Problem: At 25 °C the solubility of magnesium carbonate is 3.16 x 10-3 mol/L. Calculate the value of Ksp at this temperature. Give your answer in scientific notation to 2 SIGNIFICANT FIGURES (even though this is strictly incorrect).

FREE Expert Solution

We’re being asked to determine Ksp of magnesium carbonate at 25 °C.


Recall that Ksp is an equilibrium constant related to slightly soluble ionic compounds


The dissociation of magnesium carbonate in solution is as follows:

MgCO3(s)  Mg2+(aq) + CO32–(aq)


We can construct an ICE table for this dissociation



Remember that solids are ignored in the ICE table and Ksp expression.


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Problem Details

At 25 °C the solubility of magnesium carbonate is 3.16 x 10-3 mol/L. Calculate the value of Ksp at this temperature. Give your answer in scientific notation to 2 SIGNIFICANT FIGURES (even though this is strictly incorrect).

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