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Question

(a) Dilute nitric acid is generally considered a typical acid except for its reaction with metals. In what way is dilute nitric acid different from other acids when it reacts with metals?

(b) Write the equation for the reaction of dilute nitric acid and conc. nitric acid with copper.


Solution

(a) Dilute acid is generally considered a typical acid except for its reaction with metals 
since it does not liberate hydrogen. It is a powerful oxidizing agent and the nascent 
oxygen formed oxidizes the hydrogen to water. 

(b) (i) With diluted HNO3

                  3Cu+8HNO33Cu(NO3)2+4H2O+2NO

    (ii) With conc. HNO3

                 Cu+4HNO3Cu(NO3)2+2H2O+2NO2


Chemistry
Concise Chemistry
Standard X

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