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h2 college chemistry

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Find the answers: Edexcel GCSE maths unofficial mark scheme 05-05-2016
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    hello any one knows how to do this question..please help me!!
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    Start by writing out the redox reaction equation for the nitrite ions and permanganate ions by combining these two.

    Permanganate reduction: 8 H+ + MnO4− + 5 e− → Mn2+ + 4 H2O
    Nitrite oxidation: NO2- + H2O → NO3- + 2H+ + 2e-

    This should give you the ratio of nitrite ions that react with the permanganate.

    Quote if you need help after this


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