A solution with a pH below 6.5 is classified as?

A solution with a pH below 6.5 is classified as acidic because pH values are a measure of the hydrogen ion concentration in a solution. The pH scale ranges from 0 to 14, with lower values indicating higher acidity. A pH of 7 is considered neutral, typically found in pure water. Solutions with a pH less than 7 exhibit properties of acids, such as tasting sour and turning blue litmus paper red. As the pH decreases below the neutral point, the acidity increases, thus confirming that a pH lower than 6.5 indeed classifies the solution as acidic.