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Question 2 The Mohr method is a well-known, highly utilized titrimetric method for the determination of chloride ion in a variety of samples. The Mohr titration method is based on the precipitation of chloride ion as insoluble silver chloride (AGCI) by reaction with standard silver nitrate (AGNO3) solution AgN03 (ag)+ Cl- (ag) AgCI (s) + NO3-(ag) Potassium chromate (K2CRO4) solution is added in a small volume (S 2 mL) as an endpoint indicator. In the presence of precipitated AGCI, the first drop of AGNO3 titrant beyond the equivalence point triggers the formation of a dull, yellow-brown solution color due to formation of the first traces of brick-red silver chromate (Ag2CrO4), which is less soluble than AgCi A 1.0514 g sample of an impure, water-soluble, chloride-containing salt was weighed to t0.1 mg and then transferred to a 250-mL volumetric flask roughly half-filled with deionized water The salt was dissolved, and the sample solution was diluted to 250 00 ml A 50.00-ml aliquot of the sample solution was pipetted into a medium-sized Erlenmeyer flask, followed by addition of 40 drops (approx 2 mL) of 0 1 M K2CrO4 indicator solution The 50.00-ml aliquot of the sample solution was titrated with 18 44 mL of 0.1027 M AGNO3 solution to the dull, yellow- brown endpoint due to K2CrO 4 Determine the weight percent chloride in the original sample.

Question 2 The Mohr method is a well-known, highly utilized titrimetric method for the determination of chloride ion in a variety of samples. The Mohr titration method is based on the precipitation of chloride ion as insoluble silver chloride (AGCI) by reaction with standard silver nitrate (AGNO3) solution AgN03 (ag)+ Cl- (ag) AgCI (s) + NO3-(ag) Potassium chromate (K2CRO4) solution is added in a small volume (S 2 mL) as an endpoint indicator. In the presence of precipitated AGCI, the first drop of AGNO3 titrant beyond the equivalence point triggers the formation of a dull, yellow-brown solution color due to formation of the first traces of brick-red silver chromate (Ag2CrO4), which is less soluble than AgCi A 1.0514 g sample of an impure, water-soluble, chloride-containing salt was weighed to t0.1 mg and then transferred to a 250-mL volumetric flask roughly half-filled with deionized water The salt was dissolved, and the sample solution was diluted to 250 00 ml A 50.00-ml aliquot of the sample solution was pipetted into a medium-sized Erlenmeyer flask, followed by addition of 40 drops (approx 2 mL) of 0 1 M K2CrO4 indicator solution The 50.00-ml aliquot of the sample solution was titrated with 18 44 mL of 0.1027 M AGNO3 solution to the dull, yellow- brown endpoint due to K2CrO 4 Determine the weight percent chloride in the original sample.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Question 2 The Mohr method is a well-known, highly utilized titrimetric method for the determination of chloride ion in a variety of samples. The Mohr titration method is based on the precipitation of chloride ion as insoluble silver chloride (AgCl) by reaction with standard silver nitrate (AgNO3) solution AGNO3 (ag)+ Cl- (ag) AgCI (s) + NO3-(ag) Potassium chromate (K2CrO4) solution is added in a small volume (S 2 mL) as an endpoint indicator. In the presence of precipitated AgCI, the first drop of AgNO3 titrant beyond the equivalence point triggers the formation of a dull, yellow-brown solution color due to formation of the first traces of brick-red silver chromate (Ag2Cr04), which is less soluble than AgCi A 1.0514 g sample of an impure, water-soluble, chloride-containing salt was weighed to :0.1 mg and then transferred to a 250-mL volumetric flask roughly half-filled with deionized water The salt was dissolved, and the sample solution was diluted to 250 00 ml A 50 00-mL aliquot of the sample solution was pipetted into a medium-sized Erlenmeyer flask, followed by addition of 40 drops (approx 2 mL) of 0 1 M K2CRO4 indicator solution The 50 00-ml aliquot of the sample solution was titrated with 18 44 mL of 0.1027 M AGNO3 solution to the dull, yellow- brown endpoint due to K2CrO 4 Determine the weight percent chloride in the original sample.
Transcribed Image Text:Question 2 The Mohr method is a well-known, highly utilized titrimetric method for the determination of chloride ion in a variety of samples. The Mohr titration method is based on the precipitation of chloride ion as insoluble silver chloride (AgCl) by reaction with standard silver nitrate (AgNO3) solution AGNO3 (ag)+ Cl- (ag) AgCI (s) + NO3-(ag) Potassium chromate (K2CrO4) solution is added in a small volume (S 2 mL) as an endpoint indicator. In the presence of precipitated AgCI, the first drop of AgNO3 titrant beyond the equivalence point triggers the formation of a dull, yellow-brown solution color due to formation of the first traces of brick-red silver chromate (Ag2Cr04), which is less soluble than AgCi A 1.0514 g sample of an impure, water-soluble, chloride-containing salt was weighed to :0.1 mg and then transferred to a 250-mL volumetric flask roughly half-filled with deionized water The salt was dissolved, and the sample solution was diluted to 250 00 ml A 50 00-mL aliquot of the sample solution was pipetted into a medium-sized Erlenmeyer flask, followed by addition of 40 drops (approx 2 mL) of 0 1 M K2CRO4 indicator solution The 50 00-ml aliquot of the sample solution was titrated with 18 44 mL of 0.1027 M AGNO3 solution to the dull, yellow- brown endpoint due to K2CrO 4 Determine the weight percent chloride in the original sample.
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