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When we added vinegar to the cabbage water, it turned a red color. This indicated that the vinegar and cabbage water solution was in the acidic range, between 0.0 and 7.0 on the pH scale. Typically, vinegar has a pH of about 3.0.
When we added baking soda to the cabbage water, its color turned a darker blue. This indicates that the baking soda and cabbage water is in the basic range, with a pH between 7.0 and 14.0. Typically, dissolved baking soda has a pH of at least 8.0.
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