Question

Concentrated sulphuric acid is added to sodium nitrate and copper turnings heated
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Answer 1

Answer:The nitrate salt reacts with concentrated. H2SO4 to form nitric acid, which then reacts with the metal to form copper nitrate and nitrogen dioxide. ... Any nitrate will liberate reddish brown fumes of NO2 on heating with copper turnings and concentrated

Explanation:Sodium chloride react with sulfuric acid to produce sodium sulfate and hydrogen chloride. Sulfuric acid - concentrated solution. The reaction takes place in a boiling solution.Oct 5, 2015

Answer 2

When concentrated sulphuric acid is added to sodium nitrate and copper turnings and heated, then reddish-brown fumes of Nitrogen Dioxide are observed.

- The sodium nitrate salt reacts with concentrated. H2SO4 to form nitric acid:

NaNO3 + H2SO4 → HNO3 + NaHSO4

- It then decomposes into NO2 and O2:

4 HNO3 → 4 NO2 + 2 H2O + O2

- When nitric acid reacts with the copper turnings, it forms copper nitrate and nitric oxide:

3 Cu + 8 HNO3 → 3 Cu(NO3)2 + 2 NO + 4 H2O

- The nitric oxide combines with oxygen released earlier to form more nitrogen dioxide:

2 NO + O2 → 2NO2