Question

3. Write an equation for the following reactions:
(a) Aluminium with water
(b) Sodium with water
(C) Calcium with water
(d) Magnesium with sulphuric acid
(e) Iron reacts with steam
4. What happens when potassium reacts with:
(a) water?
(b) dilute sulphuric acid?
(C) oxygen?​

Answer 1

Answer:

1) ka opition a)

2)ka opition b)

Answer 2

Answer

3

a) Aluminium with water

2Al + 6H2O = 2Al(OH)3 + 3H2

(b) Sodium with water

2Na + 2H2O = 2NaOH + H2

(C) Calcium with water

C a+ 2H2O = Ca(OH)2 + H2

(d) Magnesium with sulphuric acid

Mg + H2SO4 = MgSO4 + H2

(e) Iron reacts with steam

3Fe + 4H2O = Fe3O4 + 4H2

4.

a) Potassium reacts violently with water to form potassium hydroxide and hydrogen gas. The reaction is highly exothermic due to which the hydrogen gas formed during reaction catches fire.

The reaction is given below:

2k + 2H2O = 2KOH + H2 + Heat

b) when potassium reacts with dilute sulphuric acid, the salt of potassium sulphate is formed in addition to hydrogen gas.

The reaction is given below:

K + H2SO4 = K2SO4 + SO2 + S + H2O

c) Potassium metal is very reactive that it reacts vigorously with oxygen and catches fire and starts burning when kept open in the air.

The reaction is given below:

4K + O2 = K2O

Hope it's helpful.

Please Mark me brainliest !!