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Acids

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Question 153

An industrial process produces anhydrous hydrogen chloride (HClHClHCl) gas as a waste product.

A student is given a sample of this dry gas to test.

The student suggests the following method to test for the hydrogen chloride gas:

  • Step 1: Take a piece of dry, red litmus paper.
  • Step 2: Place the dry litmus paper into the dry gas sample.
  • Step 3: Observe any change in colour of the litmus paper.

This test for hydrogen chloride will not work.

Give two changes that should be made to this test for it to work.

[2]

Acids Questions

  1. GCSE
  2. /Chemistry
  3. /Acids

Practise Edexcel GCSE Chemistry Acids with exam-style questions for Foundation and Higher tier. 276 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

Question bank