The ionization constant of water at a temperature above 25°C is 3.1 × 10⁻¹⁴. What is the pH of pure water at this temperature?
a. 13.55
b. 6.75
c. 7.00
d. 7.75
a. 13.55
b. 6.75
c. 7.00
d. 7.75