Universal indicator added to an unknown solution turns orange. The solution is MOST likely to be:

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Question

Universal indicator added to an unknown solution turns orange. The solution is MOST likely to be:

Accepted Answer

Vinegar, which is a weak acid — Award 1 mark. Orange corresponds to a pH of about 4 to 5, which is mildly acidic. A strong alkali gives purple, and distilled water and salt solution are both neutral and give green.

Answer

Sodium hydroxide, which is a strong alkali

Answer

Vinegar, which is a weak acid

Answer

Concentrated common salt solution

Answer

Pure distilled water

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