A solution containing Cl- was analyzed as follows in a back titration. A solution containing (excess) Ag + is added, and the AgCl precipitate is filtered and removed. The excess Ag is then titrated with SCN- Ag+ (aq) + Cl(aq) --- --> AgCl (s) Ag+ (aq) + SCN- (aq) --> AgSCN (aq) In one analysis, 25.00 mL of 0.01840 M AgNO3 (aq) was added to 50.00 mL of a solution containing dissolved chloride. The resulting AgCl (s) was filtered and removed. The excess Ag+ (aq) remaining required 14.25 mL of 0.02008 M SCN (aq) to reach the endpoint. What is the original concentration of CI (aq) in the original 50.00 mL soln?

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
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Chapter17: Complexation And Precipitation Reactions And Titrations
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Problem 17.25QAP
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A solution containing Cl- was analyzed as follows in a back titration. A solution containing (excess) Ag + is
added, and the AgCl precipitate is filtered and removed.
The excess Ag is then titrated with SCN-
Ag+ (aq) + Cl(aq) ---
--> AgCl (s)
Ag+ (aq) + SCN- (aq)
--> AgSCN (aq)
In one analysis, 25.00 mL of 0.01840 M AgNO3 (aq) was added to 50.00 mL of a solution containing
dissolved chloride. The resulting AgCl (s) was filtered and removed. The excess Ag+ (aq) remaining
required 14.25 mL of 0.02008 M SCN (aq) to reach the endpoint.
What is the original concentration of CI (aq) in the original 50.00 mL soln?
Transcribed Image Text:A solution containing Cl- was analyzed as follows in a back titration. A solution containing (excess) Ag + is added, and the AgCl precipitate is filtered and removed. The excess Ag is then titrated with SCN- Ag+ (aq) + Cl(aq) --- --> AgCl (s) Ag+ (aq) + SCN- (aq) --> AgSCN (aq) In one analysis, 25.00 mL of 0.01840 M AgNO3 (aq) was added to 50.00 mL of a solution containing dissolved chloride. The resulting AgCl (s) was filtered and removed. The excess Ag+ (aq) remaining required 14.25 mL of 0.02008 M SCN (aq) to reach the endpoint. What is the original concentration of CI (aq) in the original 50.00 mL soln?
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