At 25°C, what is the pH of pure water?
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7
Pure water is neutral because its hydrogen-ion and hydroxide-ion concentrations are equal. At 25°C, its pH is approximately 7; the neutral pH changes with temperature. At 25°C, aqueous solutions with pH above 7 are basic, also called alkaline.
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- What pH value does pure water have at a temperature of 25°C?