Question

Write the product by giving balanced chemical equation 

(i) When sulphur reacts with conc. nitric acid. 

(ii) When phosphorus reacts with conc. sulphuric acid. 

(iii) When phosphorus reacts with conc. nitric acid.

Answer 1

(i) When Sulphur reacts with concentrated nitric acid, sulphuric acid, nitrogen dioxide and water are formed as the products.

The reaction is as follows: 

S + 6HNO₃→ H₂SO₄ + 6NO₂ + 2H₂O

(ii) When white phosphorous reacts with concentrated sulphuric acid the products formed are phosphorous acid and Sulphur dioxide. 

The reaction is as follows: 

P₄ + 6H₂SO₄→ 4H₃PO₃ + 6SO₂

(iii) When phosphorous reacts with concentrated nitric acid formation of phosphoric acid, nitrogen dioxide and water takes place.

The reaction is as follows:

P + 5HNO₃→ H₃PO₄ + 5NO₂ + H₂O