Many people consider that it is possible to face the chemical phenomena and reactions only in specialized laboratories or at school at chemistry lessons. However it not so, various processes meet continually, but very few people think of it.
Instruction
1. The chemical phenomena are such processes at which interaction of two different substances gives the third, new, substance. For example, at some chemical reactions there is a loss of a deposit, at others – formation of gas, allocation or absorption of heat, light. Chemical processes can be reversible and irreversible. For example, baking of pie – process irreversible, hydrolysis of salts (that is decomposition of salt by means of water) – reversible.
2. Chemical process can be observed in any beauty shop is a hair coloring paint, highlighting, a kolorirovaniye and so on. Medicine reacts with hair owing to what locks get a new color. At the heart of the processes permanent in the person, for example, of digestion, chemical reactions also lie.
3. The good hostess knows what harm does to the washing machine a scum and tries to fight against it. Scaling represents chemical process. The unpleasant smell in the fridge will disappear if to place granules of one of compounds of silicium in it (for example, silica gel). This substance absorbs molecules of various substances, without destroying them. Those who use this excellent property - use chemistry and its opportunities for the household benefit. Even in cookery it is possible to meet chemical processes – hissing when mixing soda and vinegar, fermentation of yeast, at addition to them of warm milk and sugar.
4. Washing with use of detergents, fabric bleaching, frying of meat and vegetables, souring of milk, fermentation of grape juice - also examples of chemical reactions in usual life. A large number of food products, interacting long time with oxygen, spoils, forming substances, harmful to people, with unpleasant smells.
5. Many still in the economic purposes use lime. And so its clearing – is undoubted, chemical process, as well as hardening of cement and alabaster, burning of different types of fuel, darkening of jewelry of silver. Corrosion of metal can be referred safely in the same category. Under the influence of moisture on metal rust – new substance appears over time. Such expert as the welder, daily in the work faces the chemical phenomena and processes – metal welding. Many in the childhood did small bombs, mixing carbide (welding material) with water, filling up all this in a plastic bottle and strongly shaking up – small explosion turned out. It is one more example of chemical reaction.
6. These are not all examples of chemical reactions and the phenomena in everyday life.