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Acids

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Question 95

A manufacturer of dry bath bombs uses anhydrous citric acid powder as one of the key ingredients.

To verify the acidic nature of a fresh batch of this dry powder, a quality control technician proposes the following method:

  • Step 1: Take a piece of dry, red litmus paper.
  • Step 2: Press the dry litmus paper firmly into the dry citric acid powder.
  • Step 3: Observe any change in colour of the litmus paper.

This test will not work.

Give two changes that must be made to this method for the test to successfully show that citric acid is acidic.

[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