? asked in 科學及數學化學 · 1 decade ago

wt is disproportionation ?

如題。盡量以英文回答,,,,,但中文都可以

Update:

我唔係問解釋呀- - 可唔可以詳細d

the halogens are all to some extent soluble in water . However , the halogens will DISPROPORTIONATE rapidly .

4 Answers

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  • 1 decade ago
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    Disproportionation is the reaction in which both oxidation and reduction of the same element occurs.

    In Chemistry, disproportionation is known as 「歧化」. It should NOT be translated in a layman manner.

    Example 1 :

    Chlorine gas reacts with cold sodium hydroxide solution.

    Cl2(g) + 2OH-(aq) → Cl-(aq) + OCl-(aq) + H2O(l)

    Cl2(g) undergoes oxidation as the oxidation state (or oxidation number) of Cl increases from 0 to +1 (in OCl-).

    Cl2(g) also undergoes reduction as the oxidation state of Cl decreases from 0 to -1 (in Cl-).

    Therefore, Cl2(g) undergoes disproportionation.

    Example 2 :

    Heat the solution of NaOCl formed in Example 1.

    3OCl-(aq) → ClO3-(aq) + 2Cl-(aq)

    OCl-(aq) undergoes oxidation as the oxidation state of Cl increases from +1 to +5 (in ClO3-).

    OCl-(aq) also undergoes reduction as the oxidation state of Cl decreases from +1 to -1 (in Cl-).

    Therefore, OCl-(aq) undergoes disproportionation.

  • 1 decade ago

    I don't really think Uncle Michael is trying to say redox is the same as disproportionation in his answer.

  • 1 decade ago

    給nayeohnahc~~

    Uncle Michael雖然答得好長盡..但係你要知道,disproportionation同redox係兩樣野.唔好俾oxidation & reduction simutaneously 而以為disproportionation 係redox

  • 1 decade ago

    disproportionation = 不均衡, 不相稱

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