The molar solubility of CoCO3 in a (1.00x10^-3) M Na2CO3 solution is {M2} M. What is the Ksp for CoCO3?

1 Answer
Truong-Son N.
Apr 11, 2018

I'm just going to assume M_2 is a symbol for the molar solubility of "CoCO"_3 in this solution of sodium carbonate.

"CoCO"_3(s) rightleftharpoons "Co"^(2+)(aq) + "CO"_3^(2-)(aq)

"I"" "-" "" "" "" "" "0" "" "" "" "1.00xx10^(-3)
"C"" "-" "" "" "" "+M_2" "" "" "+M_2
"E"" "-" "" "" "" "" "M_2" "" "1.00xx10^(-3)+M_2

So then, the K_(sp) is given in terms of M_2...

color(blue)(K_(sp) = (M_2)(1.00 xx 10^(-3) + M_2))

If K_(sp) = 1.0 xx 10^(-10) in actuality, what is the molar solubility of "CoCO"_3(aq)?

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