✔ 最佳答案
1.
MnO4- + 8H+ + 5e- -->Mn2+ + 4H2O-----(1)
H2O2-->O2 + 2H+ + 2e- -----------------------(2)
(1)x2, (2)x5
2MnO4- + 16H+ + 10e- -->2Mn2+ + 8H2O
5H2O2-->5O2 + 10H+
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2MnO4 + 5H2O2 + 6H+ -->2Mn2+ + 5O2 + 8H2O
2.
MnO4- + 8H+ + 5e- -->Mn2+ + 4H2O-----(1)
Fe2+ -->Fe3+ + e- -------------------------------(2)
(2)x5
5Fe2+ -->5Fe3+ + 5e-
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MnO4- + 5Fe2+ + 8H+ -->Mn2+ + 5Fe3+ + 4H2O
hope i can help u