Gce Model Questions Vol1 2019 Chemistry Question 9

Practice essay / theory question 9 from the 2019 Gce Model Questions Vol1 Chemistry examination. This question covers Redox Reactions .

Gce Model Questions Vol1 2019 Chemistry Essay / Theory

Topic: Redox Reactions

Question 9 GCE_MODEL_QUESTIONS_VOL1 • 2019 • CHEMISTRY • essay

The reaction between potassium permanganate and oxalic acid in acidic solution is commonly employed in volumetric analysis.

Question Parts

( a )

Write the balanced redox equation for the reaction in acidic medium.

( b )

Identify the oxidising agent and the reducing agent and state the change in oxidation numbers for the species involved.

( c )

In a titration, 25.0 cm³ of 0.0200 M KMnO₄ solution is required to completely oxidise 10.0 cm³ of oxalic acid solution. Calculate the concentration of the oxalic acid solution. (Assume the balanced equation from part (a) gives a 2 : 5 mole ratio between MnO₄⁻ and C₂O₄²⁻.)

( d )

Discuss two practical considerations that must be observed when using KMnO₄ as a titrant in redox titrations.

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About This Question

This is Gce Model Questions Vol1 2019 Chemistry Question 9. It is one of the essay questions from the 2019 Gce Model Questions Vol1 Chemistry examination.

The question covers Redox Reactions .

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