Answer
The reaction with water always yields the hydroxide of metal M, $M(OH)_x$ and hydrogen:
$MH_x+xH_2O\rightarrow M(OH)_x+xH_2$
Work Step by Step
We can denote an ionic hydride by $MH_x$. The reaction with water always yields the hydroxide of metal M, $M(OH)_x$ and hydrogen:
$MH_x+xH_2O\rightarrow M(OH)_x+xH_2$