AP BIOLOGY

Detailed explanation-1: -pH is a measure of how acidic/basic water is. The range goes from 0-14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base.

Detailed explanation-2: -Hence a range of 0 to 14 provides sensible (but not absolute) “bookends” for the scale. One can go somewhat below zero and somewhat above 14 in water, because the concentrations of hydronium ions or hydroxide ions can exceed one molar. Figure 1 depicts the pH scale with common solutions and where they are on the scale.

Detailed explanation-3: -The pH scale measures how acidic an object is. Objects that are not very acidic are called basic. The scale has values ranging from zero (the most acidic) to 14 (the most basic). As you can see from the pH scale above, pure water has a pH value of 7.

Detailed explanation-4: -The pH scale typically stretches from zero to 14, passing through a neutral pH7 (freshly distilled water). Strong acids have a low pH, while alkaline chemicals, such as bleach and liquid drain cleaner, have a high pH.