一些07 chem mc 的解釋

請解釋07 chem mc # 15,33,40,43,45,46,47

thx a lot

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  • 1 decade ago
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    解左兩題先..

    43. ionic bond exists between ammonium ion and nitrate ion.

    covalent bond exists between nitrogen atom and hydrogen atom in the ammonium ion.

    van der Waal's forces do not exist as ammonium nitrate exists as a giant ionic structure,no discrete molecules present.

    46. concentrated nitric acid behaves as a strong oxidizing agent. It oxidizes copper and nitrogen dioxide(a brown gas) is produced.

    the half equation of reduction of NO3-(aq) is

    NO3- (aq) + 2H+ (aq) + e- ------> NO2(g) + H2O(l)

    the mole ratio of NO3- to electron is 1 :1

    A displacement reaction is in form of

    atom of element X + ion of element Y -----> atom of element Y + ion of element X

    The reaction is not a displacement reaction

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