Give an example to show the effect of concentration of nitric acid on the formation of oxidation product.

 


 
Effect of concentration of nitric acid on the formation of oxidation product can be understood by its reaction with conc HNO3 . Dilute and concentrated nitric acid give different oxidation products on reaction with copper metal.
 
3 Cu+8HNO3 (Dil.)  3Cu (NO)2 + 2NO + 4H2O
Cu+4HNO 3 ​  (Conc)→3Cu(NO 3 ​ )2 ​  +2NO 2 ​  +2H2​O3)2 +2NO2+2H2O