Gce Model Questions Vol1 2023 Chemistry Question 4
Practice objective / multiple choice question 4 from the 2023 Gce Model Questions Vol1 Chemistry examination.
A 250.0 mL buffer solution contains 0.200 mol of acetic acid (\(\mathrm{CH_3COOH}\)) and 0.150 mol of sodium acetate (\(\mathrm{CH_3COONa}\)). The acid dissociation constant of acetic acid at 25 °C is \(K_a = 1.8\times10^{-5}\).\ (a) Calculate the initial pH of the buffer.\ (b) After adding 0.0200 mol of \(\mathrm{HCl}\) (volume change negligible), calculate the new pH.\ (c) To restore the original pH, how many millilitres of 0.100 M \(\mathrm{NaOH}\) solution are required?
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This is Gce Model Questions Vol1 2023 Chemistry Question 4. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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