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a. Measuring the pH of waterThe river water under natural conditions that have not been polluted stretch of pH 6,5 - 8.5. Because of pollution, water pH can be lower than 6.5 or higher than 8.5. Organic materials are usually organic causes water to become more acidic conditions. Lime causes water conditions become more alkaline (base). Thus, changes in the pH of the water depends on the material pencemarnya.
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