Chemistry

Predict the most likely redox reaction and use the spontaneity rule to predict whether the reaction will occur spontaneously.

1. An aqueous solution of potassium permanganate was reacted with an acidic solution of sodium bromide and an orange-born substance was formed.

Can someone start me off on this?

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asked by Alex
  1. The presence of the orange-"born--what's that>" makes me think Br2 was formed. If that's true then I know permanganate in acid solution goes to Mn^+2.
    So you would write the two half cells as
    MnO4^- ==> Mn^+2 (acid solution)
    Br^- ==> Br2
    and balance from there.
    Then look up the reduction potentials but you already know it should occur because you obtained a product.

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