Salts

Which of the following statements best define the term ‘salt’?

• Salt is formed when metal reacts with an alkali.

• Salt contains sodium ions and chloride ions.

• Salt is formed from a weak Van der Waals’ forces of attraction.

• Salt is formed when the hydrogen ions in an acid is replaced by metal or ammonium ions.

Which of the following reaction can produce sodium nitrate and water?

• Sodium chloride solution and nitric acid.

• Sodium sulphate solution and nitric acid.

• Sodium hydroxide solution and nitric acid.

• Sodium and dilute nitric acid.

Which of the following is true about the soluble and insoluble salt?

• A

• B

• C

• D

Which of the following salts can be prepared by using double decomposition method?

• Silver chloride

• Barium nitrate

• Sodium carbonate

• Lead (II) nitrate

Which of the following are the physical characteristics of salt crystal?

I They have similar size.

II They have fixed angle.

III They have fixed geometrical shapes.

IV They have flat surface, straight edges and sharp angles.

• I, II and III

• I, II and IV

• I, III and IV

• II, III and IV

Which of the following substances can be used to prepare copper (II) chloride by reaction with hydrochloric acid?

I Copper (II) oxide

II Copper (II) nitrate

III Copper (II) carbonate

IV Copper (II) hydroxide

• I, II and III

• I, II and IV

• I, III and IV

• II, III and IV

Which of the following reagents are suitable to prepare lead (II) sulphate salt?

• Lead (II) oxide and sulphuric acid.

• Lead (II) carbonate and sulphuric acid.

• Lead (II) nitrate and potassium sulphate.

• Lead (II) chloride and sodium sulphate.

Which of the following mixture will react to produce an aqueous zinc nitrate solution?

I Zinc carbonate and dilute nitric acid.

II Zinc oxide and dilute nitric acid.

III Zinc oxide and potassium nitrate solution.

IV Zinc and aqueous sodium nitrate solution.

• I and II

• II and III

• III and IV

• I and IV

What is the volume of alkali needed to produce 0.745 g of salt?

[Relative atomic mass: K = 39, H = 1, O = 16, Cl = 35.5]

• 5 cm³

• 10 cm³

• 15 cm³

• 20 cm³

6.8 g of calcium carbonate reacts with 50 cm³ of 1 mol dm^–3 hydrochloric acid, HCl. Determine the mass of calcium carbonate that has not taken part in the reaction.

[Relative atomic mass: Ca = 40, C = 12, O = 16]

• 2.5 g

• 3.8 g

• 4.3 g

• 5.5 g