light up now,
But, believe me, it will not be able to burn.

An experience: moisten a handkerchief in a mixture of glue and water (silicate glue + water = 1: 1.5), dry slightly, then moisten with alcohol and set on fire.

"Orange, lemon, apple"

And now the next magic, from one juice we get another.

An experience: first, a glass with a solution of potassium dichromate, which is orange in color, is shown to the audience. Then, alkali is added, it turns "orange juice" into "lemon". Then the opposite is done: from "lemon juice" - "orange", for this a little sulfuric acid is added, then a little hydrogen peroxide solution is added and the "juice" has become "apple".

"Wound healing"

There are three bubbles on the table: "iodine" (FeCl solution 3 ), "alcohol" (KCNS), "Living water" (NaF).

Here's another fun for you
Who gives a hand to cut off?
It's a pity for the hand to be cut off,
Then a patient is needed for treatment! (the bravest boy is invited)
We operate without pain.
The truth will be a lot of blood.
Each operation requires sterilization.
Help, assistant,
Give alcohol.
One moment! (gives alcohol- KCNS) We will grease with alcohol abundantly.
Don't turn around, patient
Give me a scalpel, assistant!
("Scalpel" is a stick dipped in FeCl 3 )

Look straight in a trickle
Blood flows, not water.
But now I will dry my hand -
Not a trace of the cut!
"Iodine" - FeCl solution 3 , "Alcohol" - KCNS, "living water" - NaF.

"We are magicians"

And now you yourself will become wizards. We will now conduct an experiment.

Colored milk. I suggest you get blue milk. Does this happen in nature? No, but we will succeed, only you can't drink it. Merge copper sulfate and barium chloride together.

Dear Guys! So our miracles and entertaining experiments are over. We hope you like them! If you know chemistry, it will not be difficult for you to unravel the secrets of "miracles". Grow up and come to us to study this very interesting science- chemistry. Until next time!

Who loved at school laboratory works in chemistry? It is interesting, after all, it was to mix something with something and get a new substance. True, it did not always work out the way it was described in the textbook, but no one suffered about this, did they? The main thing is that something should happen, and we saw it right in front of us.

If in real life you are not a chemist and do not face much more difficult experiments every day at work, then these experiments, which can be done at home, will definitely amuse you, at least.

Lava lamp

For experience you need:
- Transparent bottle or vase
- Water
- Sunflower oil
- Food coloring
- Several effervescent tablets "Suprastin"

We mix water with food coloring, fill in sunflower oil... You do not need to stir, and you will not succeed. When a clear line between water and oil is visible, throw a couple of Suprastin tablets into the container. We look at the lava flows.

Since the density of the oil is lower than the density of water, it remains on the surface, with an effervescent tablet creating bubbles that carry water to the surface.

Elephant toothpaste

For experience you need:
- Bottle
- Small cup
- Water
- Dish detergent or liquid soap
- Hydrogen peroxide
- Fast acting nutritional yeast
- Food coloring

We mix liquid soap, hydrogen peroxide and food coloring in a bottle. In a separate cup, dilute the yeast with water and pour the resulting mixture into a bottle. We look at the eruption.

Yeast releases oxygen, which reacts with hydrogen and is pushed out. The soap suds create a dense mass erupting from the bottle.

Hot Ice

For experience you need:
- Tank for heating
- Transparent glass beaker
- Plate
- 200 g of baking soda
- 200 ml of acetic acid or 150 ml of its concentrate
- Crystallized salt

We mix acetic acid and soda in a saucepan, wait for the mixture to stop fizzling. Turn on the stove and evaporate excess moisture until an oily film appears on the surface. Pour the resulting solution into a clean container and cool to room temperature. Then we add a soda crystal and watch how the water “freezes” and the container becomes hot.

Heated and mixed vinegar and baking soda form sodium acetate, which, when melted, becomes an aqueous solution of sodium acetate. When salt is added to it, it begins to crystallize and generate heat.

Rainbow in milk

For experience you need:
- Milk
- Plate
- Liquid food coloring in several colors
- Cotton swab
- Detergent

Pour milk into a plate, drip with dyes in several places. We moisten a cotton swab in a detergent, put it in a bowl of milk. We look at the rainbow.

In the liquid part there is a suspension of fat droplets, which, in contact with the detergent, split and rush from the inserted stick in all directions. A regular circle is formed due to surface tension.

Smoke without fire

For experience you need:
- Hydroperite
- Analgin
- Mortar and pestle (can be replaced with ceramic cup and spoon)

The experiment is best done in a well-ventilated area.
We grind hydroperite tablets to powder, do the same with analgin. We mix the resulting powders, wait a little, see what happens.

During the reaction, hydrogen sulfide, water and oxygen are formed. This leads to partial hydrolysis with the elimination of methylamine, which interacts with hydrogen sulfide, the suspension of its small crystals of which resembles smoke.

Pharaoh snake

For experience you need:
- Calcium gluconate
- Dry fuel
- Matches or lighter

We put several tablets of calcium gluconate on dry fuel, set on fire. We look at the snakes.

Calcium gluconate decomposes when heated, which leads to an increase in the volume of the mixture.

Non-newtonian fluid

For experience you need:

- Mixing bowl
- 200 g corn starch
- 400 ml of water

Gradually add water to the starch and stir. Try to make the mixture smooth. Now try to roll a ball out of the resulting mass and hold it.

The so-called non-Newtonian liquid behaves like a solid during fast interaction, and like a liquid during slow interaction.