Consider the dissolution of AB(s): AB(s)⇌A+(aq)+B−(aq) Le Châtelier's principle tells us that an increase in either [A+] or [B−] will shift this equilibrium to the left, reducing the solubility of AB. In other words, AB is more soluble in pure water than in a solution that already contains A+ or B− ions.
This is an example of the common-ion effect. The generic metal hydroxide M(OH)2 has Ksp = 5.85×10−18.
Part A
What is the solubility of M(OH)2 in pure water? Express the molar solubility numerically using three significant figures.
Part B
What is the solubility of M(OH)2 in a 0.202 M solution of M(NO3)2? Express the molar solubility numerically using three significant figures.
Get Answers For Free
Most questions answered within 1 hours.