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We care about our children every day - cook porridge in the mornings and stroking clothes. But after 20 years they will not remember our homework, but the moments spent together.
website Assembled 16 experiments, which will tear away from adult affairs and get involved in children. For them, it is not necessary a lot of time and some special preparation, but the pleasure will be the sea. And then you can cook porridge. Together.
Solid liquid
You will need:
- starch
- plastic container
- food dye, board, hammer and nails for additional experiments
Stir water and starch in the container to creamy consistency. It turns out the "Nengeton" liquid. You can easily immerse your fingers into it, but if you hit the surface with a fist, you will feel that she is solid. Put the board on the surface of the liquid, and you easily make a nail, but it is worth drowning one of her corner in a liquid, like the board easily plunges on the bottom. If you wish, the "solid liquid" can be painted with food dyes.
Kinetic sand with your own hands
You will need:
- 4 h. L. Born alcohol
- 2 h. L. Stationery glue
- 1 tsp. Dye
- 100 g of sand for chinshill
- glass bowl
Pour all liquid components in a bowl, add the sand and mix thoroughly. Ready, you can create!
Pharaoh Snake
You will need:
- sand
- alcohol
- sugar
- match
- plate for "snake"
Put the sand into the plate with a slide, impregnate it with alcohol, and put a mixture of sugar and soda on top. Google. "Snake" grows instantly!
Electric train from wire and batteries
You will need:
- motor thick copper wire (the more wire, the longer the "tunnel")
- 1 Battery AA
- 2 round neodymium magnets suitable in diameter battery
- ordinary handle
Mock the wire handle to get a long spring. Secure the magnets on both ends of the battery. Run the "train". He will ride himself!
Swing from burning candle
You will need:
- candle
- fat needle
- lighter
- two glasses
- pliers
Cut the bottom end of the candle on a centimeter-one and a half to free the wick. Press the needle in the pliers and heat it with a lighter, and then write a candle in the middle. Put it on the edges of two cups and flow from both sides. Slightly swing, and then the candle starts rotating itself.
Rainbow paper towels
You will need:
- food colorings
- paper towels
- 5 glasses
Put the cups in a row and pour water in the 1st, 3rd and 5th. In the 1st and 5th, the red food dye, in the 3rd - yellow, in the 5th - blue. Fold 4 paper towels 4 times to get stripes, and then bend them in half. Insert into the ends into different cups - one between the 1st and 2nd glass, the second between the 2nd and 3rd, etc. in a couple of hours you can admire the rainbow!
Elephant Toothpaste
You need:
- 3/4 glasses of water
- 1 tsp. Manganese
- 1 tbsp. l. Liquid soap
- hydrogen peroxide
- glass flask.
- disposable gloves
Dissolve manganese in water, add liquid soap and break the mixture into the glass flask. Caution, but quickly pour the peroxide. Stormy foam splashed out of the flask up - a real toothpaste for an elephant!
Very slow ball
You will need:
- steel Ball
- transparent plastic ball container from two halves
- liquid medical
Put a steel ball into the container, pour honey and run the entire design from the slide. Hmm, what if you try with the gel for the shower?
Rings of smoke
You will need:
- plastic bottle (0.5 l)
- balloon
- aromatic chopstick
- lighter
- scissors
Cut the bottom of the plastic bottle and half the balloon. Put on a wide part of a bottle cut. Insert the wand in the bottle, cover your hole with your hand and wait until it is filled with smoke. Lack smoky rings, having tapping a finger on a stretched ball.
Self-taking balls
You will need:
- 4 Plastic bottles
- table vinegar
- 3 tbsp. l. soda
- 3 balls
- liquid food dyes
Cut the top at the plastic bottle, pull all the balls on the hole in turn and pour into each ball on the spoonful of soda through the resulting funnel. Pour the vinegar on the bottoms of the bottles, the back of the same food dye and carefully so that the soda does not wake up into the bottle, pull on the holes of the balls. It remains to raise them - the soda will fall out, reacts with vinegar, and the balls inflated themselves.
