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CHEM2320 Test 2 - Test II TT Sp 07 Name 1 What is the pH of...

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Test II TT Sp 07 Name_______________________ 1. What is the pH of a 0.02 M solution of ethanolamine? B + H 2 O <-> HB +  + OH -          Kb = 3.2 x 10 -5 2. What is the pH of a 0.01 M solution of ethanolamine hydrochloride, BHCl? 3. A buffer solution consists of 0.03 M benzoic acid and 0.017 M sodium  benzoate. What is the pH of the buffer? HB <-> H +  + B -         Ka = 6.3 x 10 -5
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a) What is the pH of 25 ml of the buffer solution in (3) after the addition of 10 ml  of 0.04 M HCl? b) What is the pH of 30 ml of the buffer in (3) after the addition of 15 ml of 0.02 M  NaOH? 4. Carbonic acid has the following equilibria. H 2 CO 3  ---  H +  + HCO
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