Page 149 - Chemistry_Form_2

Chemistry
for Secondary Schools

6. Neutralisation is a chemical reaction in which an acid reacts with a base to
form salt and water.
7. Neutralisation is applied in various useful situations such as treating
insect stings, relieving indigestion, neutralising harmful substances in the
environment and manufacturing fertilisers.
FOR ONLINE READING ONLY
8. Acids and alkalis are used in the manufacture of various industrial products.

9. Salt is an ionic compound which is made up of the positively charged ion
(cation) and negatively charged ion (anion).

10. The solubility of a solute in a given solvent is the number of grams of the
solute that will saturate 100 grams of a solvent at a given temperature.

11. All sodium, potassium, and ammonium salts are soluble in water.
12. All nitrates are soluble in water.

13. All chlorides are soluble in water except those of silver, mercury, and lead.
14. All sulfates are soluble in water except those of barium, calcium and lead.

15. All carbonates are insoluble in water except those of sodium, potassium,
and ammonium carbonates.
16. Salts have various uses. These include: controlling soil pH, as antacids, as
inorganic fertilisers, alleviating health disorders, and in the preservation
and seasoning of food.

Revision exercise 5

Choose the correct answer for Questions 1–6. For other questions, provide the
answers as per the demands indicated.

1. Which of the following is a natural acid?
(a) Nitric acid
(b) Phosphoric acid
(c) Citric acid
(d) Sulfuric acid
2. An acid is any substance that;
(a) contains hydrogen in its formula.
(b) dissolves in water to produce hydrogen ions.
(c) can react with NaOH.
(d) contains oxygen in its formula.

142 Student’s Book Form Two

01/08/2025 11:21:11
CHEMISTRY FORM TWO NEW 2025 DUMMY.indd 142 01/08/2025 11:21:11
CHEMISTRY FORM TWO NEW 2025 DUMMY.indd 142