Magnetic drop. Fun chemistry experience at home

ENTERTAINING EXPERIENCES AT HOME
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Magnetic drop. Chemical experiments

Entertaining experiments in chemistry

Entertaining experiences at home / Chemistry experiments for children

Ask the children if liquids are magnetic. Everyone will answer in the negative - and they will be mistaken. You can easily prove it.

Put a crystal of ferric chloride on the glass. Ferric chloride greedily absorbs moisture from the air, the crystal quickly spreads and turns into a drop. Pry it with the loose end of a thick thread and bring a magnet to it. It will attract a drop. Ferric chloride solution has magnetic properties.

Author: Shkurko D.I.

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Random news from the Archive

About the benefits of chocolate 02.01.2004

British and Italian doctors conducted experiments, finding volunteers for whom was not at all difficult

A group of experimental subjects received one hundred grams of dark chocolate per day. The other group received the same amount of milk chocolate daily. The third washed down dark chocolate with a glass of milk An hour later, the amount of antioxidants in the blood of the experimental subjects from the first group increased significantly, while the amount of antioxidants in the representatives of the other two groups remained the same. The effect lasts four hours after eating a chocolate bar.

Antioxidants are useful substances found in many types of plant foods. They neutralize free radicals - aggressive fragments of molecules that occur when oxygen is consumed by our body. In addition, antioxidants reduce the likelihood of developing certain types of cancer, the appearance of dangerous blood clots, and serve as a preventive measure against heart attacks and strokes. As the Italian biochemist Mauro Serafini suggests. Milk prevents the body from absorbing the antioxidants in chocolate. Apparently, some of the milk proteins bind to antioxidants, blocking their absorption.

Serafini recommends avoiding dairy products for four hours after eating chocolate. Another recent study was able to show that hypertensive patients who ate 85 grams of dark chocolate daily for two weeks had a marked decrease in pressure - although not to normal levels. In those who received milk chocolate, the pressure did not change.

Canadian nutritionists consider dark chocolate to be an important source of zinc, which is deficient in many other foods. Australian doctors have shown that chocolate, chocolates, chocolate ice cream and cookies stimulate insulin production.

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