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Which of the following is an acid?

A. water with pH 7
B. lemon
C. soap


Sagot :

Final answer:

Acids have a pH lower than 7, bases have a pH higher than 7. Lemon juice is an example of an acid with a low pH level.


Explanation:

Acid is a solution with a higher hydronium ion concentration than pure water and a pH lower than 7. For example, lemon juice has a pH of approximately 2, making it acidic.


Neutral solutions like distilled water have a pH of 7. Bases have a pH higher than 7, like soap with a pH of 12, placing it on the basic end of the scale.


Understanding pH levels is crucial in identifying whether a substance is acidic, basic, or neutral, as indicated by different pH values.


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