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A good hostess bones are not missing - they can cook soup, besides very strong, If the bones of a long time to cook, and then the broth to cool, then turn out the jelly. By the way, jelly-concept not only cooking, but also chemical. Large group of colloidal systems called jellies in honor of the first of its representative and meat jelly.

The jelly is formed from the bones because the bones contains a special protein is gelatin. She, by the way, are sold in food stores in well cleaned. And technical, with impurities, gelatin is also sold in stores, but not in food, and in business, and is called a joiner or animal glue. It will cook from the bones. Food gelatine us, unfortunately, are unlikely to cook, cleaning too difficult.

A little raw bones, wrap it in a rag and break them with a hammer to get bone chips. These chips must be free from grease. Fat, as you know, dissolves in gasoline (remember that gasoline is flammable!). Pour bone chips gasoline, stir and leave for half an hour. Then drain the gasoline and repeatedly wash the bones with hot water.

Now prepare from the bones to the broth. You don't have to take the pan, fit well washed and empty tin can. Boil the bones in the water take a long time, and then have another boil down the broth on low heat until it becomes thick and viscous.

Now be patient. Put the broth in a dry and warm place and from time to time pogledajte at him. After a few days the broth will dry out and become brown joiner's glue. Although outwardly he seems dry, but contains a lot of bound water, which gelatin has absorbed during cooking. Then, when you decide to use glue and heat it in a water bath, part of the bound water will be allocated, and the glue will swell.

This glue can glue different wooden objects. But for our further experiments it is not sufficiently pure. It is better to put with ready gelatinous from a shop.

To prepare a solution of gelatin, put 10 g of powder in ¼ Cup cold water and let it as it should soak and swell; it will take at least an hour. Then heat the mixture to about 50°C. and, while stirring, wait until gelatin has dissolved completely. Part of the solution, pour a thin layer on a plastic film (not the glass from him then you gelatino out) and blot dry on the air. You'll have a thin gelatinous sheet from which to heighten the effect, you can cut the silhouette of a fish. Put this fish on blotting paper and gently breathe on it. The fish will start to squirm and roll up. Your breath moistens the paper with one hand, it increases in volume and tends to bend.

The swollen gelatin there is an interesting property: it allows you to get and preserve a beautiful ice patterns. Prepare the solution as in the previous experiment, gelatin hire two to three times less (or dilute remains of a solution of warm water). Still warm solution pour on a glass plate and immediately put it either in the cold (winter)or in the freezer in the coolest place. Water is yet to crystallize in the form of ice pattern as on the Windows in winter. If you leave a gelatin jelly in the cold for a few days, the ice will gradually evaporate. Let the gelatin slowly thaw and it will retain the imprint of the ice crystals.

Now we proceed to preparation of mineral fertilizers. Because the basis of most bone - phosphate (and dental bone - Apatite). The plant of mineral phosphate and Apatite prepared phosphate fertilizers. Let's try to turn the bones in a simple superphosphate.

Bones first, how should flame the bacteriological fire that burned down organic compounds-they will be the only obstacle. After calcinations will remain the calcium phosphate CA3(PO4)2 - phosphate. Several clean white pieces of calcined bones separate and grind into powder first with a hammer, and then grinding in a mortar. Mix 50 g of this powder with 3-5 g of chalk, put the mixture into a clean bottle and pour in 20 g of 70%sulfuric acid; again, when diluted to pour acid into the water! Acid to the mixture of bones and chalk must be added gradually, all the while vigorously stirring with a glass rod. The mixture is quickly heated, turns into a paste, and then in a dry, white powder-superphosphate CA(H2RO4)2. His education will take about an hour.

But why Phosphorit itself is rarely used as a fertilizer, and prefer him superphosphate? To understand this, let's do another experience.

Take two cups of water and place one slightly crushed bones (phosphate), and in another - already received superphosphate. The phosphorite powder will quickly settle to the bottom, and its initial volume will not change. Superphosphate same is subjected to hydrolysis, much increases in volume and settles immediately, but slowly, over several hours. This property helps superphosphate well distributed in the soil and how long to stay.

If you received a homemade fertilizer, it would be necessary, probably, it is reasonable to use it. Try to use it for the fertilizing of plants and watch them grow; do not forget to leave a control plant samples for comparison. And, you can feed another group of control plants ready fertilizers, factory production. I wonder how much they are better than homemade?

O. Holguín. "Experiments without explosions"
M., "Chemistry", 1986


Your comments:

2011-05-04 11:31:03
Dan, correct and so and so. Read here:
In the Soviet Union would not permit the publication of the book with gross spelling errors. This is not modern Russia. ;)
2011-05-04 01:39:23
actually not gelatin and gelatin
Your name (nick):
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