Question

(b) Identify the following reactions as either oxidation or reduction:

i) Ca-2e-1 Ca2+

ii) Fe3+ +e-1 Fe2+

iii) Na – e

-1 Na+1

iv) Pb2+ + 2e-1 Pb

v) O + 2e-1 O


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Answer 1

Answer:

• it is simple if the Oxygen is removed & Hydrogen is added so it is reduction .
• if Oxygen is added & Hydrogen is removed so it is oxidation