Page 146 - Chemistry_Form_2

Chemistry
for Secondary Schools

Table 5.13: Uses of some salts in daily life
S/N Salt Uses
1. Sodium chloride (a) An essential ingredient in food
(NaCl) (b) Preservation of food
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(c) Manufacturing of soaps
(d) Making a freezing mixture which is used
by ice-cream vendors
2. Sodium carbonate (a) To remove stain from clothes
(Na CO 3 ) (Washing (b) Production of detergents and soaps
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soda) (c) Manufacture of glass, paper, and textiles
(d) Softening hard water
(e) In fire extinguishers

3. Sodium (a) Used as baking soda
hydrogencarbonate (b) In fire extinguishers
(NaHCO ) (c) As an antacid in medicine
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4. Ammonium chloride (a) Used as an electrolyte in the manufacture
(NH Cl) of dry batteries
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(b) Used as an acidifier
5. Copper(II) sulfate (a) Used as a fungicide to kill certain germs
(CuSO ) (b) In electroplating
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(c) In dyeing
(d) In correction of copper deficiency in soil
and animals
(e) Preparation of catalysts

6. Silver bromide (AgBr) Making photographic films
7. Calcium chloride (a) Used as a drying agent
(CaCl ) (b) In freezing mixtures
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(c) Used as food additive
(d) In water treatment plants
(e) As a food preservative

8. Calcium carbonate (a) Plays an important role as a construction
(CaCO ) and building material (marble) or as an
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ingredient in cement
(b) In medicinal industries to manufacture
antacids and tablets
(c) Manufacture of paints, paper, and plastics

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