A saturated solution of BaSO₄ at 25$$^\circ$$C is 4 $$\times$$ 10^$$-$$5 M. The solubility of BaSO₄ in 0.1 M Na₂SO₄ at this temperature will be

A solution is saturated with SrCO₃ and SrF₂. The $$[CO_3^{2 - }]$$ is found to be 1.2 $$ \times $$ 10^-3 M. The concentration of F^- in the solution would be

Given : K_sp(SrCO₃) = 7.0 $$ \times $$ 10^-10,

K_sp(SrF₂) = 7.9 $$ \times $$ 10^-10

Which of the following mixtures will have the lowest pH at 298 K?

Dissolving NaCN in de-ionised water will result in a solution having