(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

What is the pH of a saturated Zn(OH)_{2}solution?

Ksp = 1.2 x 10^-17

2. Relevant equations

Ksp = [Zn2+] [OH-]^2

Zn(OH)2 <----> Zn2+ + 2OH-

pOH = -log [OH-]

pH = 14- pOH

3. The attempt at a solution

Ksp = 1.2 x 10^-17 = [Zn2+] [OH-]^2

Zn(OH)2 <----> Zn2+ + 2OH-

- x +x +2x

1.2 x 10^-17 = [x][2x]^2 = 4x^3

x = 1.4 x 10^-6 M

[OH-] = 2x = 2.8 x 10^-6 M

pOH = - log 2.8 x 10^-6 = 5.5

pH = 14 - 5.5 = 8.5

Again I am learning this on my own and do not have a solution manual to the textbook I am using. So just s quick check would be greatly appricated. Thank you for your time.

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# Homework Help: CHEMISTRY- another pH question

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