In each of the following balanced oxidation-reduction equations, identify those

Question

In each of the following balanced oxidation-reduction equations, identify those elements that undergo changes in oxidation number and indicate the magnitude of the change in each case.

Part A 2MnO4(aq)+3S2(aq)+4H2O(l)3S(s)+2MnO2(s)+8OH(aq) Enter your answers as chemical symbols separated by a comma. elements changing the oxidation number are:

Part C 4H2O2(aq)+Cl2O7(g)+2OH(aq)2ClO2(aq)+5H2O(l)+4O2(g) Enter your answers as chemical symbols separated by a comma. elements changing the oxidation number are:

Part E Ba2+(aq)+2OH(aq)+H2O2(aq)+2ClO2(aq)Ba(ClO2)2(s)+2H2O(l)+O2(g) Enter your answers as chemical symbols separated by a comma. elements changing the oxidation number

Explanation / Answer

part A )

MnO4- , oxidation state of Mn = +7

MnO2 , oxidation state of Mn = +4

S-2 oxidation state of S = -2

S oxidation state of S = 0

oxidation numbers : (+7 , -2 , +4 , 0)

part C)

Cl2O7 oxidation number of Cl = +7

ClO2- oxidation number of Cl = +3

H2O2 oxidation number of O = -1

H2O oxidation number of O = -2

order : (+7 , -1 , +3 , -2)

part E )

elements changing oxidation numbers :

Cl oxdiation state in reactatns = +4

in product Cl oxdiation number = +3

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