Answer: Option (b) is the correct answer.
Explanation:
When we say that an equation is balanced then it means there are equal number of atoms on both reactant and product side.
For example, [tex]Ca_{3}(PO_{4})_{2} + H_{2}SO_{4} \rightarrow CaSO_{4} + H_{3}PO_{4}[/tex]
Number of atoms on reactant side are as follows.
Number of atoms on product side are as follows.
Therefore, to balance this equation we multiply [tex]H_{2}SO_{4}[/tex] by 3 on reactant side and multiply [tex]CaSO_{4}[/tex] by 3 and [tex]H_{3}PO_{4}[/tex] by 2 on product side.
Hence, the balanced equation will be as follows.
[tex]Ca_{3}(PO_{4})_{2} + 3H_{2}SO_{4} \rightarrow 3CaSO_{4} + 2H_{3}PO_{4}[/tex]
