What is the pH value of neutral water at room temperature?

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Multiple Choice

What is the pH value of neutral water at room temperature?

Explanation:
pH tells you how acidic or basic a solution is by looking at the hydrogen ion concentration. In pure water at room temperature, water molecules split a little to produce equal amounts of H+ and OH−. When [H+] equals [OH−] at about 1 × 10−7 moles per liter, the pH, defined as -log10[H+], comes out to 7. That makes neutral water around room temperature neutral with a pH of 7. Temperature matters, too, because Kw shifts with temperature; at ~25°C it yields equal concentrations, giving pH 7. Values below 7 indicate acidity, while values above 7 indicate basicity, so 7 is the neutral point.

pH tells you how acidic or basic a solution is by looking at the hydrogen ion concentration. In pure water at room temperature, water molecules split a little to produce equal amounts of H+ and OH−. When [H+] equals [OH−] at about 1 × 10−7 moles per liter, the pH, defined as -log10[H+], comes out to 7. That makes neutral water around room temperature neutral with a pH of 7. Temperature matters, too, because Kw shifts with temperature; at ~25°C it yields equal concentrations, giving pH 7. Values below 7 indicate acidity, while values above 7 indicate basicity, so 7 is the neutral point.

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