Ijmb Model Questions Vol1 2025 Chemistry Question 7

Practice essay / theory question 7 from the 2025 Ijmb Model Questions Vol1 Chemistry examination. This question covers Acids, Bases, Buffers, Indicators .

Ijmb Model Questions Vol1 2025 Chemistry Essay / Theory

Topics: Acids Bases Buffers Indicators

Question 7 IJMB_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • essay

A buffer solution is prepared by dissolving 0.250 mol of acetic acid (CH₃COOH, Ka = 1.8 × 10⁻⁵) and 0.150 mol of sodium acetate (CH₃COONa) in enough water to make 1.00 L of solution.

Question Parts

( a )

Calculate the pH of the buffer solution.

( b )

0.050 mol of 0.10 M HCl is added to the buffer (assume the volume change is negligible). Determine the new pH and explain the direction of the pH change.

( c )

Recommend a suitable indicator for titrating this buffer with NaOH and justify your choice based on the expected pH range of the titration.

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About This Question

This is Ijmb Model Questions Vol1 2025 Chemistry Question 7. It is one of the essay questions from the 2025 Ijmb Model Questions Vol1 Chemistry examination.

The question covers Acids, Bases, Buffers, Indicators .

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