Label the redox of each reaction. Indicate the number ofelectrons moving for eac

Question

Label the redox of each reaction. Indicate the number ofelectrons moving for each half reaction. Include all oxidationstates. P4 + 5O2 --> P4O10 2MnO4-1 +16H+1 +5C2O4-2 --> 2Mn+2 + 10CO2 +8H2O PbS + 4H2O2 --> PbSO4 + 4H2O 2NO2 + H2O --> HNO2 + HNO3 Label the redox of each reaction. Indicate the number ofelectrons moving for each half reaction. Include all oxidationstates. P4 + 5O2 --> P4O10 2MnO4-1 +16H+1 +5C2O4-2 --> 2Mn+2 + 10CO2 +8H2O PbS + 4H2O2 --> PbSO4 + 4H2O 2NO2 + H2O --> HNO2 + HNO3 2MnO4-1 +16H+1 +5C2O4-2 --> 2Mn+2 + 10CO2 +8H2O PbS + 4H2O2 --> PbSO4 + 4H2O 2NO2 + H2O --> HNO2 + HNO3

Explanation / Answer

The given redox reactions 1) P4 + 5O2P4O10 this is not a redox reaction, inthis reaction P forms its oxide, there is moving of 8e-for each half reaction. 2) 2Mno4- + 16H+ +5H2C2O4 2Mn+2 +10CO2+ 8H2O. this is an important redoxreaction in Redox titrations. when we consider each half reactionfor Mn moving of 5e-, for C moving of1e-. Mn oxidation state changed to Mn+7Mn+2 3) PbS + 4H2O2 PbSO4+ 4H2O in this reaction there is no moving ofelectrons in Pb, its oxidation state +2 3) PbS + 4H2O2 PbSO4+ 4H2O in this reaction there is no moving ofelectrons in Pb, its oxidation state +2 but moving of 4e- in S atomand its oxidationstate changed to +2 +6 4)NO2 + H2O HNO2 +HNO3 in this reaction N oxidation state is chnaged to+4 +3 and +5, there is to half reactions, there are a) NO2 NO2-  , in this half raction thereis moving of 1e- b) NO2 NO3- inthis half reaction moving of 1electron

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