Cinema-soda rocket
You will need:
- plastic bottle (2 l)
- 3 simple pencil
- 2 tbsp. l. soda
- 200 ml of vinegar 9%
- wide Scotch
- wine plug
- paper towel
Make sure that the plug fits tightly to the neck of the bottle. Scotch and glue the pencils to the top of the bottle so that it can stand. Fill in a bottle of vinegar. Tightly wrap the soda into a paper towel and thoroughly tighten the tips. Go out into the street, lower the bundle with soda in a bottle and plug it with a plug, pressing one end of a convolution to the neck. Turn over the rocket, put on the ground and run! The takeoff should be observed from 15-20 meters, no less.
Interesting science Chemistry does not cease to surprise us with their interesting chemical reactions. Conduct some chemical experiments at home yourself. Do you know how to make a lot of foam from a cup of liquid? In fact, it is very simple and informative.
You can still try to make children.
To make a foam, you will need:
- manganese - Paul teaspoon,
- tablets hydroperite (20-30 pcs.),
- liquid soap - 30 ml.,
- hot water - 100 ml,
- columns and hammer.
Chemical experience for children - make foam at home
1. The first thing to do is to beat the hydroperite tablet hammer. If you do not use the hammer, then in the usual form they will dissolve for a long time. Then pour the resulting hot water powder (50 ml). Mix the solution. As a result, we obtain a 30% solution of hydrogen peroxide.
3. In another vessel, it is necessary to make a solution of potassium permanganate in water, that is, manganese. Magnantages need to take a bit, literally on the tip of a teaspoon and dissolve in warm water (50 ml). Mix well.
4. Now it is necessary to combine two liquids in the flask: hydrogen peroxide with soap + a solution of manganese.
You will see that many foam will instantly appear.
Such a process occurs because potassium permanangat, water and hydrogen peroxide interact with each other highlighting a lot of oxygen. And the soap fluid added to them does not give the oxygen to fly. Soap molecules envelop the separated oxygen forming a thick foam.
Many foam. Chemical experience for children at home - Video:
The same foam can be made of a solution of copper sulfate and hydroperite. But, compared with experience with mangartee, in a foam made of copper sulphate. A more pronounced smell.
In order to make such a foam you need:
- mix liquid soap and 30% hydrogen peroxide.
- Then mix ammonia with copper vitrios and get ammonium sulfate.
- After mixing two mixes and observe foaming.
This chemical reaction shows a spontaneous decomposition of hydrogen peroxide into water and oxygen. Using the actions of catalysts, decomposition occurs faster. In this case, the catalyst is obtained by an ammonia of copper, which is formed when ammonia is added to a solution of copper sulphate. Soap with water and hydrogen peroxide do not give the oxygen to "leave". Oxygen released in the form of bubbles is enveloped by soap molecules, and then rises. Bubbles form a foam, in contact with each other. Due to the small content of water, the foam is not settled for a long time.
To make the foam, you can add dyes more interesting.
She is - ( potassium permanganate) KMNO 4: represents dark purple crystals of manganese acid salts. Manganese is always sold in a pharmacy as an antiseptic antimicrobial agent (very strong oxidizing agent!). Many travelers take manganese with them for the prevention of drinking water in road conditions (enough to dissolve several crystallinists, as water is significantly cleaned).
Concentrated water solution permanganate potassium It is a very strong oxidant, it oxidizes organic compounds (plastic, wood, coloring substances). When heated crystals manganese (200-250c) it gradually turns into emerald-green dark crystals of mangartee - it is anhydrous salt - manganat Potassium K 2 MNO 4. At the same time, oxygen is rapidly isolated and manganese dioxide is formed (one of the main methods for producing oxygen in laboratory conditions).
