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In order to test the acidity of a substance, various techniques can be used. pH indicators, pH meters, etc. can show that a substance is acidic (or basic). In the case of vinegar, simply dipping a piece of blue litmus paper in it will show that it is acidic. The paper will change from blue to red, indicating that the substance in question is in fact an acid. The primary compound in vinegar is acetic acid, which gives vinegar its acidity.

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16y ago

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