Answer to Question #215082 in Inorganic Chemistry for Ewe

Question #215082
Given four 250 mg tablets of aspirin (90% purity) what volume of 0.50N NaOH is used in the hydrolysis reaction if 10.00 mL of 0.50 N HCl is consumed in the back titration?
1
Expert's answer
2021-07-08T04:55:01-0400

Start with the balanced equation.

C9H8O4 aspirin+2OH-→C7H5O-3 salicylate+C2H3O-2 acetate+H2O

Molar Mass of aspirin = 180.158

100/180.158

= 0.554mol

Molar Mass of NaOH = 39.997×0.5×0.554

= 11.07ml




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