Which reagent could be added to increase the SOLUBILITY of Mg(OH)2

Question

the equation is Mg(OH)2 (s) <---> Mg^2 2OH-

a) MgCl2

b) NH3

c) NaOH

d) H2O

e) HCl

What concept is being applied here???

Answer 1

water also. because when you add water, you decrease the saturation of the soln for Mg(OH)2.

Answer 2

e) HCl

Le Chatelier&#039;s Principle. The HCl will remove some OH from the solution, so the equilibrium will be pushed to the right.

H+ + OH- → H2O

Mg(OH)2 → Mg2+ + 2OH-