Which statement best describes the pH of pure water
a. It is neutral because the concentration of hydronium ions equals that of hydroxide ions
b. it is neutral because the pure liquid contains neither hydronium ions not hydroxide ions
c. it is acidic because it has a hydronium ion concentration of 1.0 x 10-7 M
d. its basic because it has a hydroxide ion concentration of 1.0 x 10-7 M
