Strong bases have a pH of ______ and above.

Strong bases have a pH of ______ and above.

• A. 11.5
• B. 12.5
• C. 13.0
• D. 14.0

Answer: (B)

Strong bases raise pH to very basic levels because they dissociate completely in water, producing a high concentration of hydroxide ions. The pH scale runs from 0 to 14, with 7 being neutral; values above 7 indicate basic solutions, and higher numbers reflect stronger basicity at a given concentration. In many introductory contexts, a practical lower bound is pH 12.5 for what’s considered a strong base. This makes 12.5 and above the best choice because it captures the minimum pH level typically used to categorize bases as strong for teaching purposes. Values like 13.0 or 14.0 describe strong-base solutions at certain concentrations but don’t define the minimum threshold, while 11.5 is too low to indicate strong base behavior.

Strong bases raise pH to very basic levels because they dissociate completely in water, producing a high concentration of hydroxide ions. The pH scale runs from 0 to 14, with 7 being neutral; values above 7 indicate basic solutions, and higher numbers reflect stronger basicity at a given concentration. In many introductory contexts, a practical lower bound is pH 12.5 for what’s considered a strong base. This makes 12.5 and above the best choice because it captures the minimum pH level typically used to categorize bases as strong for teaching purposes. Values like 13.0 or 14.0 describe strong-base solutions at certain concentrations but don’t define the minimum threshold, while 11.5 is too low to indicate strong base behavior.