Getting Manganese
A solution of mangartee Obtaining manganese Industry is associated with electrolysis of a concentrated solution of potassium hydroxide with a manganese anode. In the process of electrolysis, the anode material is gradually dissolved to form a familiar violet solution containing permanganate ions. At the cathode, hydrogen is released. Moderately soluble in water permanganate potassium (manganese) It is highlighted in the form of a precipitate. It would be tempting instead of the usual mangarteance to produce sodium permanangat, because sodium hydroxide is more accessible than potassium hydroxide. However, in these conditions, the sodium permanganate Namno 4 is not possible: unlike potassium permanganate KMNO 4, it is perfectly soluble in water (at 20 ° C, its solubility is 144 g per 100 g of water).
In a neutral or weakly alkaline medium, manganese (permanganate) goes into hydrated manganese oxide:
2kmno 4 + H 2 O + 3K 2 SO 3 → 2MNO 2 + 3K 2 SO 4 + 2Kon.
Permanganate potassium. Recovery in alkaline (2), neutral (3), acidic (4) medium In a neutral or low-alkaline medium, permanganate ion (manganese) is restored to manganese oxide (IV):
MNO 4 + 2N 2 O + 3E → MNO 2 + 4on -. Especially brightly manganese shows an oxidizing ability in an acidic environment:
MNO -4 + 8H + + 5e → Mn 2+ + 4N 2 O.
The acidified solid permanganate literally burns many organic compounds, turning them into carbon dioxide and water. This sometimes enjoy chemicals for washing laboratory dishes, strongly contaminated poorly washed by the remains of organic matter.
Solid potassium permanganate And its strong solutions can be dangerous. In case of poisoning with a concentrated solution of mangartee, a risk of mouth, esophagus and stomach occurs. If suddenly you swallowed such a solution, you must immediately wash the stomach with warm water with the addition of activated carbon. To do this, you can also use a solution containing in two liters of water of a half-table of a weak solution (H 2 O 2) and one glass of table vinegar. In this case, manganese ions go into less dangerous manganese cations, and the chemical reaction itself proceeds as follows:
2kmn0 4 + 5h 2 O 2 + 6CH 3 COOH → 2MN (CH 3 COO) 2 + 5O 2 + 2CH 3 Cook + 8H 2 O
Hydrogen peroxide
Hydrogen peroxide (peroxide) H 2 O 2. Delicate colorless liquid. Hydrogen peroxide is used in the same quality as a mangartan - as an antimicrobial agent. Hydrogen peroxide Does not put forward sunlight. The peroxide loses oxygen in the light and quickly disintegrates with the formation of water and atomic oxygen. Some additives, for example, solid manganese dioxide MNO 2, Potassium Permanganate decompose it so quickly that the peroxide "boils".
Hydrogen peroxide (or peroxide) In addition, in a concentrated solution hydrogen peroxide Availability manganese dioxide It becomes explosive. The action of the smallest particle manganese dioxide It can lead to instantaneous decomposition of peroxide to form oxygen and water. The reaction proceeds as follows:
2H 2 O 2 → 2H 2 O + O 2
Hydrogen peroxide can be found in a pharmacy in the form of 3%, 5%, 10% solutions, as well as under the names of "peroxide" or "hydroperite" in the form of white tablets. A concentrated solution (30%) of hydrogen peroxide is also applied, called "Pergerom". Pergerol apply in medical clinics. And at home you can use this solution of peroxide for economic purposes - for example, to remove stains on the tissues. But do not forget that the strongest oxidant. Finding on the skin, the concentrated peroxide solution (perhydro) causes strong burns. Especially take care of your eyes! Upon contact with alive tissues, hydrogen peroxide decomposes with oxygen release. Diluted hydrogen peroxide solutions are used as a hemostatic and disinfectant: the blood enzyme splits the peroxide to water and active oxygen, which reliably disinfects the wound. However, his action briefly, therefore, stopping bleeding, it is necessary to handle the wound in all the rules and impose a bandage. Solution of hydrogen peroxide It helps to cope with the infection that fell into the oral cavity or throat, at the same time get rid of the unpleasant odor.
