Powdered AgOH is slowly added to 2.0 L of a 0.020 M solution of NaOH until no more

Question

AgOH will dissolve. If Ksp = 1.4 x 10 -8 for AgOH:
a. What is [Ag
+] in the saturated solution?
b. What mass of AgOH had to be added to the solution to produce this
concentration of Ag+?

Answer 1

Ksp = (Ag^+)(OH^-)
You know Ks and OH^-, substitute and solve for (Ag^+) (in mols/L).

b. So you know (Ag^+) in mols/L. In 2.0L you will have twice as many mols. Then grams = mols x molar mass = ?

Answer 2

thanks

Answer 3

but how is the concentration of OH determined?