Write chemical equations for the following word equation and balance them.

f) Sodium reacts with water to form sodium hydroxide and hydrogen.

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Solution

Chemical equation:
$Na + H_{2} O \to NaOH + H_{2}$

To equalize hydrogen, multiply $H_{2} O$ and $NaOH$ by 2 .

$Na + 2 H_{2} O \to 2 NaOH + H_{2}$

To equalize Na, multiply it by $2 .$

$Na + 2 H_{2} O \to 2 NaOH + H_{2}$

The equation is balanced.

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