The sulfur content of an iron pyrite ore sample is determined by converting it to H2S gas, absorbing the H2S in 10.0mL of 0.00500 M I2, and then back-titrating the excess 12 with 0.00200 M Na,S203. If 2.6mL Na2S203is required for the titration, how many milligrams of sulfur are contained in the sample? (Mwt of H2S is 34.08g/mol). Reactions: H2S + I2 ---- > S+ 21" + 2H* I2+ 2S20,2- ---------> 21- + S,0,2-
The sulfur content of an iron pyrite ore sample is determined by converting it to H2S gas, absorbing the H2S in 10.0mL of 0.00500 M I2, and then back-titrating the excess 12 with 0.00200 M Na,S203. If 2.6mL Na2S203is required for the titration, how many milligrams of sulfur are contained in the sample? (Mwt of H2S is 34.08g/mol). Reactions: H2S + I2 ---- > S+ 21" + 2H* I2+ 2S20,2- ---------> 21- + S,0,2-
Chapter13: Titrations In Analytical Chemistry
Section: Chapter Questions
Problem 13.27QAP
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