Question

Illustrate how copper metal can give different products on reaction with HNO3.

Answer 1

Answer:

$2cu + 2hno3 = 2cuno3 + h2$

Answer 2

Hii Students,

Reaction of copper metal with nitric acid depends on concentration of nitric acid.

# Copper + dil.HNO3 -

Copper metal on reaction with dilute HNO3 gives copper nitrate, nitric oxide and water.

3 Cu + 8 dil.HNO3 --> 3 Cu(NO3)2 + 2 NO + 4 H2O

# Copper + conc.HNO3 -

Copper metal on reaction with concentrated HNO3 gives copper nitrate, nitrogen dioxide and water.

Cu + 4 conc.HNO3 --> Cu(NO3)2 + 2 NO2 + 2 H2O

Hope this helps you..