(1) Identify each of the following half-reactions as either an oxidation half-reaction or a reduction half-reaction....

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Question

(1) Identify each of the following half-reactions as either an oxidation half-reaction or a reduction half-reaction....

(1) Identify each of the following half-reactions as either an oxidation half-reaction or a reduction half-reaction.

half-reaction	identification
Cd(s)Cd²⁺(aq) + 2e^-
Ag⁺(aq) + e^-Ag(s)

Write a balanced equation for the overall redox reaction. Use smallest possible integer coefficients.

?	+	?		?	+	?

2. Identify each of the following half-reactions as either an oxidation half-reaction or a reduction half-reaction.

half-reaction	identification
Mn(s)Mn²⁺(aq) + 2e^-
Zn²⁺(aq) + 2e^-Zn(s)

(2) Write a balanced equation for the overall redox reaction. Use smallest possible integer coefficients.

?	+	?		?	+	?

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Answer 1

Answer #1

1)
a)
Here electron is lost in the reaction
So, this is oxidation
Answer: oxidation

b)
Here electron is gained in the reaction
So, this is reduction
Answer: reduction

c)
Reduction half cell is:
Ag+(aq) + e- -> Ag(s)

Oxidation half cell is:
Cd(s) -> Cd2+(aq) + 2e-

Balance number of electrons:
Reduction half cell is:
2 Ag+(aq) + 2 e- -> 2 Ag(s)

Oxidation half cell is:
Cd(s) -> Cd2+(aq) + 2e-

Now add both half reactions to get overall reaction.

2 Ag+(aq) + Cd(s) -> 2 Ag(s) + Cd2+(aq)

Answer:

2 Ag⁺(aq) + Cd(s) -> 2 Ag(s) + Cd²⁺(aq)

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Answer 2

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