Basic solution Potassium permanganate, KMnO 4 is a powerful oxidizing agent. The

Question

Basic solution

Potassium permanganate, KMnO4 is a powerful oxidizing agent. The products of a given redox reaction with permanganate ion depend on the reaction conditions used. In basic solution, the following equations represents the reaction of this ion with a solution containing sodium sulfite:

MnO4- (aq) + SO32- (aq) -> MnO2 (s) + SO42- (aq)

Since this reaction takes place in basic solution H2O (l) and OH- (aq) will be shown in the reaction. Places for these species are indicated by the blanks in the following restatement of the equation:

MnO4- (aq) + SO32- (aq) + ___ -> MnO2 (s) + SO42- (aq) + ___

Part B

What are the coefficients of the six species in the balanced equation above? Remember to include H2O (l) and OH- (aq) in the blanks where appropriate.

Enter the equation coefficients in order seperated by commas

Explanation / Answer

A)

MnO4- + 4 H+ + 3e-= MnO2 + 2 H2O)x2
SO32- + H2O = SO42- + 2 H+ + 2e-)x3

2 MnO4- + 2H+ + 3 SO32- = 2 MnO2 + 3 SO42- + H2O


add 2 H+ on the left and on the right side and remember that 2 H+ + 2OH- = 2 H2O

2 MnO4- + 3 SO32- + H2O = 2 MnO2 + 3 SO42- + 2 OH-

B)

coeficients are 2,3,1 = 2,3,2

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