You are handed a colorless liquid sample and asked to determine if it is an acid or base using at least two simple tests. Explain what you would do and expect to observe for each possibility

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You are handed a colorless liquid sample and asked to determine if it is an acid or base using at least two simple tests. Explain what you would do and expect to observe for each possibility

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kumaripoojavt kumaripoojavt · Answer 1 · 2025-04-02T00:49:55-04:00

Litmus and phenolphthalein indicators should be used to observe the expect each possibility.

What are indicators?

Indicators are those substances which tell us whether a substance is acidic or basic by a change in colour.

A litmus test is used in chemistry to determine if a solution is acidic or basic using litmus or litmus paper.

Litmus comes from certain species of lichens. Litmus will turn blue when exposed to a base and red when exposed to an acid.

Phenolphthalein is an indicator — a chemical which changes colour depending on whether it meets an acid or a base.

It turns purple if it meets something basic, such as ammonia; it stays colourless if it meets an acid like vinegar or a neutral substance like water.

Hence, litmus and phenolphthalein indicators should be used to observe the expect each possibility.

Learn more about indicators here:

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