State the substance/s reacted with dilute or concentrated sulphuric ac

1.	State the substance/s reacted with dilute or concentrated sulphuric acid to form the following gases: 1. Hydrogen 2. Carbon dioxide. State whether the acid used in each case is dilute or concentrated.
Answer» (1) Zinc (or any other reactive metal) reacts with dil. H₂SO₄ to give hydrogen. Zn (s) + H₂SO₄ (aq.) → ZnSO₄ (aq.) + H₂(g) (2) Sodium carbonate reacts with dil. H₂SO₄ to give CO₂ Na₂CO₃ (s) + H₂SO₄ (aq.) → Na₂SO₄(aq.) + H₂O(l) + CO₂ (g) The above reaction can also be carried out with NaHCO₃ (sodium bicarbonate) or KHCO₃ (potassium bicarbonate)

State the substance/s reacted with dilute or concentrated sulphuric acid to form the following gases: 1. Hydrogen 2. Carbon dioxide. State whether the acid used in each case is dilute or concentrated.

Answer»

(1) Zinc (or any other reactive metal) reacts with dil. H₂SO₄ to give hydrogen.

Zn (s) + H₂SO₄ (aq.) → ZnSO₄ (aq.) + H₂(g)

(2) Sodium carbonate reacts with dil. H₂SO₄ to give CO₂

Na₂CO₃ (s) + H₂SO₄ (aq.) → Na₂SO₄(aq.) + H₂O(l) + CO₂ (g)

The above reaction can also be carried out with NaHCO₃ (sodium bicarbonate) or KHCO₃ (potassium bicarbonate)