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Identify the oxidant and the reductant i...

Identify the oxidant and the reductant in the following reactions:
a. `Zn(s)+(1)/(2)O_(2)(g)rarrZn(s)`
b. `Zn(s)+2H^(o+)(aq)rarrZn^(2+)(aq)+H_(2)(g)`

Text Solution

Verified by Experts

In reaction (a), `Zn` donates electrons to `O` to give zinc and oxide ions. Therefore, `Zn` acts as a reducing agent while oxygen acts as an oxidising agent.
In reaction (b), `Zn` transfers its electrons to `H^(o+)`, and therefore, zinc acts as a reducing agent and `H^(o+)` acts as an oxidising agent.
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