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Question
Can PCl5 act as an oxidising as well as a reducing agent? Justify.
Solution 1
PCl5 can only act as an oxidizing agent. The highest oxidation state that P can show is +5. In PCl5, phosphorus is in its highest oxidation state (+5). However, it can decrease its oxidation state and act as an oxidizing agent.
Solution 2
The oxidation state of P in PCl5 is+5. Since P has five electrons in its valence shell, therefore, it cannot donate electron and cannot increase its oxidation state beyond + 5, Thus, PCl5 cannot act as a reducing agent. It can act as oxidizing agent by itself undergoing reduction.
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