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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 ammonium chloride and sodium nitrite. The ammonium nitrite formed as a result of double decomposition reaction, being unstable decomposes to form dinitrogen gas.
`NH_(4)Cl(aq)+NaNO_(2)(aq)toNH_(4)NO_(2)(aq)+NaCl(aq)`
`underset("Amm.nitrite")(NH_(4)NO_(2)(aq))overset("Heat")tounderset("Dinitrogen")(N_(2)(g)+2H_(2)O(l)`
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