Question

Which of the following is a basic solution at 25°C?

a) pH 3
b) pH 7
c) pH 9
d) pH 5

Answer 1

At 25°C, a solution with a pH greater than 6.31 is considered basic. Therefore, pH 9 (option C) is the basic solution.

Step-by-step explanation:

According to the information provided, at 25°C, a solution with a pH greater than 6.31 is considered basic. Therefore, the correct answer is pH 9 (option C).