In high school, they start chemistry no earlier than the 8th grade, since this science is too difficult for children to perceive. But you can prepare a student for the subject in a very simple and boring way - by organizing an experience in chemistry at home. Such mini-experiments will help to look at science from the other side, and showing “chemical tricks” at a children's holiday will significantly increase the degree of fun.
Fireproof bill
To carry out an incredibly effective, but simple trick, you will need:
- bill;
- water-alcohol solution with an alcohol content of about 50%;
- salt;
- tweezers or tweezers.
A pinch of salt must be added to the solution. Next, a bill is placed in the solution using tweezers. Those who conduct such an experiment in chemistry for the first time, it is better to take a bill of lesser value!
After the money is thoroughly soaked, it should be picked up again with tweezers and gently shake off excess liquid from the paper. Now you can set fire! The fire will pass through the entire bill, but not one edge will even be reddened. This is because the alcohol contained in the solution burns. In turn, the water that the paper is saturated with does not have time to evaporate.
Crystal eggs
Crystal growing is one of the popular hobbies that entertaining chemistry offers. Crystallization experiments are most often carried out on sugar, but sugar crystals no longer surprise anyone. We offer a new and unusual sight - crystals grown on eggs!
Crystal eggs can be obtained using:
- alum (sold at the pharmacy);
- PVA glue;
- dyes.
The crystals on the eggs will grow very quickly, in just a day. You must first wash the shell and dry it thoroughly. After that, the eggs are greased with glue and sprinkled with alum. Now they need to lie down for several hours to dry again.
Next, the dye must be dissolved in two glasses of plain water. The amount of dye can be chosen independently, in this case only the color intensity of the crystals depends on it. Eggs are placed in the dye for a day or a day. The longer the egg lies in the solution, the larger the crystals grow. It’s worth it to get ready-made crystal eggs - they are quite fragile.
Balloon on the bottle
How can a balloon be inflated without helium without physical effort? To do this, you can use ordinary baking soda and vinegar, which are in the closet in the kitchen of every mother. To conduct this experiment in chemistry, you will need:
- balloon;
- bottle;
- 3-4 teaspoons of soda;
- table vinegar.
Soda is poured directly into the ball using a funnel or spoon. Then they put it on a bottle with a little vinegar. As soon as the soda from the ball begins to wake up in a bottle, it begins to swell, as if from helium. This is due to the fact that vinegar reacts with soda, releasing carbon dioxide. The balloon is inflated thanks to gas in a few seconds, just catch it!
Multicolored layers in a bottle
The following experience in chemistry will clearly explain the concept of fluid density to a child. Useful for this:
- a quarter cup of sunflower oil;
- a quarter of a glass of water tinted in any bright color;
- a quarter cup of sugar syrup (for spectacular focus, it is also worth adding dye to it).
A child can predict in advance what happens when all these fluids are mixed. He will like the result - the syrup will settle down as the densest, the water will be in the middle, and the oil will stay on top. You can experiment with colors and liquids, making unthinkable compositions. For example, adding a different amount of sugar to the syrup will make it possible to obtain several liquids of different densities.
Laboratory experiments in chemistry can be quite boring. Such spectacular and at the same time simple tricks will help encourage a child to study science and simply entertain on a rainy day.