7.39 How is nitrogen prepared in the laboratory? Write the chemical equations of the reactions involved.
7.39 How is nitrogen prepared in the laboratory? Write the chemical equations of the reactions involved.
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1 Answer
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7.39
Nitrogen is prepared in the laboratory by heating aqueous ammonium chloride (NH4Cl) with sodium nitrite (NaNO2) to form ammonium nitrite (NH4NO2), which is unstable. Ammonium nitrite breaks down to form nitrogen and water.
NH4Cl (aq) + NaNO2 (aq) - NH4NO2 + NaCl (aq)
NH4NO2 - N2 (g)+ H2O (l)
Small amounts of NO and HNO3 are also produced which can be removed by passing nitrogen gas through aqueous sulphuric acid containing potassium dichromate.
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