A 0.2985 g sample of an antibiotic powder was dissolved in HCl and the solution diluted to 100.0 mL. A20.00 ml aliquot was transferred to a flask and followed by 25.00 ml of 0.01886 M KBRO3. An excess ofKBr was added to form Br2, and the flask was stoppered. After 10 min, during which time the Br2brominated the sulfanilamide, an excess of KI was added. The liberated iodine titrated with 12.88 ml of0.1235 M sodium thiosulfate. Calculate the percent sulfanilamide (NH2C,H4SO2NH2) in the powder.Bro, + 5Br + 6H*3Br, + 3H,0NH2NH2Br.Br+ 2B12+ 2H++ 2BrSO,NH2SO,NH2sulfanilamideBr, + 512Br + 12excess2 + 25,0,-25,0,2 + 21--MM: NH2C6H4SO2NH2 = 172.21KBRO3= 167.00KBr119.00

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Answered: A 0.2985 g sample of an antibiotic…

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

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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A series of solutions containing NaOH, Na.CO, and NaHCO, alone or in compatible combination, was titrated with o.1202 needed to titrate 25.00-mL portions of each solution to (1) a phenolphthalein and (2) a bromocresol green end point. Use this information to deduce the composition of the solutions. In addition, calculate the mass in milligrams of each solute per milliliter of solution. M HCI. Tabulated below are the volumes of acid (2) (1) (а) 22.42 (Ъ) 15.67 (c) 29.64 (d) 16.12 (е) о.00 22.44 42.13 36.42 32.23 33.333
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