HC5H4NCOO(aq) + H2O(l) -----> <------ H3O+ (aq) + C5H4NCOO- (aq) Niacin, HC5H4NCOO, ionizes in water according to the equation above. (Ka = 1.60 x 10-5 ) a. Write the equilibrium-constant expression, Ka, for the reaction  b. Calculate the pH of a 0.0100M solution of Niacin.  pH = __________ c. Calculate the hydroxide ion concentration, [OH- ], in the solution. [OH- ]= ________

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Q: There is a buffer solution containing 0.50 M acetic acid (CH3COOH, Ka= 1.8 X 10-5) and 0.50 M sodium…

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Q: A weak acid (pka = 6.3) is dissolved in solution with a final pH = 5.7. At this pH, some of the acid…

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Q: The pH for 6.1 × 10¬ª M solution of cocaine, a weak base, is 9.60. Determine the value of Kb for…

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Q: 16.57 The acid-dissociation constant for benzoic acid (CH$COOH) is 6.3 x 10-5. Calculate the…

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