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kam asked in 科學及數學化學 · 1 decade ago



1)copper(I) ion

2)silver ion

3)manganese(II) ion

4)copper(II) ion

5)chromiun(III) ion



1 Answer

  • ?
    Lv 7
    1 decade ago
    Favorite Answer

    The colours of ions in water :

    1. copper(I) ion - not applicable

    Copper(I) ion cannot exist in water. In water, copper(I) ion undergoes disprorportionation (self redox reaction).

    2Cu+(aq) → Cu(s) + Cu2+(aq)

    2. silver ion - colourless

    3. manganese(II) ion - colourless

    The colour of Mn2+(aq) should be pale pink. However, in CE level, Mn2+(aq) ion is usually obtained from the reduction of dilute (<0.1 M) acidified KMnO4 solution. Due to the low concentration, the pale pink colour is too pale to be observed, and thus Mn2+(aq) ion appears as colourless.

    4. copper(II) ion - blue

    5. chromium(III) ion - green

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