A 10 ml of ascorbic acid (MW=176.1) injection was transferred to a 100 ml volumetric flask and made up to volume with deionized water. A 20 ml of the diluted injection was transferred to a conical flask and titrated with Iodine VS using starch mucilage as the indicator. The iodine solution was standardized against a solution of sodium thiosulfate primary standard (MW=248.2). Results: Weight of sodium thiosulfate used to prepare 100 mL primary standard solution = 2.501 g Volume of thiosulfate solution required to titrate 25 mL of Iodine solution = 24.83 mL Volume of iodine solution required to titrate 20 mL of the diluted ascorbic acid injection = 21.55 mL Stated content of the injection = 10% w/v Calculate the % of the stated content in the injection. (Round-off your answer to 2-decimal places) Answer = ____%

A 10 ml of ascorbic acid (MW=176.1) injection was transferred to a 100 ml volumetric flask and made up to volume with deionized water. A 20 ml of the diluted injection was transferred to a conical flask and titrated with Iodine VS using starch mucilage as the indicator. The iodine solution was standardized against a solution of sodium thiosulfate primary standard (MW=248.2). Results: Weight of sodium thiosulfate used to prepare 100 mL primary standard solution = 2.501 g Volume of thiosulfate solution required to titrate 25 mL of Iodine solution = 24.83 mL Volume of iodine solution required to titrate 20 mL of the diluted ascorbic acid injection = 21.55 mL Stated content of the injection = 10% w/v Calculate the % of the stated content in the injection. (Round-off your answer to 2-decimal places) Answer = ____%

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter3: Statistical Tests With Excel

Section: Chapter Questions

Problem 10P

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