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The solubility product constant, Ksp, for nickel (II) carbonate, NiCO3, is 1.3 x 10-7 at 25C.
a. Write the balanced chemical equation for this dissolving process

b. Write the equilibrium expression

c. Find the maximum molar concentration of all ions in solution

Please help!

Answers

Answered by DrBob222
, Ksp, for nickel (II) carbonate, NiCO3, is 1.3 x 10-7 at 25C.
a. Write the balanced chemical equation for this dissolving process
b. Write the equilibrium expression
c. Find the maximum molar concentration of all ions in solution
...............NiCO3(s) + H2O ==> Ni^2+(aq) + [CO3]^2-(aq)
I...................solid..........(l)............0....................0
C..................solid(-x)....(l).............x....................x
E...................solid..........(l).............x....................x
Ksp = (Ni^2+)[CO3]^2- = 1.3E-7. Substitute from the E line into Ksp expression.
1.3E-7 = (x)(x) = x^2
x = sqrt(1.3E-7) = ? M
So (Ni^2+) = x = [CO3]^2- = approx 3.6E-4 M
NOTE: I don't know exactly how your prof writes these equations or expressions so you may need to adjust what I wrote to match how your class usually does it. For example I don't usually write H2O in the dissolution process. Also, I show -x for the solid change but solid-x still is a solid.
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thank you so much!
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