Question

Give the balanced reactions for the following:
(a) Sodium is dropped in water,
(b) Magnesium reacts with boiling water,
(c) Red hot iron reacts with steam,
(d) Iron reacts with dilute HCl.

Answer 1

1. When sodium is dropped in water, following reaction occurs:

2 Na (s) + 2 H₂O(l)→2 NaOH(aq) + H₂(g)

2. Magnesium reacting with boiling water:

Mg(s) + 2 H₂O(l) →Mg(OH)₂(aq) + H_​2(g)

3. Iron reacting with steam:

3 Fe(s) +4 H₂O (g) →Fe₃O₄(s) + 4 H₂(g)

4. Iron reacts with HCl:

Fe(s) + 2 HCl(aq) → FeCl₂(aq) + H₂(g)