Question

What is chemical equation? Write any two examples of chemical equation.​

Answer 1

1 CH4 + O2 → CO2 + 2 H2O. Inspection of the last atom to be balanced (oxygen) shows that the right-hand side has four atoms, while the left-hand side has two. It can be balanced by putting a 2 before O2, giving the balanced equation: CH4 + 2 O2 → CO2 + 2 H2O.

Answer 2

Answer:

Chemical equations are symbolic representations of chemical reactions in which the reactants and the products are expressed in terms of their respective chemical formulae. They also make use of symbols to represent factors such as the direction of the reaction and the physical states of the reacting entities. Chemical equations were first formulated by the French chemist Jean Beguin in the year 1615.

Chemical reactions can be represented on paper with the help of chemical equations, an example for which is represented below (for the reaction between hydrogen gas and oxygen gas to form water).

2H2 + O2 → 2H2O

It can be observed in the example provided above that the reacting entities are written on the left-hand side whereas the products that are formed from the chemical reactions are written on the right-hand side of the chemical equation.It can also be observed that there are coefficients assigned to each of the symbols of the corresponding reactants and products. These coefficients of entities in a chemical equation are the exact value of the stoichiometric number for that entity.

Example

An example of an ionic chemical equation is provided below.

Chemical Equation: CaCl2 + 2AgNO3 → Ca(NO3)2 + 2AgCl↓

Ionic Equation: Ca2+ + 2Cl– + 2Ag+ + 2NO3– → Ca2+ + 2NO3– + 2AgCl↓

Explanation:

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