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Multistep problem that I'm confused on the entire thing: A) The addition of 5E-3 total moles...

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Chemistry

Multistep problem that I'm confused on the entire thing:

A) The addition of 5E-3 total moles of Zn2+ to a 1.0L solutionof NaCN gives a solution of the complex ion[Zn(CN)4-2](Kf=4.2E19). What is theconcentration of uncomplexed Zn2+ ions if theconcentration of cyanide ions in the final solution is 0.5M?

B) ZnCO3 is sparaingly soluble salt with aKsp=1.0E-7. The addition of CN- (aq) to ZnCO3(s) yieldsthe complex ion [Zn(Cn)42-] (aq) with theKf mentioned before in Part A. Write the reaction.

C) What will be the Keq for this overall reaction?

D) What is the solubility of ZnCO3 (s) in a solutionof NaCN (aq) where the equilibrium concentration of cyanide in thesolution is 0.2 M? Use the calculated Keq from Part C.

Answer & Explanation Solved by verified expert
4.1 Ratings (523 Votes)
Kf is formation of complex Ksp is dissolution constant A Zn2 4NaCN ZnCN42 concentration of Zn2    See Answer
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