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Science · Chemistry
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1 (16 pts) Niacin, one of the B vitamins, is a monoprotic acid having the formula (CsHaNCOOH) with Ka- 1.50 x 10. A 20.0 mL solution of 0.135 M niacin solution is titrated with 0.260 M NaoH. The titration reaction is CsHANCOOH (aq) NaOH(aq) C5HeNCOO Na(aq) H20 What is the pH at the equivalence point? Hint: At the equivalence point, CsH4NCOO (aq) undergoes hydrolysis Cs HANCOO (aq) H20 C5H4NCOOH (aq) OH (aq)
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