Question

phenolphthalein is not suitable for acid test.why?​

Answer 1

Answer:

the statement is true

Explanation:

phenolphthalein changes colour from transparent to pink in a basic solution.

but in an acidic or a neutral solution it does not change colour.

so if you put an unknown solution in phenolphthalein and it does not change colour then you cannot infer if it is acidic or neutral in nature.

hence it is waste for acid test.

that is why universal solution or ph papers are used instead of phenolphthalein.

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