Hydrogen peroxide together with coloring substance is widely used for hair painting.
It is necessary to store hydrogen peroxide in a bubble of dark glass and, if possible in a cool place.
Chemical experience - experiment - mix potassium permanganate and hydrogen peroxide. For this funny experience, you will need: 1. Potassium permanganate (mangartee) is a potassium mangartan, potassium salt of manganese acid. Chemical formula - KMNO4. It is dark purple, almost black crystals, when dissolved in water, forming brightly colored solid solid. 2. hydrogen peroxide (hydrogen peroxide), H2O2 - 30%. Caution, do not touch! 3. Dishwashing liquid, or any well-foam liquid (shampoo, liquid soap, foam for a bath TD). 4. Water, dyes. Reaction: When the interaction of a solution of manganese and hydrogen peroxide is distinguished - a lot of oxygen is distinguished, which, together with a dishwashing liquid, gives a lot of foam! Use gloves! Do not touch your hands! Conduct experience only in the presence of adults! More interesting experiments: rubber egg \u003d egg + vinegar https://www.youtube.com/watch?v\u003dT9qlusesXnc Fire Ball - how to make a "hazardous, fell fire" - https://www.youtube.com/watch?v \u003d Omjmmt9sezs egg + vinegar \u003d rubber egg - https://www.youtube.com/watch?v\u003dd0o7vwrhmue blast the aluminum jar from the inside httpset.com Caliya і Rowing water. For a given funny dosward, you are found: 1. Permanganate Kalіu (manganesevka) - MARANGANTOVIYALIY CALIY, CALIEVA SIL MARGANTERSHOYSHOY. Himіchna formula - KMNO4. I am sobody dark-fіoletі, khornі crystal, with Roshinenni in the water I am breeding the Yaskravo of the rockets of Rachin Rolls. 2. Peroxide water (lifting water), H2O2 - 30%. Ohrested, not ch_pati! 3. Rydina for Mitty Dishes, Abo Be Jacques Good Queen of Rydina (Shampoo, Ridka Milo, Pain for Bath Yitd). 4. Water, Barvniki. REACTER: When carefully, the reaches of manganesevі і і і авина - you can see a bagato kinya, I look like a rіdino for Mitty dishes Yes - Bagato pіney! Wick Mitches! Do not come with your hands! Conduct the doselki doselki in the ranks of Doroslich! Himіchna is crying - the Extension - we snatch the permanganate Kaliya і Perakіs Vadar. For Dadzenaga Patzeshnaga, I have a burterbіzza: Raeksysya: PERAKSYA SPAKATSY IS PERAKSU VADARODY - VYUTUCHETSA SHMAT KISLARDOVA, YAKI RATE ZKAKSYU FOR MOCSA WITH DEY SHMAT FEN! Okretkiўvice Palchatki! Do not Chapayz Hand! Truezitzka crying ў ў Jumpnasci Dairenoye! Chemicals Opti - Experiment - Mixes Kaliev Permanganate and hydrogen peroxide. Reaction: Interaction on the spread to Kaliev permanganate and hydrogen peroxide - Xie directly a lot of oxygen, cooled from the leaving for the Mien at the Congress Giving a lot of Fifume! Clear Rbquach! Do not stop! Drink Honey Chelyaddinka itself in deliberate on the luggie! music
Why do flowing fruit knives?!
Why do flowing fruit knives
If you add a solution of iron salt to some fruit juice (the solution of iron salt can be easily obtained at home, if it is lowered into a copper sulphate for half an hour, for example, a nail or a few buttons, clips), then the liquid will immediately darken. We will get a solution of weak ink. Fruits contain tubilic acidwhich with salt of iron forms ink. In order to obtain a solution of iron salt at home, lower the nail into a solution of copper mood and wait ten minutes. Then drain a greenish solution. The resulting solution of iron sulfate (FESO 4) can be used in reactions.
