Question

For the reaction 3ZnCO3 + 2H3PO4 —> 3H2O + 3CO2, how many miles of zinc carbonate are required to produce 3.0 mil of Zn3(PO4)2?

Answer 1

Answer:

$\boxed{ \text{9.0 mol of ZnCO _{3} }}$

Explanation:

(a) Balanced equation

3ZnCO₃ + 2H₃PO₄  ⟶ Zn₃(PO₄)₂ + 3H₂O + 3CO₂

(b). Calculation

You want to convert moles of Zn₃(PO₄)₂  to moles of ZnCO₃

The molar ratio is 1 mol Zn₃(PO₄)₂:3 mol ZnCO₃  

$\text{Moles of ZnCO _{3} } =\text{3.0 mol Zn _{3} (PO _{4})_{2} } \times \dfrac{\text{3.0 mol ZnCO _{3} }}{\text{1 mol Zn _{3} (PO _{4} ) _{2} }} \\\\\\= \text{9.0 mol ZnCO _{3} }$

You need $\boxed{ \textbf{9.0 mol of ZnCO _{3} }}$ to form 3.0 mol of Zn₃(PO₄)₂.