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10 Nov 2019

Solid, soluble silver nitrate is added slowly to a solution forwhich the initial concentrations of Cl-1 andCrO4-2 were [Cl-1 ]0 = 0.10 molL-1 and [CrO42- ]0 = 0.025 molL-1.

(a) Calculate [Ag+] when a precipitate first appears andidentify the precipitate. The Ksp values for AgCl(s) andAg2CrO4(s) are 1.8x10-10 and1.1x10-12, respectively.

(b) Calculate [Cl-1] and[CrO42-] just before the second precipitateis formed. What is the % efficiency of the separation? (i.e. If Xrepresents the anion that precipitates first, then what fraction ofX was precipitated from the solution at the instant the secondprecipitate starts to form?)

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Keith Leannon
Keith LeannonLv2
9 Mar 2019

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