Experiments with water

Published April 01, 2020

Experiments with water

Everyone knows that water is a chemical compound, and its chemical formula - H2O - is well known to everyone. Water consists of two elements - hydrogen and oxygen. Let's experiment with it, namely, try to decompose the water into its constituent parts and then create it again. This is not an easy task because water is a very stable compound...

Experiments with gases

Published October 10, 2020

Experiments with gases

Let's work with gases. Experiments with gases are somewhat more difficult to do than with liquids. Therefore, first of all, we will need plugs with holes and gas pipes. Slide a rubber or polyethylene flexible tube 30 centimeters long over the glass tube, and insert a short glass tube into the other end...

How to make a stearic candle from soap?

Published December 23, 2020

How to make a stearic candle from soap?

What is stearin and how to make a stearin candle from soap? To answer these questions, let's remember why soap washes. For this, its molecules have a special structure: a "head" and a long "tail", and the "head" tends to water, and the "tail", on the contrary, repels from the water... The hydrophobic tail is long hydrocarbon chains. One of them - the so-called stearin - can be obtained by taking laundry soap as a basis...

Chemical clock

Published February 23, 2021

Chemical clock

In experiments that are so similar to tricks, colorless solutions were painted in one or another color, and this happened immediately, as if by magic. Indeed, chemical reactions proceed very quickly and, as a rule, begin immediately after mixing the reagents. However, there are exceptions to this rule. The reaction mixture may remain colorless for a while, and then instantly turn color. Want - in five seconds, want - in ten; you yourself can set the "chemical clock" to the required time...

Experiments with silver

Published June 13, 2021

Experiments with silver

Silver nitrate solution is often used to determine hydrochloric acid or chlorides. Since silver nitrate is not easy to obtain, we can obtain a small amount by dissolving a piece of an old silver object (a silver coin, a piece of a spoon, jewelry, or chain). Silver objects, however, are not made of pure metal, but of alloys, which often contain copper as a second component. It gives the metal greater...

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