078 M at 25 °C.
- Use the ion product constant for water at 25 °C, which is \( K_w = 1.0 \times 10^{-14} \).
- The relationship between [H+] and [OH-] is given by \( K_w = [H^+] \times [OH^-] \).
- Substitute the given [H+] into the equation: \( 1.0 \times 10^{-14}
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