Two clear solutions are placed in separate beakers. the first solution has pH 4, and the second one is not known. The two solutions are mixed and the pH of the mixture is 5. Thus, the second solution must have been

Two clear solutions are placed in separate beakers. the first solution

1.	Two clear solutions are placed in separate beakers. the first solution has pH 4, and the second one is not known. The two solutions are mixed and the pH of the mixture is 5. Thus, the second solution must have been
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