Question

Which of the following is/are correct information(s) regarding 0.4 M – aq solution of weak monobasic acid, HA, at 25°C ? (Given : Ka of HA = 4 × 10–5, log 2 = 0.3)
(1) pH of solution is 2.4
(2) pOH of solution is 2.4
(3) [H+] from water is 2.5 × 10–12 M
(4) Percentage of unionised HA molecules is about 99%

Answer 1

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