Question

Fill in the blank space and then balance the chemical equation.

____________ + _________ $\to {\mathrm{FeSO}}_4+{\mathrm{H}}_2$

Answer 1

Balanced chemical equation:

A chemical equation in which the number of atoms of each element on both sides of the equation is called a balanced chemical equation.

Step 1: The completed equation:

$\underset{\mathrm{Iron}}{\mathrm{Fe}\left(\mathrm{s}\right)}+\underset{\mathrm{Sulphuric}\mathrm{acid}}{{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)}\to \underset{\mathrm{Iron}\mathrm{sulphate}}{{\mathrm{FeSO}}_4\left(\mathrm{aq}\right)}+\underset{\mathrm{Hydrogen}}{{\mathrm{H}}_2\left(\mathrm{g}\right)}$

Step 2: Calculating the number of atoms on the reactants and product side:

Elements	Number of atoms on the reactant side	Number of atoms on the product side
Fe	1	1
H	2	2
S	1	1
O	4	4

Step 3: Balancing the atoms on the reactants and product side:

• The number of all the atoms is equal on the reactant and product sides.
• Therefore, the equation is already balanced.