1. Answer the following set of questions regarding the redox equationlisted belo

Question

1.           Answer the following set of questions regarding the redox equationlisted below:

           KMnO4   +  Na2SO3   +  H2O     MnO2  +  Na2SO4   +   KOH

           The charge (oxidation #) of sulfur in Na2SO3is:

           The charge (oxidation #) of sulfur in Na2SO4is:

           The change in the charge (oxidation #) ofsulfur is:

           The charge (oxidation #) of manganese in KMnO4is:

           The charge (oxidation #) of manganese in MnO2 is:

           The change in the charge (oxidation #) ofmanganese is:

           Fill in coefficients to give the correct balanced equationbelow:

Explanation / Answer

Hello,

Equation is already balanced

All compounds have a net oxidation state of zero. Oxygenin compound has an oxidation state of minus two, except for oxygenas peroxide

Na2SO3

2Na + S + 3O =0 , S = 4

2*1 + S + (3*-2) = 0 ,  2 + S -6 =0   , S = 6 -2 = 4

Na2SO4

2 + x -8 = 0 , x =6           

The change in the charge (oxidation #)of sulfur is 2

Means we get oxidation.

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