A portable hydrogen generator utilizes the reaction CaH_2 + H_2O ? Ca(OH)_2 + H_2

How many grams of H_2 can be produced by a 70 g cartridge of CaH_2?

Calcium hydride reacts with water to form calcium hydroxide and hydrogen gas.

CaH

2

+2H

2

O→Ca(OH)

2

+2H

2

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.