Question

Why are the following metals not used in the lab. preparation of hydrogen ?

(a) calcium (b) iron (c) aluminium (d) sodium

Answer 1

) Calcium has a very uncontrollable reaction with dilute H2SO4 or dilute HCL
Iron and aluminium react with dilute acids to form hydrogen and their respective salts.
d)Sodium again having a very uncontrollable reaction withe dilute acids cant be used as the exothermic reaction sets the hydrogen burning.

Sodium, Calcium and Ammonium ion is not used for lab preparation of Hydrogen because the Hydrogen is made of a like water that they include a chemicals and make a blast