Weak diprotic acid H2A is titrated with 0.2000 M NaOH. The initial concentration of H2A is...

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Chemistry

Weak diprotic acid H₂A is titrated with 0.2000 MNaOH. The initial concentration of H₂A is 0.1000 M andthe initial volume is 50.00 mL.Â Â Â Â Â K_a1 = 1.0 x 10^âˆ’5Â Â Â Â Â K_a2 = 1.0 x 10^âˆ’9
(a) (0.2 pt) Identify the predominate species at the firstequivalence point, by chemical formula:
(b) (0.5 pts) Calculate the pH of the acid solution before anybase is added.
(c) (0.5 pts) Calculate the pH at the first equivalencepoint.
(d) (0.2 pts) How many mL base, total, must be added to achievethe 2nd equivalence point?
(e) (0.5 pts) Calculate the pH at the second equivalencepoint.

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Solution a 02 pt Identify the predominate species at the first equivalence point by chemical formula Solution H2A NaOH HA H2O so the predominant species at the first equivalence point HA b 05 pts Calculate the pH of the acid solution before any base is added Solution ka1 HAH3OHA 10105 xx0100x since ka is small See Answer

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