Igcse Model Questions Vol1 2022 Chemistry Question 8

Practice objective / multiple choice question 8 from the 2022 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2022 Chemistry Objective / Multiple Choice Medium Difficulty

Question 8 IGCSE_MODEL_QUESTIONS_VOL1 • 2022 • CHEMISTRY • objective

A student prepares 250 mL of a buffer by mixing 0.20 mol of acetic acid (\(K_a = 1.8\times10^{-5}\)) with solid sodium acetate (molar mass 82.0 g mol\(^{-1}\)). The resulting pH is 4.75. Calculate the mass of sodium acetate that must have been added.

Answer Options

A. 20.0 g

B. 14.2 g

Correct Answer C. 16.6 g

D. 18.5 g

Correct Answer

Correct Option:

16.6 g

About This Question

This is Igcse Model Questions Vol1 2022 Chemistry Question 8. It is one of the objective questions from the 2022 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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Igcse Model Questions Vol1 2022 Chemistry Question 8

A student prepares 250 mL of a buffer by mixing 0.20 mol of acetic acid (\(K_a = 1.8\times10^{-5}\)) with solid sodium acetate (molar mass 82.0 g mol\(^{-1}\)). The resulting pH is 4.75. Calculate the mass of sodium acetate that must have been added.

Answer Options

About This Question

Master the Exam!

A student prepares 250 mL of a buffer by mixing 0.20 mol of acetic acid (\(K_a = 1.8\times10^{-5}\)) with solid sodium acetate (molar mass 82.0 g mol\(^{-1}\)). The resulting pH is 4.75. Calculate the mass of sodium acetate that must have been added.