Igcse Model Questions Vol1 2021 Chemistry Question 7

Practice essay / theory question 7 from the 2021 Igcse Model Questions Vol1 Chemistry examination. This question covers Acids Bases and Salts .

Igcse Model Questions Vol1 2021 Chemistry Essay / Theory

Topic: Acids Bases and Salts

Question 7 IGCSE_MODEL_QUESTIONS_VOL1 • 2021 • CHEMISTRY • essay

A 0.250 mol sample of acetic acid (CH₃COOH, Ka = 1.8 × 10⁻⁵) is dissolved in water and diluted to 1.00 L. Sodium acetate (CH₃COONa) is then added until the concentration of acetate ion becomes 0.20 mol L⁻¹. The resulting solution is used as a buffer.

Question Parts

( a )

Calculate the pH of the buffer solution.

( b )

A 250.0 mL sample of this buffer is mixed with 0.010 mol of HCl. Calculate the new pH of the solution, showing all steps.

( c )

Suggest a suitable indicator for an acid–base titration in which this buffer is titrated with NaOH. State the pH range of the indicator and justify why it is appropriate.

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About This Question

This is Igcse Model Questions Vol1 2021 Chemistry Question 7. It is one of the essay questions from the 2021 Igcse Model Questions Vol1 Chemistry examination.

The question covers Acids Bases and Salts .

View More Igcse Model Questions Vol1 2021 Chemistry Questions More Igcse Model Questions Vol1 Practice Questions Back to Questions

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