Jawabanmu

2014-04-23T20:40:09+07:00
Ksp Cr(OH)2 = 1,08 .  10^{-19}

s?

Cr(OH)2 ->  Cr^{+2}  + 2 OH^{-}

ksp = 4 s^{2}
s =  \sqrt{ksp : 4}
Jawaban paling cerdas!
2014-04-23T20:46:02+07:00
Cr(OH)2 ⇔ Cr2+ + 2OH-

Ksp = [Cr2+] [OH-]^2
1,08 × 10^-19 = s × (2s)^2
1,08 × 10^-19 = 4s^3
s = ∛1,08 × 10^-19 / 4
s = ∛36 × 10^-21
s = 3,3 × 10^-7 M

2 3 2