What does a lower pH value indicate about a solution?

A lower pH value indicates that a solution is acidic. The pH scale ranges from 0 to 14, where a pH of 7 is considered neutral. Any pH value below 7 signifies increasing acidity, meaning the concentration of hydrogen ions (H⁺) in the solution is higher than that in a neutral solution. This increased concentration of hydrogen ions is what defines an acidic solution. Thus, when pH values drop, it reflects a higher acidity and confirms that the solution can taste sour, react with metals, and cause structural changes in certain materials, which are characteristic properties of acids.