Final answer:
Pure liquid water is neutral with a pH of 7 because it has an equal concentration of hydrogen ions (H+) and hydroxide ions (OH-).
Step-by-step explanation:
Pure liquid water is described as neutral because its pH is 7. The pH scale ranges from 0 to 14, with 7 being considered neutral. A pH of less than 7 is acidic, and a pH greater than 7 is alkaline/basic. Since water has an equal concentration of hydrogen ions (H+) and hydroxide ions (OH-), it is neither acidic nor alkaline, thus being neutral.
Learn more about water pH