What do you observe when you drop a few drops of acetic acid to a test tube containing:
(a) Phenolphthalein (b) Distilled water (c) Universal indicator (d) Sodium hydrogen carbonate
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Answer:
Acetic acid is a weak acid. The following changes will occur when a few drops of acetic acid are added to the given solutions: i. Phenolphthalein remains colourless, as acetic acid shows a change in colour in basic substances.
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I think (d) is the right answer
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