Question

give the reaction of calcium and magnesium with dilute Hno3

Answer 1

i think Like many metals magnesium reacts with dilute acids to produce hydrogen plus the magnesium salt of the acid. e.g.

Mg + 2HNO3 ----> Mg(NO3)2 +H2

However, if concentrated nitric acid is used magnesium reacts violently to produce oxides of nitrogen (NO & NO2), as the nitric acid is reduced by the magnesium, which is a strong reducing agent;-

Mg + 2HNO3 ---> MgNO3 + NO2 + H2O