Tea also contains tannic acid. Salt of iron salt added to a weak solution of tea, change the color of tea on the black. It is for this that it is not recommended to brew tea in a metal kettle!
Chemical reactions with cook salt
Sometimes the table salt is specially iodined, i.e., sodium or potassium iodides add to it. This is done because the iodine is part of various enzymes in the body, and with its lack, the work of the thyroid gland deteriorates.
Copper sulfate solutions with salt salt (green) Detect the additive is simple enough. It is necessary to weld the starch kleuister: a quarter of a teaspoon starch diluted in a glass of cold water, heat to a boil, boil five minutes and cool. Claywner is significantly more sensitive to iodine than dry starch. Next, a third of a teaspoon of salt is dissolved in a teaspoon of water, several drops of acetic essence (or half a teaspoon of vinegar) are added to the resulting solution (or half a teaspoon of vinegar), half a teaspoon of hydrogen peroxide and after two or three minutes - a few drops of aleas. If the salt has been iodined, then hydrogen peroxide will displace a free iodine:
2i - + H 2 O 2 + 2SH 3 Soam → I 2 + 2N 2 O + 2SH 3 co -,
which paints starch in blue color. (The experience does not work if KCLO 3 was used to jedish the salt instead of Ki). Can be spent experience with copper vitriol and cook salt. Here will not happen one of the above reactions. But the reaction is beautiful ... When mixing a mud and salt, observe the formation of a beautiful green sodium tetrachlorine solution Na 2
Entertaining experiences with manganese:
Dissolve several potassium permanganate crystals in water and wait a while. You will notice that the raspberry of the solution (explained by the presence of permanganate ions in the solution) will gradually become more pale, and then completely disappear, on the walls of the vessel, a brown row of manganese oxide (IV) is formed:
4kmno 4 + 2n 2 o → 4mno 2 + 4Cone + 3o 2
The dishes in which you experienced experience is easy to clean with a solution of citric or oxalic acid. These substances restore the manganese to the degree of oxidation +2 and translate it into water-soluble complex compounds. In dark flasks, potassium permanganate solutions can be maintained for years. Many believe that potassium permanganate is well soluble in water. In fact, the solubility of this salt at room temperature (20 ° C) is only 6.4 g per 100 g of water. However, the solution has so intense color, which seems concentrated.
If you heat up to 200 0 C, then potassium permanangat will turn into a dark green potassium manganate (K 2 MNO 4). This distinguishes a large amount of pure oxygen, which can be collected and used for other chemical reactions. Especially quickly, the warman's solution is spoiled (disintegrating) in the presence of reducing agents. For example, the reducing agent is ethyl alcohol C 2 H 5 OH. Alcohol Magnantic Reaction flows as follows:
2Kmno 4 + 3C 2 H 5 Oh → 2KOH + 2MNO 2 + 3CH 3 CHO + 2H 2 O.
Washing agent of manganese:
In order to get a homemade "detergent", you need to mix manganese with acid. Of course, not with anyone. Some acids can oxidize themselves; In particular, if you take hydrochloric acid, a poisonous chlorine is separated from it:
2kmno 4 + 16HCl → 2mnCl 2 + 5Cl 2 + 2KCl + 8N 2 O.
