# How does sodium hydride react with water?

$N a H \left(s\right) + {H}_{2} O \left(l\right) \rightarrow N a O H \left(a q\right) + \frac{1}{2} {H}_{2} \left(g\right) \uparrow$
The hydride anion is is unstable with respect to oxidation in water. Hydride salts are often used as drying agents (of organic solvents) for this reason. Lithium aluminum hydride, $L i A l {H}_{4}$, is a very common reducing agent in organic chemistry.