As the pH value increases from 7 to 14, it represents an increase in the concentration of OH– ions in the solution, indicating an increase in the strength of the alkali.
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As a solution becomes more alkaline or basic, the pH value increases. The pH scale ranges from 0 to 14, with values above 7 indicating alkalinity. A pH of 7 is neutral, and as the pH rises, the solution becomes progressively more basic. For example, a pH of 8 is slightly basic, while a pH of 14 represents a strongly alkaline solution. The increase in pH signifies a higher concentration of hydroxide ions (OH⁻) relative to hydrogen ions (H⁺), reflecting the solution’s increasing alkalinity. The pH scale provides a logarithmic representation, with each unit change representing a tenfold difference in ion concentration.