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Arrange the following compounds in decreasing order of acidity: H_(2)O, R- OH, HC -=CH |
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Answer» Solution :The order of acidity is : `H_(2)O, R- OH, HC -=CH` `to`The acidic strength increases with the increase in the electronegativity of atom and stability of the anion. The alcohol is a weak acid because the alkyl group destabilizes the alkoxide ion (conjugate base of the alcohol). In CASE of ETHYNE, the hydrogen is bonded to less electronegative atom, i.e., carbon whereas in water, the hydrogen is bonded to more electronegative element OXYGEN. So, the water is maximum acidic. |
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