So it is often obtained in laboratory conditions. Therefore, for our purposes, it is better to use dilute (approximately 5 percent) sulfuric acid. In extreme cases, it can be replaced by diluted with acetic acid - table vinegar. Take about 50 ml (a quarter of a glass) of the acid solution, add 1-2 g of potassium permanganate (at the knife tip) and thoroughly mix the wooden stick. Then we put it under the jet of the water and tie to the end a piece of the foam sponge. This "tassel" quickly, but neatly smearing the oxidative mixture along the contaminated segment of the shell. Soon the liquid will begin to change the color on the dark-cherry, and then on the brown. So, the oxidation reaction went to the full course. Here you need to make a few comments. It is necessary to work very carefully that the mixture does not hit hands and clothing; It would be nice to wear an adhesive apron. And do not hesitate, since the oxidative mixture is very eager and with the time "eats" even foam rubber. After use, the porolone "brush" needs to be immersed in a pre-prepared jar with water, rinse and throw it away. During such purification of the sink, an unpleasant smell may appear, published by the products of incomplete oxidation of organic contaminants on the faience and acetic acid itself, so the room should be ventilated. After 15-20 minutes, we melt the swinging mixture of the water jet. And although the sink appears in a terrible form - all in the brown stains, it is not necessary to worry: a potassium permanganate recovery product - MNO 2 manganese dioxide is easy to remove, restoring insoluble manganese (IV) to a manganese salt soluble in water.
But when potassium permanganate interacts with concentrated sulfuric acid, manganese oxide (VII) Mn 2 O 7 is an oily dark-green liquid formed. This is the only liquid metal oxide under normal conditions (TPL \u003d 5.9 ° C). It is very unstable and easily explodes with insignificant heating (tiled \u003d 55 ° C) or by shaking. Mn 2 O 7 is an even stronger oxidizing agent than KMNO 4. In contact with it, many organic substances are flammed, such as ethyl alcohol. This, by the way, one way to light the alcohol, without having matches!
Entertaining experiments with hydrogen peroxide
The hydrogen peroxide can be like an oxidizing agent (this property is widely known) and the reducing agent! In the latter case, it reacts with oxidizing substances:
H 2 O 2 -2E → 2N + + O 2. Manganese dioxide is just this substance. Such chemical reactions are called the "reducing decay of hydrogen peroxide". Instead of pharmacy peroxide, you can use hydroperite tablets - hydrogen peroxide compounds with urea composition CO (NH 2) 2 H 2 O 2. This is not a chemical compound, since there are no chemical bonds between urea and hydrogen peroxide molecules; H 2 O 2 molecules are included in long narrow channels in urea crystals and cannot leave from there until the substance is dissolved in water. Therefore, such compounds are called channel connections. One tablet of hydroperite corresponds to 15 ml (tablespoon) of the 3 percent solution H 2 O 2. To obtain a 1 percent solution of H 2 O 2, two hydroperite tablets and 100 ml of water are taking. Using manganese dioxide as a hydrogen peroxide oxidizing agent, one fineness needs to know. MNO 2 is a good catalyst for the reaction of the decomposition H 2 O 2 on water and oxygen:
2N 2 O 2 → 2N 2 O + O 2.
And if you simply treat the sink with a solution of H 2 O 2, it will instantly "boil", highlighting oxygen, and the brown tax will remain, because the catalyst during the reaction should not be consumed. To avoid catalytic decomposition H 2 O 2, you need an acidic environment. Here will also suit vinegar. I will strongly dilume the pharmacy peroxide, add a bit of vinegar and with this mixture with a rubber sink. A real miracle will happen: a dirty-brown surface sparkles white and will become like new. And the miracle happened in full compliance with the reaction
MNO 2 + H 2 O 2 + 2N + → MN 2+ + 2N 2 O + O 2.
It remains only to wash off a well-soluble salt manganese jet of water. In the same way, you can try to clean the contaminated aluminum frying pan: in the presence of strong oxidants on the surface of this metal, a solid protective film of the oxide is formed, which will protect it from dissolution in acid. But to clean the enameled products (pans, baths), not worth it: the acidic environment slowly destroys enamel. An aqueous solutions of organic acids can also be used to remove the MNO 2 climb: oxalous, lemon, wine, etc. And specially acidify them will not need - acids themselves create a sufficiently acidic medium in aqueous solution.
Entertaining experiences
"Gold" in the flask
Of course, gold is not real, but the experience is beautiful! For a chemical reaction, we will need a soluble salt salt (it will suit the acetic-influence (CH 3 COO) 2 PB-salt formed lead dissolution in acetic acid) and a salt of iodine (for example, potassium ki iodide). Cineral-eyed lead can be obtained at home, lowering a piece of lead in acetic acid. Potassium iodide is sometimes used to etch electronic circuit boards.
