The product [H+]×[OH-] is a constant equal to Kw. What is Kw at 25°C?

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Multiple Choice

The product [H+]×[OH-] is a constant equal to Kw. What is Kw at 25°C?

Explanation:
The product [H+]×[OH−] for water at a given temperature is a constant, called Kw. At 25°C this constant is 1.0 × 10^-14. In pure water, [H+] and [OH−] are equal, each 1.0 × 10^-7 M, so their product is (1.0 × 10^-7)(1.0 × 10^-7) = 1.0 × 10^-14. This temperature-specific constant explains why neutral water has pH 7 (pH + pOH = 14 at 25°C).

The product [H+]×[OH−] for water at a given temperature is a constant, called Kw. At 25°C this constant is 1.0 × 10^-14. In pure water, [H+] and [OH−] are equal, each 1.0 × 10^-7 M, so their product is (1.0 × 10^-7)(1.0 × 10^-7) = 1.0 × 10^-14. This temperature-specific constant explains why neutral water has pH 7 (pH + pOH = 14 at 25°C).

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