What happens when hydrogen reacts with calcium?

The reaction of hydrogen(H₂) with calcium(Ca) will result in the formation of Calcium hydride (CaH₂).

The reaction takes place at a high temperature of (300 to 400)⁰C.

Ca(s) + H₂ (g) $\stackrel{{(300-400)}^0\mathrm{C}}{\to }$ CaH₂(s)

• Calcium hydride is commonly used as a drying agent.

Drying agent: The reagents which help in drying water from substances.