explain and answer plsWatch
2–(aq) + bH2O(l) → c MnO4
(aq) + d MnO2(s) + eOH–
What are the values of a and c in the balanced chemical equation?
A 2 1
B 3 2
C 4 3
D 5 4
Oxidation: MnO42- ---> MnO4- (oxidation number of Mn change +6 to +7) ---(1)
Reduction: MnO42- --> MnO2 (oxidation number of Mn change +6 to +4) ---(2)
For (1), both numbers of Mn and oxygen atoms are equal, and just balance the charge is ok.
For (2), it needs to balance the charge and atoms by means of H2O and OH-.
MnO42- + 2H2O +2e- ---> MnO2 + 4OH-
MnO42- --> MnO4- + e-
COmbine together to get the answer