Potassium iodide and acetic acid in lead - two transparent liquids, in appearance do not differ from water.
Let's start the reaction: a solution of acetic acid solution of a leader of potassium is appropriate to the potassium iodide solution. Connecting two transparent liquids by observing the formation of a golden-yellow sediment - Iodide lead PBI 2, - spectacular! The reaction proceeds as follows:
(CH 3 COO) 2 PB + Ki → CH 3 Cook + PBI 2
Entertaining experiments with stationery glue
Stationery glue is nothing but a liquid with flower or its chemical name "Solikat sodium" Na 2 SiO 3 can also be said - this is a salt of silicon acid sodium. If you add an acetic acid solution to silicate glue, insoluble silicic acid falls into the precipitate - hydrated silicon oxide:
Na 2 SiO 3 + 2SH 3 Soam → 2ch 3 Coona + H 2 SiO 3.
The resulting precipitate H 2 SiO 3 can be dried in the oven and dissolve the diluted solution of water-soluble ink. As a result, the ink will be mounted on the surface of silicon oxide, and they will not be flushed. Such a phenomenon is called adsorption (from Lat. AD - "on" and Sorbeo - "absorb")
Another beautiful interesting experience with liquid glass. We will need copper cunic's CUSO 4, nickel sulphate NIS0 4, iron chloride FECL 3. We will make a chemical aquarium. In a high glass jar with silicate glue, diluted in half-water, at the same time, dilute aqueous solutions of nickel sulfate and iron chloride are poured out of two glasses. In the bank, silicate "algae" of yellow-green colors gradually grow up, which, intertwining, fall from top to bottom. Now add a solution of copper sulfate to the jar dropparts, set up aquarium "sea stars." Algae growth is the result of crystallization of hydroxides and silicates of iron, copper and nickel, which are formed as a result of exchange reactions.
Entertaining experiences with iodine
Add a few drops of hydrogen peroxide h 2 O 2 to iodine tincture and mix. After some time, a black plowing precipitate will be separated from the solution. it crystal iodine - poorly soluble in water substance. The iodine falls faster if the solution is cut a little hot water. The peroxide is needed in order to oxidize the kii potassium iodide contained in the tincture (it is added to increase the solubility of the iodine). With poor solubility of iodine in water, its other ability is also connected - extracted from water with liquids consisting of non-polar molecules (oil, gasoline, etc.). In a teaspoon of water, add a few drops of sunflower oil. We mix and see that the oil with water is not mixed. If there are two or three drops of iodine tincture there now and shake hard, then the oil layer will acquire a dark brown color, and the water layer is pale yellow, i.e. Most of the iodine will go into the oil.
Iodine is a very caustic substance. To make sure that a few drops of iodine tincture are placed on a metal surface. After some time, the liquid will deteriorate, and a stain remains on the metal surface. The metal reacted with iodine with the formation of salt - iodide. On this property of the iodine, one of the methods of applying inscriptions for metal is based.
Color entertaining experience with ammonia
Under the substance "Ammonia" we mean an aqueous solution of ammonia (ammonia alcohol). In fact, ammonia is gas, when dissolved in water, which forms a new class of chemical compounds - "bases". It is with the base that we will experiment. Spectacular experience can be done with a solution of ammonia (ammonia alcohol). Ammonia forms a painted compound with copper ions. Take a bronze or copper coin with dark raid and pour it with the ammonia alcohol. Immediately or after a few minutes, the solution is painted in blue. This is under the action of air oxygen copper formed a comprehensive connection - ammonia:
2CU + 8NH 3 + 3N 2 O + O 2 → 2 (OH)
Entertaining experiments: nimmerination
Lime harvesting is a chemical reaction between calcium oxide (SAO - forgery) and water. It proceeds as follows:
