Reaction is called transformation of some chemicals into others. And the formula of their record by means of special symbols is also the equation of this reaction. There are various types of chemical interactions, but the principle of record of their formulas is identical.
It is required to you
- Periodic Table of D.I. Mendeleyev
Instruction
1. In the left member of equation initial substances which react register. They are also called reagents. Record is made by means of special symbols which it is designated each substance. Between substances-reagents the sign "plus" is put.
2. In the right member of equation the formula received one or several substances which are called reaction products registers. Between the left and right members of equation instead of an equal-sign the arrow which specifies the direction of reaction is put.
3. After record of formulas of reagents and products of reaction it is necessary to place reaction equation coefficients. It becomes in order that, according to the substance mass conservation law, the number of atoms of the same element in the left and right members of equation remained identical.
4. Correctly to place coefficients, it is necessary to consider each of the substances reacting. For this purpose one of elements undertakes and the amount of its atoms is compared at the left and on the right. If it different, then it is necessary to find number, multiple to the numbers designating amount of atoms of this substance in the left and right parts. Then this number is divided into amount of atoms of substance in the corresponding member of equation, and the coefficient for each of its parts turns out.
5. As the coefficient is put before a formula and belongs to all substances the entering it, following step there will be a comparison received data with amount of other substance driving in structure of a formula. It is carried out according to the same scheme as well as with the first element and taking into account already available coefficient for all formula.
6. After all elements of a formula are sorted, a final inspection of compliance of the left and right parts is carried out. Then the equation of reaction can be considered complete.