Chemistry Learning – How to Write Chemical Equations

1. Writing steps

(1) Writing – respect objective facts and the fixed composition of pure things

Write the chemical formulas of the reactants and products (valency rules check whether the chemical formulas are correct).

(2) Balance – embody the law of conservation of mass (atom conservation)

Balance the chemical equation, each on the left and right ends The number of atoms remains the same.

(3) Etc. – Explain that the generation of new substances and the conservation of mass are equal

Change the short line to an equal sign to reflect Chemical meaning of chemical equations.

(4) Note – external factors and actual forms of chemical reactions

Indicate reaction conditions and products state, the chemical equations must be standardized and complete.

2. Some methods of balancing chemical equations

(1) Least common multiple method

(2) Observation method

(3) Odd-numbered spouse method

(4) Undetermined coefficient method

First determine the coefficient of the most complex molecule as 1, then balance the relevant atoms for the basis, and finally determine the coefficient of the simple molecule , if there is a fractional coefficient, it needs to be transformed intointo an integer. If a chemical equation is not balanced, it is a wrong chemical equation.