What happens to the pH of pure water when a few drops of lemon juice are added?
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A.
The pH increases
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B.
The pH remains the same
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C.
The pH becomes neutral
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D.
The pH decreases
Correct Answer:
D. The pH decreases
Explanation:
The correct answer is The pH decreases. Pure water has a neutral pH of 7. When lemon juice is added, the concentration of hydrogen ions increases because lemon juice contains citric acid, which typically has a low pH between 2 and 3. In chemistry, adding an acid to a neutral liquid makes the overall solution more acidic, which results in a lower numerical value on the pH scale. Therefore, the addition of even a small amount of lemon juice will shift the water's pH downward from neutral toward the acidic range.
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