Question

Calculate the volume required to dissolve 11.2 g cuso4 to prepare a 0.140m solution

Answer 1

Answer is: 0.5 dm³ to dissolve.

m(CuSO₄) = 11.2 g.

c(CuSO₄) = 0.140 mol/dm³,

V(CuSO₄) = ?

n(CuSO₄) = m(CuSO₄) ÷ M(CuSO₄).

n(CuSO₄) = 11.2 g ÷ 159.6 g/mol.

n(CuSO₄) = 0.07 mol.

V(CuSO₄) = n(CuSO₄) ÷ c(CuSO₄).

V(CuSO₄) = 0.07 mol ÷ 0.14 mol/dm³.

V(CuSO₄) = 0.5 dm³.