You prepare a standard NaOH solution for the laboratory, usingpotassium hydrogen phthalate (KHC,H,O,, abbreviated KHP) as theprimary standard. KHP (molar mass = 204.22 g/mol) has one acidichydrogen. It took 31.55 mL of the NaOH solution to titrate (reactexactly with) 0.750 g KHP. You then use the standard base solution todetermine the amount of ascorbic acid in a 500.0 mg tablet of vitaminC. Ascorbic acid (HC̟H,O, molar mass 176.12 g/mol) also has oneacidic hydrogen, and is usually mixed with some filler in preparing thetablets. It requires 19.14 mL of the NaOH to titrate (react exactly with)the ascorbic acid found in one 500.0 mg tablet. What is the percentvitamin C by mass in the tablet?

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the ascorbic acid found in one 500.0 mg tablet. What is the percent vitamin C by mass in the tablet?

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter11: Solutions

Section: Chapter Questions

Problem 39P

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