A 0.050 M solution of Zn(NO₃)₂ is at 25 °C

CHEMISTRY · Single correct · AP · Chemistry · Equilibrium · Equilibrium

Problem

A 0.050 M solution of Zn(NO₃)₂ is at 25 °C. The solubility-product constant of Zn(OH)₂ at this temperature is

K_{sp}=3.0\times10^{-17}

. What is the pH at which Zn(OH)₂(s) just begins to precipitate when small amounts of NaOH(aq) are added? (a)

5.1

(b)

6.9

(c)

6.4

(d)

8.9