0.1 M solution of weak acid has pH=4.0. Calculate pKa.
20 mL of 0.1 M solution of weak acid was mixed with 8 mL 0.1 M solution of NaOH. Measured pH was 5.12. Calculate pKa.
Calculate the pH of a 0.2M solution of ammonia. Ka=5.62×10-10.
Calculate pH of 0.01 M aniline hydrochloride. Aniline pKb=9.4.
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