A solution with pH greater than 7 is called what?

A solution with pH greater than 7 is called what?

• A. Base
• B. Acid
• C. Exothermic
• D. Δt

Answer: (A)

pH shows how acidic or basic a solution is. On the common 0–14 scale, 7 is neutral; values below 7 are acidic and values above 7 are basic (also called alkaline). A higher pH means lower hydrogen ion concentration. Bases reduce [H+] in solution, or produce species that raise the pH, so the solution becomes basic. That’s why a solution with pH greater than 7 is called a base. Terms like exothermic describe heat release, and Δt isn’t a measure of acidity, so they don’t apply here.

pH shows how acidic or basic a solution is. On the common 0–14 scale, 7 is neutral; values below 7 are acidic and values above 7 are basic (also called alkaline). A higher pH means lower hydrogen ion concentration. Bases reduce [H+] in solution, or produce species that raise the pH, so the solution becomes basic. That’s why a solution with pH greater than 7 is called a base. Terms like exothermic describe heat release, and Δt isn’t a measure of acidity, so they don’t apply here.