Consider the conproportionation reaction between MnO4 – (aq) and Mn2+(aq) leadin
ID: 958787 • Letter: C
Question
Consider the conproportionation reaction between MnO4 – (aq) and Mn2+(aq) leading to MnO2(s).
(a) (5 pts) Balance the conproportionation reaction in acidic media using smallest whole number coefficients.
(b) (2 pts) Explain the meaning behind, “conproportionation.”
(c) (2 pts) Evaluate E o (V) for the conproportionation reaction in (a). The standard reduction potential between MnO4 – (aq) and MnO2(s) is +1.68 V.
(d) (2 pts) Is this conproportionation reaction spontaneous? (Yes/No) Explain your choice.
Explanation / Answer
a) 2MnO4- + 3Mn2+ -------> 5MnO2 + 4H+
b) Comproportionation chemical reaction is a reaction when reactants, each containing are the same element but with a different oxidation number, will form a product in which the elements involved reach the same oxidation number.