# Change into formula equations and balance them? (easy steps to balance)

$2 C u \left(s\right) + S \left(s\right) + \Delta \rightarrow C {u}_{2} S \left(s\right)$
${H}_{3} P {O}_{4} \left(a q\right) + C a {\left(O H\right)}_{2} \left(a q\right) \rightarrow C a H P {O}_{4} \left(s\right) \downarrow + 2 {H}_{2} O \left(l\right)$
In aqueous solution, the product $C {a}_{3} {\left(P {O}_{4}\right)}_{2}$ would be fairly unlikely.