WAEC Chemistry 2011 Objective — Question 28
Question 28 of 50 from the West African Examinations Council (WAEC) Chemistry 2011 Objective paper, with the correct answer and a full explanation.
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The colour of phenolphthalein indicator in alkaline solution at the end-point of an acid-base titration is
- A. A. colourless
- B. B. orange
- C. C. pinkCorrect
- D. D. yellow
Explanation
Phenolphthalein is colourless in acidic medium, pale pink in neutral medium and pink/red in alkaline medium.
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