# Is Hydrogen gas evolved when metals react with steam?

Oct 7, 2016

IF they react: yes.

#### Explanation:

In those cases the metal is oxidized. In some cases the oxide will react further to form a hydroxide:

$M + {H}_{2} O \to M O + {H}_{2}$

Or:
$2 M + 4 {H}_{2} O \to 2 M {\left(O H\right)}_{2} + {H}_{2}$

This is for metals with a valence of 2. For other metals the coefficients will be different:

$2 N a + 2 {H}_{2} O \to 2 N a O H + {H}_{2}$