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Redox Reaction

In the follow...

Question

In the following reaction:
$M n O_{2} (s) + 4 H C l (a q) \to M n C l_{2} (a q) + C l_{2} (g) + 2 H_{2} O (l)$
Identify the oxidising and reducing agents.

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Solution

$M n O_{2}$ loses oxygen therefore it is reduced and thus it acts as an oxidizing agent. On the other hand HCl loses hydrogen. It is oxidized thus it acts as a reducing agent.Therefore in the reaction $M n O_{2}$ is the oxidizing agent and HCl is the reducing agent.

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{MnO}_{2} (s) + 4 HCl(aq) \to {MnCl}_{2} (aq) + {Cl}_{2} (g) + 2 H_{2} O(l)

Identify the oxidising and reducing agents in the above reaction. Give an example of a decomposition reaction.
[2 Marks]

Q. In the following reactions, identify the oxidising agent and the reducing agent.

4 H C l + M n O_{2} \to M n C l_{2} + 2 H_{2} O + C l_{2}

Q. In the following reaction, identify the species oxidised, the species reduced, the oxidising agent and the reducing agent.

4 H C l + M n O_{2} \to M n C l_{2} + 2 H_{2} O + C l_{2}

Q. What is the oxidising agent in the following reaction?

2 F e_{a q}^{2 +} + C l_{2 (g)} \to 2 F e_{(a q)}^{3 +} + 2 C l_{(a q)}^{-}

Q. (a) Define (i) oxidation, and (ii) reduction.
(b) Identify the substances oxidised and reduced in the chemical reaction:
MnO₂ + 4HCl → MnCl₂+ Cl₂+ 2H₂O

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