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Fabric Stain Removal Guide

Test Sheet Answers...

(1) 
Fe + CuSO4  ---->   FeSO4 + Cu

Fe + Cu2+ + SO42-  ---->   Fe2+ + SO42- + Cu
Now, the SO42- is unchanged left and right sides of the equation,
so has not been oxidised nor reduced.

Redox Reaction: Fe + Cu2+   ---->   Fe2+ + Cu
Iron Fe was oxidised to Fe2+, Cu2+ was reduced to Cu

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(2) 
Zn + HCl   ---->   ZnCl2 + H2 gas

Zn + 2H+ + 2Cl-  ---->   Zn2+ + 2Cl- + H2 gas

Redox Reaction: Zn + 2H+  ---->  Zn2+ + H2 gas
Zinc is oxidised to Zn2+, H+ is reduced to H2 gas

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