Question

Calcium sulphate
9. Which of the following is an acid salt?
(a) Sodium carbonate
(b) Sodium sulphite
(c) Calcium carbonate
(d) Calcium bicarbonate
10. Indigestion is caused due to excess in stomach of
(a) Sodium chloride
(b) Sodium hydroxide
(c) Hydrochloric acid
(d) Calcium hydroxide
Fun​

Answer 1

Explanation:

Acidity of stomach has to be neutralized by a base, without affecting or damaging the cells of the body.

Ca(OH)

2

is highly caustic while Mg(OH)

2

is not, because it has very low solubility in water. Similarly, NaHCO

3

is a weak base.

Thus, NaHCO

3

and Mg(OH)

2

are used as an antacid (against gastric acids like HCl).

NaHCO

3

+HCl→NaCl+H

2

O+CO

2

↑

Mg(OH)

2

+2HCl→MgCl

2

+2H

2

O