perchromate ion vs chromate ion

Discussion in 'DAT Discussions' started by arpitpatel86, May 17, 2008.

  1. arpitpatel86

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    some1 please explain to me why perchromate is CrO and chromate is CrO4
     
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  3. doc3232

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    There are a LOT of chromate ions and they always just fully oxidize.
    K2Cr2O7 H2CrO4 CrO3
    These are the only 3 that I have seen, but they all do the same things.
    I would assume CrO3 would do the same.

    and I just re-read your question......
    Generally the "middle" molecule has no prefixes.
    As for the "per," think of perchlorate and chlorate, ClO3 for chlorate and perchlorate for the less oxidized form, ClO.
     

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