Skip to content

Course home

Acids, alkalis and titrations

Acids, alkalis and titrations

EasyMedium
1234
Question 4

Part of the pH scale is shown below:

pH 1 (strongly acidic) ⟷ pH 7 (neutral) ⟷ pH 14 (strongly alkaline) \text{pH 1 (strongly acidic) } \longleftrightarrow \text{ pH 7 (neutral) } \longleftrightarrow \text{ pH 14 (strongly alkaline)} pH 1 (strongly acidic) ⟷ pH 7 (neutral) ⟷ pH 14 (strongly alkaline)

Five chemical experiments are described below:

  • A: calcium chloride (a neutral salt) is dissolved in pure water
  • B: sulfur dioxide gas is dissolved in pure water
  • C: potassium hydroxide solution is neutralised by adding dilute hydrochloric acid
  • D: excess potassium hydroxide solution is added to a weakly acidic solution
  • E: ammonia gas is dissolved in pure water

The table below shows the pH at the start and at the end of these five experiments. Complete the table by determining the correct experiment letter (A, B, C, D, or E) for each of the empty boxes.

pH at startpH at endExperiment
514D
77
710
147
74
[4]
Markscheme

Acids, alkalis and titrations Questions

  1. IGCSE
  2. /Chemistry
  3. /Acids, alkalis and titrations

39 exam-style questions on Edexcel IGCSE Chemistry Acids, alkalis and titrations. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank