A sample of hard water contains 0.005 mole of per litre

CHEMISTRY · Subjective · AP · Chemistry · Equilibrium · Equilibrium

Problem

A sample of hard water contains 0.005 mole of

\text{CaCl}_2

per litre. What is the minimum concentration of

\text{Na}_2\text{SO}_4

which must be added for removing

\text{Ca}^{2+}

ions from this water sample?

K_{sp}

for

\text{CaSO}_4

2.4 \times 10^{-5}

at 25°C.