What classification is given to any body substance or solution with a pH value between 7.1 and 14?

A body substance or solution with a pH value between 7.1 and 14 is classified as alkaline, which is synonymous with being basic. The pH scale measures the acidity or basicity of a solution, where values less than 7 indicate acidity, a value of 7 indicates neutrality, and values greater than 7 indicate basicity. Therefore, a pH value in the range of 7.1 to 14 signifies that the substance has more hydroxide ions than hydrogen ions, characteristic of alkaline solutions. This classification is important in many biological and chemical contexts, as it can influence reactions, solubility, and the behavior of various substances.

In contrast, acidic solutions have pH values below 7, neutral solutions have a pH of exactly 7, and while basic and alkaline are often used interchangeably, "basic" specifically describes substances with a pH above 7, reinforcing the understanding that a solution between 7.1 and 14 reflects basic or alkaline characteristics.