Name the reactants and products in the following skeletal equation and balance them.
(v) $N a + H_{2} O \to N a O H + H_{2}$

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Solution

The skeletal equation is:
$N a + H_{2} O \to N a O H + H_{2}$
Reactants are sodium and water, the products are sodium hydroxide and hydrogen.

Count the number of atoms of each element.

To equalize $H_{2}$ , multiply $H_{2} O$ and $N a O H$ by $2$

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

To equalize $N a$ , multiply it by $2$

$2 N a + 2 H_{2} O \to 2 N a O H + H_{2}$
Hence, the equation is balanced.

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