Question

Balance the following equations:

${\mathrm{As}}_2{\mathrm{O}}_3+{\mathrm{H}}_2\mathrm{S}\to {\mathrm{As}}_2{\mathrm{S}}_3+{\mathrm{H}}_2\mathrm{O}$

Answer 1

Step 1: Chemical equations:

Chemical equations are chemical reactions illustrated in the form of chemical symbols and formulae. The chemical equations can be balanced or unbalanced as per the count of atoms.

Step 2: Balancing the given reaction

The given equation is:

${\mathrm{As}}_2{\mathrm{O}}_3+{\mathrm{H}}_2\mathrm{S}\to {\mathrm{As}}_2{\mathrm{S}}_3+{\mathrm{H}}_2\mathrm{O}$

The table presents the values of atoms for each element.

Number of elements	In reactants	In products
As	2	2
O	3	1
H	2	2
S	1	3

Add 3 as a coefficient in front of water $\left({\mathrm{H}}_2\mathrm{O}\right)$ and 3 in front of hydrogen sulfide $\left({\mathrm{H}}_2\mathrm{S}\right)$ to balance the oxygen atoms. The count of atoms in arsenic trioxide $\left({\mathrm{As}}_2{\mathrm{O}}_3\right)$ and arsenic trisulfide $\left({\mathrm{As}}_2{\mathrm{S}}_3\right)$ remains the same.

Hence, the balanced chemical equation is given as follows:

${\mathrm{As}}_2{\mathrm{O}}_3+3{\mathrm{H}}_2\mathrm{S}\to {\mathrm{As}}_2{\mathrm{S}}_3+3{\mathrm{H}}_2\mathrm{O}$