Question

6 6. Zinc hydroxide, Zn(OH)2. is practically insoluble in pure water. (Kap 3.0 x 10-16) a) Determine the pH of a saturated aqueous solution of Zn(O1H)2. (You should assume that all hydroxide ions in the solution come from the Zn(OH)2: you can ignore the autoionization of water.) (4 pts) b) Zn(OH)2 is less soluble in even very dilute solutions of Zn(NOs)2 due to the common ion effect. Determine the molar solubility of zine hydroxide in a 1.0 x 10-4 M solution of Zn(NO3)2 (aq). (Again, you can ignore the autoionization of water.) (4 pts) molar solubility c) Contrary to what you might expect, Zn(OH)2 is more soluble in a strongly basic solution. Write a balanced chemical reaction for the dissolving of Zn(OH)2 (s) in the presence of excess OH (aq), and determine the numerical value of the equilibrium constant for this reaction. Draw a box around the balanced chemical equation and around the equilibrium constant. Please include state symbols such as (s) and (aq). (4 pts) Write a balanced chemical Zn(OH)2 is also more soluble in strongly acidic solutions. d) reaction for the dissolving of Zn(OH)2 (5) in the presence of excess H (aq), and determine the numerical value of the equilibrium constant for this reaction. Draw a box around the balanced chemical equation, and around the equilibrium constant. Please include state symbols such as (s) and (aq). (4 pts) 16 pts)

Answer 1

are f mces LoH) 23

2 .bxlo-μ ч拦 -is

1) -12

ず2 + 24,0 (a4