Gce Model Questions Vol1 2019 Chemistry Question 7

Practice essay / theory question 7 from the 2019 Gce Model Questions Vol1 Chemistry examination. This question covers Acids, Bases and Salts, Buffer Solutions, pH Calculations .

Gce Model Questions Vol1 2019 Chemistry Essay / Theory
Topics: Acids, Bases and Salts Buffer Solutions pH Calculations
Question 7 GCE_MODEL_QUESTIONS_VOL1 • 2019 • CHEMISTRY • essay

A student prepares a buffer solution by dissolving 0.50 mol of acetic acid (CH₃COOH, Ka = 1.8 × 10⁻⁵) and 0.30 mol of sodium acetate (CH₃COONa) in 1.0 L of water.

Question Parts

( a )
Explain, with reference to the acid‑base equilibrium, how this mixture resists changes in pH when small amounts of a strong acid or a strong base are added.
( b )
Calculate the pH of the buffer solution.
( c )
The student adds 0.10 mol of 0.1 M HCl to the buffer (volume change is negligible). Calculate the new pH after the addition, showing all steps.
( d )
Discuss two practical applications where such a buffer would be advantageous, and explain why its buffering capacity is appropriate for each application.

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About This Question

This is Gce Model Questions Vol1 2019 Chemistry Question 7. It is one of the essay questions from the 2019 Gce Model Questions Vol1 Chemistry examination.

The question covers Acids, Bases and Salts, Buffer Solutions, pH Calculations .

View More Gce Model Questions Vol1 2019 Chemistry Questions More Gce Model Questions Vol1 Practice Questions Back to Questions

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