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Reactivity With Air CO2 and Water (Group 1)

How many mole...

Question

How many moles of oxygen gas are produced when $0.500 m o l$ of $N a_{2} O_{2}$ reacts with water?

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Solution

Sodium peroxide reacts with water as follows:

$N a_{2} O_{2_{(s)}} + 12 H_{2} O_{(l)} \to 2 N a O H_{(a q)} + H_{2} O_{2_{(a q)}}$

As we can see from the reaction that oxygen is not evolved on reacting sodium peroxide with water, so we will get zero moles of oxygen on reacting $0.500 m o l$ of $N a_{2} O_{2}$ with water.

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