Distinguish potable water from chemically pure water.

Potable water is defined as water that is safe for human consumption, while chemically pure water refers to water that contains only H2O molecules without any impurities. Potable water may contain dissolved substances, such as minerals, which can be beneficial for health, whereas chemically pure water is often used in laboratory settings where the presence of any contaminants could affect results. Understanding this distinction is crucial for ensuring that water sources meet safety standards for drinking and public health.