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Different diseases are trapped by biological organisms. But, it turns out, there are diseases in metals too. Let's get acquainted with the "tin plague". This happened in the 19th century in Russia. Somehow the authoritative commission checked the warehouses of the tsarist intendantry. The warehouses were not heated, and there, as in the street, there was a severe frost...

Homemade paints can be prepared at home. Take a solution of ferrous fumarate potassium (yellow blood salt) and ferric chloride solution and merge them into one vessel. You will get a blue liquid. The following reaction occurred...

Lead white - a white mineral paint based on lead. Previously, for writing pictures and icons, leaded white was used. Looking at the picture darkened by time, painted in oil paints, the owner sighs sorrowfully. Meanwhile, if you know the secrets of chemistry, this grief is easy to help. Moisten cotton wool in a 10-15 per cent solution of hydrogen peroxide and wipe the picture...

One can say with certainty that at least one chemical compound in a fairly pure form is available in every home. This is - table salt or as it is called by chemists - sodium chloride NaCl. It is difficult for us to imagine that in the past in many countries salt was an important source of replenishment of the treasury, it was an important subject of trade...

The chemistry of manufacturing modern matches has gone through interesting stages of its development. And it all began when the cutting of sparks when a stone struck a piece of pyrite FeS₂ and burning them with charred pieces of wood or plant fibers was almost the only way to get fire by a person...

The word corrosion comes from the Latin corrodere, which means to corrode, and corrosion is called spontaneous process of destruction of materials and products from them under the chemical influence of the environment. Stones, wood, plastics and other polymeric materials are also exposed to corrosion...