Gce Model Questions Vol1 2019 Chemistry Question 16
Practice objective / multiple choice question 16 from the 2019 Gce Model Questions Vol1 Chemistry examination.
A buffer contains 0.250 mol of acetic acid (\(\mathrm{CH_3COOH}\)) and 0.150 mol of its conjugate base acetate (\(\mathrm{CH_3COO^-}\)) in 1.00 L of solution. The acid dissociation constant is \(K_a = 1.8\times10^{-5}\). How many millilitres of 0.10 M \(\mathrm{HCl}\) must be added to lower the pH of the solution by exactly 0.40 units?
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This is Gce Model Questions Vol1 2019 Chemistry Question 16. It is one of the objective questions from the 2019 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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