Igcse Model Questions Vol1 2021 Chemistry Question 11
Practice objective / multiple choice question 11 from the 2021 Igcse Model Questions Vol1 Chemistry examination.
A 0.10 mol dm⁻³ solution of an unknown carboxylic acid HA has a measured pH of 2.85 at 25 °C. A second acid HB is identical to HA but contains an α‑chloro substituent, which increases its acid dissociation constant by a factor of 5. Calculate the acid dissociation constant \(K_a\) of HA and the pH of a 0.10 mol dm⁻³ solution of HB under the same conditions.
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This is Igcse Model Questions Vol1 2021 Chemistry Question 11. It is one of the objective questions from the 2021 Igcse Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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