1. Calculations of volumetric analysis ordinarily consist of transforming the quantity of titrant used (in chemical units) to a chemically equivalent quantity of analyte (also in chemical units) through use of a stoichiometric factor. Use chemical formulas and dimensional analysis (NO CALCULATIONS REQUIRED) to express the ratio for the calculation of the percentage (w/w) of: a. hydrazine in rocket fuel by titration with standard iodine. Reaction: H₂NNH₂ +21₂ →→→ N₂(g) + 4I* + 4H* ->> b. sulfur in an agricultural spray that was converted to thiocyanate with an unmeasured excess of cyanide. Reaction: S(s) 1 CN- → SCN- After removal of the excess cyanide, the thiocyanate was titrated with a standard potassium iodate solution in strong HCl. Reaction: 2SCN+ 3103 + 2H+ +6Cl →>>> 2SO4+2CN +3ICl₂ + H₂O

1. Calculations of volumetric analysis ordinarily consist of transforming the quantity of titrant used (in chemical units) to a chemically equivalent quantity of analyte (also in chemical units) through use of a stoichiometric factor. Use chemical formulas and dimensional analysis (NO CALCULATIONS REQUIRED) to express the ratio for the calculation of the percentage (w/w) of: a. hydrazine in rocket fuel by titration with standard iodine. Reaction: H₂NNH₂ +21₂ →→→ N₂(g) + 4I* + 4H* ->> b. sulfur in an agricultural spray that was converted to thiocyanate with an unmeasured excess of cyanide. Reaction: S(s) 1 CN- → SCN- After removal of the excess cyanide, the thiocyanate was titrated with a standard potassium iodate solution in strong HCl. Reaction: 2SCN+ 3103 + 2H+ +6Cl →>>> 2SO4+2CN +3ICl₂ + H₂O

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter13: Titrations In Analytical Chemistry

Section: Chapter Questions

Problem 13.5QAP

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