Neco Model Questions Vol1 2017 Chemistry Question 19

Practice objective / multiple choice question 19 from the 2017 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2017 Chemistry Objective / Multiple Choice Medium Difficulty
Question 19 NECO_MODEL_QUESTIONS_VOL1 • 2017 • CHEMISTRY • objective

In an acidic solution, the following redox reaction occurs: \[ \mathrm{MnO_4^- + Fe^{2+} \rightarrow Mn^{2+} + Fe^{3+}} \] A 25.0 mL sample of 0.200 M \(\mathrm{KMnO_4}\) is titrated with excess \(\mathrm{Fe^{2+}}\) solution. The reaction is carried out in acidic medium supplied by \(\mathrm{H_2SO_4}\). (a) How many moles of \(\mathrm{Fe^{2+}}\) are required to react completely with the \(\mathrm{KMnO_4}\) sample? (b) How many millilitres of 0.500 M \(\mathrm{H_2SO_4}\) are needed to provide the required \(\mathrm{H^+}\) ions for the reaction?

Answer Options

A. a) 0.020 mol Fe²⁺; b) 32.0 mL of 0.500 M H₂SO₄.
B. a) 0.025 mol Fe²⁺; b) 20.0 mL of 0.500 M H₂SO₄.
Correct Answer C. a) 0.025 mol Fe²⁺; b) 40.0 mL of 0.500 M H₂SO₄.
D. a) 0.050 mol Fe²⁺; b) 40.0 mL of 0.250 M H₂SO₄.
Correct Answer
C
Correct Option:
a) 0.025 mol Fe²⁺; b) 40.0 mL of 0.500 M H₂SO₄.

About This Question

This is Neco Model Questions Vol1 2017 Chemistry Question 19. It is one of the objective questions from the 2017 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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