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21 August, 10:33

Which substance is the oxidizing agent in the following reaction? Fe2S3 + 12HNO3 → 2Fe (NO3) 3 + 3S + 6NO2 + 6H2O Which substance is the oxidizing agent in the following reaction? Fe2S3 + 12HNO3 2Fe (NO3) 3 + 3S + 6NO2 + 6H2O Fe2S3 Fe (NO3) 3 H2O HNO3 NO2 Request Answer Provide Feedback

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  1. 21 August, 10:44
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    HNO3 is the oxidizing agent

    Explanation:

    Step 1:

    The oxidizing agent is responsible to oxidize another. but itself undergoes a reduction.

    Fe2S3:

    Fe has an oxidation number of + 3

    S has an oxidation number of - 2

    HNO3:

    O has an oxidation number of - 2 (we have 3 times O so this makes - 6)

    H has an oxidation number of + 1

    N has an oxidation number of + 5

    Fe (NO3) 3

    O has an oxidation number of - 2 (we have 3 times O so this makes - 6)

    Fe has an oxidation number of + 3

    Since NO3 has an oxidation number of - 1; N has an oxidation number of + 5

    S alone has an oxidation number of 0

    NO2:

    O has an oxidation number of - 2 (we have 2 times O, this makes - 4)

    N has an oxidation number of + 4

    Fe doesn't change from oxidation number. It stays + 3

    N goes from + 5 to + 4 → this is a reduction

    S goes from - 2 to 0 → this is an oxidation

    The reducing agent is the compound that contributes the oxidized species (S).

    The oxidizing agent contributes the reducing species (N)

    The answer is HNO3
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