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Which of the following measurements would be considered alkaline?

  1. 6.5

  2. 7.0

  3. 7.3

  4. 8.0

The correct answer is: 6.5

The correct measurement that would be considered alkaline is 8.0. In the context of pH, any value above 7 indicates an alkaline or basic solution. A measurement of 7.0 is neutral, while values below 7 indicate acidity. As such, the values of 6.5 and 7.0 do not fall into the alkaline range. An understanding of the pH scale is crucial here. It ranges from 0 (highly acidic) to 14 (highly alkaline), with 7 as the neutral midpoint. Therefore, measurements like 7.3 and 8.0 clearly indicate a shift into alkaline territory.