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Illustrate how copper metal can give dif...

Illustrate how copper metal can give different products on reaction with `HNO_3`.

Text Solution

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The oxidizing nature of `HNO_3` depends on
(i) Concentration of an acid
(ii) Nature of metal
(iii) Temperature of the reaction:
`underset("dilute")(3Cu + 8HNO_(3) to 3Cu(NO_(3))_(2) + 2NO + 4H_(2)O`
`underset("conc")(Cu + 4HNO_(3) to Cu(NO_(3))_(2) + 2NO_(2) + 2H_(2)O`
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