Gce Model Questions Vol1 2021 Chemistry Question 9

Practice essay / theory question 9 from the 2021 Gce Model Questions Vol1 Chemistry examination. This question covers Redox Reactions .

Gce Model Questions Vol1 2021 Chemistry Essay / Theory

Topic: Redox Reactions

Question 9 GCE_MODEL_QUESTIONS_VOL1 • 2021 • CHEMISTRY • essay

Potassium permanganate is used to titrate oxalic acid dihydrate (H2C2O4·2H2O) in acidic solution. The reaction proceeds in an acidic medium and the standardised KMnO4 solution has a concentration of 0.0200 M.

Question Parts

( a )

Write the balanced overall redox equation for the reaction in acidic medium, showing the oxidation numbers of manganese and carbon in the reactants and products.

( b )

During a titration, 25.00 mL of the 0.0200 M KMnO₄ solution is required to reach the endpoint. Calculate the mass of oxalic acid dihydrate present in the sample.

( c )

Explain why the permanganate–oxalic acid reaction is suitable for the standardisation of a KMnO₄ solution.

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About This Question

This is Gce Model Questions Vol1 2021 Chemistry Question 9. It is one of the essay questions from the 2021 Gce Model Questions Vol1 Chemistry examination.

The question covers Redox Reactions .

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