The Total solution for NCERT class 6-12
What is the maximum concentration ofequimolar solutions of ferrous sulphate and sodium sulphide so that when mixedin equal volumes, there is no precipitation of iron sulphide? (For ironsulphide, Ksp = 6.3 × 10–18).
Let the maximum concentration of each solutionbe x mol/L. After mixing, the volume of the concentrations ofeach solution will be reduced to half i.e.,
Ifthe concentrations of both solutions are equal to or less than 5.02 × 10–9 M, then there willbe no precipitation of iron sulphide.