Salts and neutralization — KCSE Chemistry

KCSE Chemistry · 57 practice questions · 4 syllabus objectives

25 easy25 medium7 hard

What You'll Learn

Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.

Define salts and classify them as normal, acidic or basic salts with examples

Write ionic and molecular equations for neutralisation reactions

Describe methods of preparing soluble and insoluble salts with appropriate equations

Salts and neutralization

Sample Questions

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easySHORT ANSWER4 marks

Identify two methods for preparing an insoluble salt, including the relevant chemical equations. (4 marks)

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Part (a) — 4 marks

Method 1: Precipitation - Mixing solutions of barium chloride and sodium sulfate: BaCl₂ + Na₂SO₄ → BaSO₄ (s) + 2NaCl (2 mks)

Method 2: Reaction of an acid with a carbonate - Reacting hydrochloric acid with silver carbonate: 2HCl + Ag₂CO₃ → 2AgCl (s) + H₂O + CO₂ (2 mks)

easySHORT ANSWER4 marks

Explain how the neutralisation of hydrochloric acid with calcium carbonate can be represented, including the chemical equations involved. (4 marks)

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Part (a) — 2 marks

Neutralisation involves the reaction of hydrochloric acid with calcium carbonate (1 mk)

The products formed are calcium chloride, water, and carbon dioxide (1 mk)

Part (b) — 2 marks

Molecular equation: 2 HCl + CaCO3 → CaCl2 + H2O + CO2 (1 mk)

Ionic equation: 2 H+ (aq) + CO3^2- (aq) → H2O (l) + CO2 (g) (1 mk)

easySHORT ANSWER4 marks

Define the neutralisation reaction between nitric acid and sodium hydroxide, and write both the ionic and molecular equations for this reaction. (4 marks)

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Part (a) — 2 marks

Neutralisation is the reaction between an acid and a base to form a salt and water (1 mk)

In this case, nitric acid reacts with sodium hydroxide (1 mk)

Part (b) — 2 marks

Molecular equation: HNO3 + NaOH → NaNO3 + H2O (1 mk)

Ionic equation: H+ (aq) + OH- (aq) → H2O (l) (1 mk)

Define a normal salt and give two examples. (3 marks)

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Why Practise Salts and neutralization?

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Salts and neutralization — KCSE Chemistry

What You'll Learn

Sample Questions

+54 More Questions

Why Practise Salts and neutralization?

KNEC Aligned

Detailed Marking Schemes

Track Your Mastery

Master Salts and neutralization for KCSE