Which statement is true about pH values above 7?

Which statement is true about pH values above 7?

• A. They are acidic
• B. They are neutral
• C. They are base (alkaline)
• D. They are highly acidic

Answer: (C)

On the pH scale, acidity and basicity are determined by hydrogen ion concentration: lower pH means more acidic, higher pH means more basic. A pH of 7 is neutral. Values above 7 indicate a base (alkaline) because the solution has relatively fewer hydrogen ions and more hydroxide ions. So, the true statement is that pH values above 7 are base (alkaline). In contrast, pH below 7 is acidic, and pH equal to 7 is neutral; “highly acidic” would correspond to pH well below 7, not above 7.

On the pH scale, acidity and basicity are determined by hydrogen ion concentration: lower pH means more acidic, higher pH means more basic. A pH of 7 is neutral. Values above 7 indicate a base (alkaline) because the solution has relatively fewer hydrogen ions and more hydroxide ions. So, the true statement is that pH values above 7 are base (alkaline). In contrast, pH below 7 is acidic, and pH equal to 7 is neutral; “highly acidic” would correspond to pH well below 7, not above 7.