The solubility-product constants, Ksp, at 25 ∘C for two compounds [iron(II) carbonate, FeCO3, and cadmium(II) carbonate,...

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The solubility-product constants, Ksp, at 25 ∘C for two compounds [iron(II) carbonate, FeCO3, and cadmium(II) carbonate,...

The solubility-product constants, Ksp, at 25 ∘C for two compounds [iron(II) carbonate, FeCO3, and cadmium(II) carbonate, CdCO3] are given by the table

Substance	Ksp
FeCO3	2.10×10−11
CdCO3	1.80×10−14

A solution of Na2CO3 is added dropwise to a solution that contains 1.21×10⁻²MFe2+ and 1.45×10⁻²M Cd2+. What concentration of CO32− is need to initiate precipitation? Neglect any volume changes during the addition.

Express the molar concentration numerically.

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Answer 1

Answer #1

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