JAMB Chemistry 2011 Objective — Question 28

Question 28 of 49 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2011 Objective paper, with the correct answer and a full explanation.

MnO4(aq)+Y+5Fe2+(aq)→Mn2+(aq)+5Fe3+(aq)+4H2O(l). In the equation above, Y is

A. A. 8H+(aq)Correct
B. B. 5H+(aq)
C. C. 4H+(aq)
D. D. 10H(aq)

Explanation

The balanced equation for the redox reaction between MnO4 and Fe2+ is: MnO4+8H+5Fe2+ → Mn2++5Fe3++4H2O. Thus, Y = 8H+(aq).

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