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. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.

Detailed explanation-2: -The salt solution which has strong acid and weak bases is acidic in nature. They have a pH of less than 7. They have weak bases such as Ammonium hydroxide ( NH 4 OH ) and strong acids such as Sulphuric acid ( H 2 SO 4 ) and Hydrochloric acid.

Detailed explanation-3: -Hence, the pH of all substances is less than 7 which denotes them as acidic in nature.

Detailed explanation-4: -Any pH below 7 is acidic, whilst any pH above 7 is termed alkaline. Water molecules have the chemical formula H2O. However, these molecules are capable of splitting up slightly in solution, in H+ and OH– (hydroxide) ions. In a neutral solution, the concentrations of these two ions are equal.

Detailed explanation-5: -The pH value of a solution directly measures the concentration of hydrogen ions (H+) in the solution. Acids have a large H+ concentration, which translates to a small pH value. Bases have very little H+. Basic solutions have large pH values-greater than pH 7.