Activity 2.13 NCERT Class 10 Science, Acids, Bases and Salts

Activity 2.13 NCERT Class 10 Science, Chapter 2 Acids, Bases, and Salts

Procedure:

Activity 2.13 asks us to write the formula of various salts, their source and group them into their families.

Answer: 

Formula: 

Potassium sulphate: K₂SO₄; Sodium sulphate: Na₂SO₄; Calcium sulphate: CaSO₄; Magnesium sulphate: MgSO₄; Copper sulphate: CuSO₄; Sodium chloride: NaCl; Sodium nitrate: NaNO₃; Sodium carbonate: Na₂CO₃; Ammonium chloride: NH₄Cl.

Acids and bases which forms these salts: 

When acids and bases mix, they react vigorously and form respective salt.

Acid + Base ———–> Respective salt

Example:

Sodium hydroxide + Nitric acid ———–> Sodium nitrite.

NaOH  + HNO₃ ————> NaNO₃ + H₂O

Acids used:

Sulphuric acid (H₂SO₄); Hydrochloric acid (HCl), Nitric Acid (HNO₃), Carbonic acid (H₂CO₃).

Bases used:

Sodium Hydroxide (NaOH); Magnesium Hydroxide (Mg(OH)₂); Calcium Hydroxide (Ca(OH)₂).

Family:

Sodium salts: Sodium sulphate, Sodium chloride, Sodium nitrate, Sodium carbonate.

Similarly, we can group other salts as Potassium salts, magnesium salts, Ammonium Salts, Chloride salts, Sulphate salts, Nitrate salts etc.

Next:  Solubility and PH of a salt solution, Activity 2.14.

See also: PH of soil, Activity 2.12.