The pH scale measures the acidity or basicity of a solution. It ranges from 0 (very acidic) to 14 (very alkaline), with lower pH values indicating higher hydronium ion (H3O+) concentrations and higher acidity, and higher pH values indicating higher hydroxide ion (OH–) concentrations and higher alkalinity.
Share
The pH scale measures the acidity or alkalinity of a solution. It quantifies the concentration of hydrogen ions (H⁺) in a solution. The scale ranges from 0 to 14, where a pH of 7 is neutral, values below 7 indicate acidity, and values above 7 indicate alkalinity. Each unit change represents a tenfold difference in hydrogen ion concentration. Lower pH values signify stronger acids, and higher values indicate stronger bases. Interpretation: pH 0-6: acidic, pH 7: neutral, pH 8-14: alkaline. The pH scale provides a logarithmic representation, facilitating a concise expression of the solution’s acid-base nature.