Igcse Model Questions Vol1 2017 Chemistry Question 21
Practice objective / multiple choice question 21 from the 2017 Igcse Model Questions Vol1 Chemistry examination.
A 100.0 mL sample of a weak monoprotic acid HA is titrated with 0.100 M NaOH. The initial pH of the acid solution is 3.00. After the addition of 25.0 mL of the NaOH solution, the pH becomes 5.00. Assuming the acid dissociates only as HA \(\rightleftharpoons\) H⁺ + A⁻, calculate the acid dissociation constant \(K_a\) of HA. Give your answer in scientific notation to two significant figures.
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This is Igcse Model Questions Vol1 2017 Chemistry Question 21. It is one of the objective questions from the 2017 Igcse Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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