AP BIOLOGY

Detailed explanation-1: -pH Definition: a figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values are more acid and higher values more alkaline. The pH is equal to −log10 c, where c is the hydrogen ion concentration in moles per litre. Hence pH 2 is 1000 times stronger than pH 5.

Detailed explanation-2: -For example a pH of 2 is 10 times more acidic than a pH of 3 and 1000 times more acidic than a pH of 5. A pH of 11 is 10 times more alkaline than a pH of 10. So values above 7 indicate alkalinity which increases as the number increases, 14 being the most alkaline.

Detailed explanation-3: -The acid with pH = 2 is a stronger acid.

Detailed explanation-4: -Hence the solution with pH=2 is 10000 time more acidic than a solution with pH=6.

Detailed explanation-5: -The pH scale is logarithmic and as a result, each whole pH value below 7 is ten times more acidic than the next higher value.