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Question
Two solutions A and B have pH values of 3.0 and 9.5 respectively. Which of these will turn litmus solution from blue to red and which will turn phenolphthalein from colourless to pink?
Solution
Solution A, being acidic, with a pH value of 3.0, will turn litmus solution from blue to red, and solution B, being basic, with a pH value of 9.5, will turn phenolphthalein from colourless to pink.
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