Question

What information do you get from the following equation:
${{\text{H}}_{2}}\text{(g)}+\text{C}{{\text{l}}_{2}}\text{(g)}\to 2\text{HCl(g)}$

Answer 1

A chemical equation is a symbolic representation of a chemical reaction in which chemical formulas and abbreviations are used to denote the species involved wherein the reactants are written on the left-hand side and products on the right-hand side of the arrow.

Complete answer:
The symbolic representation of chemical reaction which is used to study the entities and conditions involved is known as a chemical equation. It is written in the form of an equation where the substances that initiate the process and the products that are formed are placed on the left-hand side and right-hand side of the arrow respectively.
The substances present on the left-hand side are known as reactants and those present on the right-hand side are called products. The numbers placed before any element or compound in a chemical equation that represents its amount is called stoichiometric coefficients.
The physical state of the elements is written as small letters in curved brackets. The letter for solid, liquid, and gaseous states are (s), (l), and (g) respectively.
The information we can get from the given equation are as follows:
${{\text{H}}_{2}}\text{(g)}+\text{C}{{\text{l}}_{2}}\text{(g)}\to 2\text{HCl(g)}$
1 – Reactants involved in the reaction are hydrogen and chlorine gases.
2 – The product of the reaction is hydrogen chloride gas.
3 – It is a homogeneous reaction as all the elements and products are in the same phase (gas).
4 – 1 mole of each hydrogen and chloride gas reacts to produce 2 moles of hydrogen chloride gas.

Note:
The numbers written as a subscript to the elements are used to denote the exact chemical formula of the particular species while the numbers appearing before the symbols are known as stoichiometric coefficients that denote the number of moles of atom or molecule or ion participating in the reaction.