# Oxides of most metals combine with water to form what?

Nov 15, 2016

Hydroxides of that metal.

#### Explanation:

Oxides of metals combine with water to form hydroxides of the metal.

For example,
$N {a}_{2} O$ + ${H}_{2} O$ ------> $2 N a O H$.
$M g O$ + ${H}_{2} O$ ------> $M g {\left(O H\right)}_{2}$.
$A {l}_{2} {O}_{3}$ + $3 {H}_{2} O$ ------> $2 A l {\left(O H\right)}_{3}$.