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How is nitrogen prepared in the laborato...

How is nitrogen prepared in the laboratory ? Write the chemical equations of the reactions involved.

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Nitrogen is prepared in the laboratory by heating an equimolar aqueous solution of ammonia chloride with sodium nitrite. The ammonium nitrite formed as a result of double decomposition reaction, being unstable decompose to form dinitrogen gas.
`NH_(4)Cl_((aq))+NaNO_(2(aq))rarrNH_(4)NO_(2(aq))+NaCl_((aq))`
`underset("Ammonium nitrite")(NH_(4)NO_(2(aq)))overset("Heat")rarr underset("Dinitrogen")(N_(2(g))+2H_(2)O_((l)))`
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