In the iodometric titration of Cu, the thiosulfate titrant was stardardized with the use of 20 mL aliquot of 1.059x10-3 M stock solution of KIO3 stock solution and it was treated with KI and sulfuric acid. The endpoint required 25mL of titrant. a. find the concentration (in M) of thiosulfate titrant. The chemists boiled the water from 50 mL to 25 mL. They did procedures to ensure that Cu2+ ions are the only ones that remained in the solution. Then, they took 5mL aliquot, and added 0.1 M KI and deionized water. This was titrated and the endpoint was 30.96 mL of titrant. b. Find the molarity of Cu2+ in 5mL aliquot and then in the original 50mL water sample. c. Convert the concentration of Cu2+ in 50mL water sample to ppm
In the iodometric titration of Cu, the thiosulfate titrant was stardardized with the use of 20 mL aliquot of 1.059x10-3 M stock solution of KIO3 stock solution and it was treated with KI and sulfuric acid. The endpoint required 25mL of titrant.
a. find the concentration (in M) of thiosulfate titrant.
The chemists boiled the water from 50 mL to 25 mL. They did procedures to ensure that Cu2+ ions are the only ones that remained in the solution. Then, they took 5mL aliquot, and added 0.1 M KI and deionized water. This was titrated and the endpoint was 30.96 mL of titrant.
b. Find the molarity of Cu2+ in 5mL aliquot and then in the original 50mL water sample.
c. Convert the concentration of Cu2+ in 50mL water sample to ppm
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