A pH of 7 indicates what about a solution?

A pH of 7 indicates that a solution is neutral. The pH scale ranges from 0 to 14, where values below 7 represent acidic solutions, and values above 7 indicate basic (or alkaline) solutions. A pH of exactly 7 is defined as neutral, meaning the concentrations of hydrogen ions (H⁺) and hydroxide ions (OH⁻) are equal in the solution. This is true for pure water at 25°C, where both types of ions are present in a balanced state, leading to no net acidity or basicity. This neutrality is a critical concept in understanding acid-base chemistry, as it serves as a baseline for comparisons of acidity and alkalinity.