Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Acid–alkali indicators
19 practice questions
Practice questions
1–3 of 3 · Hard
Question 1
2 marks · Hard
Answer and see the solution →State the colours shown by phenolphthalein in (i) a strongly acidic solution, and (ii) a strongly alkaline solution.
Question 2
5 marks · Hard
Answer and see the solution →For each pH value below, state whether the solution is strongly acidic, weakly acidic, neutral, weakly alkaline, or strongly alkaline.
(a)[1 mark]pH = 2
(b)[1 mark]pH = 5
(c)[1 mark]pH = 7
(d)[1 mark]pH = 9
(e)[1 mark]pH = 12
Question 3
2 marks · Hard
Answer and see the solution →Describe how you would use universal indicator paper to measure the pH of a solution as accurately as the method allows.