Why Does Na2SO4 Get Reduced in This Reaction?

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SUMMARY

In the reaction Na2SO4 + 4 C → Na2S + 4 CO, sodium sulfate (Na2SO4) is reduced. This conclusion is drawn from analyzing the oxidation states of the elements involved. Sodium sulfate's sulfur changes from +6 in Na2SO4 to -2 in Na2S, indicating a reduction. The carbon (C) is oxidized to carbon monoxide (CO), confirming the redox nature of the reaction.

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Homework Statement


20. Which substance gets reduced in the reaction below?
Na2SO4 + 4 C → Na2S + 4 CO
a.CO
b.Na2SO4
c.C
d.Na2S
e.this is not an oxidation-reduction reaction

Homework Equations


none


The Attempt at a Solution


i know how to find the oxidation numbers, but why is b the answer I don't understand why.
Can anyone explain why? Thanks.
 
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physicsman2 said:

Homework Statement


20. Which substance gets reduced in the reaction below?
Na2SO4 + 4 C → Na2S + 4 CO
a.CO
b.Na2SO4
c.C
d.Na2S
e.this is not an oxidation-reduction reaction

Homework Equations


none


The Attempt at a Solution


i know how to find the oxidation numbers, but why is b the answer I don't understand why.
Can anyone explain why? Thanks.

A redox-reaction is when one substance is reduced and one is oxidized. Count all oxidation numbers and see how it changes.
 

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