Balanced chemical reaction:
2Na₃PO₄(aq) + 3CaCl₂(aq) → 6NaCl(aq) + Ca₃(PO₄)₂(s).
Ionic reaction:
6Na⁺(aq) + 2PO₄³⁻(aq) + 3Ca²⁺(aq) + 6Cl⁻(aq) → 6Na⁺(aq) + 6Cl⁻(aq) + Ca₃(PO₄)₂(s).
Net ionic reaction: 2PO₄³⁻(aq) + 3Ca²⁺(aq) → Ca₃(PO₄)₂(s).
<span>(aq) means that
substances are dissociated on cations and anions in water.
</span>(s) means solid.
Molar mass of CuSO4*5H2O = <span>63.5 + 32 + 4(16) + 5(18) = 249.5 g/mole
molarity is calculated as follows:
molarity = number of moles of solutes/liters of solution
We will assume that the number of liters = 1
Substituting in the above equation:
0.02 = number of moles of CuSO4*5H2O / 1
number of moles = 0.02 moles
number of moles = mass/molar mass
mass = number of moles * molar mass
mass = 0.02 * </span><span>249.5 = 4.99 grams</span>