Like all equilibrium constants, the value of K_w depends on temperature. At body temperature (37 °C), K_w = 2.4×10⁻¹⁴. What are the [H₃O⁺] and pH of pure water at body temperature?

• A. [H₃O⁺] = 2.4×10⁻¹⁴; pH = 13.62
• B. [H₃O⁺] = 1.5×10⁻⁷; pH = 6.82
• C. [H₃O⁺] = 5.5×10⁻⁷; pH = 6.26
• D. [H₃O⁺] = 1.0×10⁻⁷; pH = 7.00