Why Does Na2SO4 Get Reduced in This Reaction?

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In the reaction Na2SO4 + 4 C → Na2S + 4 CO, Na2SO4 is identified as the substance that gets reduced. To determine this, one must analyze the oxidation states of the elements involved. The oxidation numbers change, indicating that Na2SO4 undergoes reduction while carbon is oxidized to CO. Understanding redox reactions involves recognizing that one substance is reduced and another is oxidized based on these changes in oxidation states. This fundamental principle clarifies why Na2SO4 is the correct answer.
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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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