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Acids, alkalis and titrations

Acids, alkalis and titrations

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Question 28

This question is about the behavior of hydrogen chloride in different solvents.

A piece of zinc foil is added to hydrogen chloride in three separate experiments under different conditions:

ExperimentConditionsObservations
1Hydrogen chloride gasNo visible change
2Hydrogen chloride dissolved in waterThe zinc gets smaller and bubbles are seen
3Hydrogen chloride dissolved in methylbenzeneNo visible change
a.

Write the formulae of two ions formed in the solution produced in Experiment 2.

  • Positive ion
  • Negative ion
[2]
b.

Identify the gas formed in Experiment 2 and describe a chemical test for it.

  • Gas
  • Test
[2]
c.

Silver nitrate solution and dilute nitric acid are added to the solution produced in Experiment 2.

State the observation and name the substance responsible for this observation.

[2]
d.

Explain why dilute nitric acid is added.

[1]
e.

Explain why there is no reaction in Experiment 3.

[2]
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.

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