Question
Explain, why ammonia is evolved when water is added to the product formed, when magnesium is burned in air.
✓
Answer
Magnesium on burning in air produces magnesium nitride.
$
Mg + N _2 \longrightarrow Mg _3 N _2
$
When this magnesium ni tride comes in contact with water ammonia gas is released
$
Mg _3 N _2+6 H _2 O \longrightarrow 3 Mg ( OH )_2+2 NH _3
$
Key: Ammonia is formed from metal nitrides
$
Mg + N _2 \longrightarrow Mg _3 N _2
$
When this magnesium ni tride comes in contact with water ammonia gas is released
$
Mg _3 N _2+6 H _2 O \longrightarrow 3 Mg ( OH )_2+2 NH _3
$
Key: Ammonia is formed from metal nitrides
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