A solution has [OH-] = 3.5 × 10-6. Based on that, what must be true about this solution?
A. It is an acidic solution.
B. It is a strong base.
C. It is a strong acid.
D. It is a basic solution.
Neutral solutions have (H^+)=(OH^-) = 1E-7.
To determine what must be true about this solution, we need to look at the concentration of hydroxide ions ([OH-]).
In general, when the concentration of hydroxide ions is greater than the concentration of hydrogen ions ([H+]), the solution is considered basic. When the concentration of hydrogen ions is greater than the concentration of hydroxide ions, the solution is considered acidic.
Given that the concentration of hydroxide ions ([OH-]) in this solution is 3.5 × 10^-6, we cannot determine the concentration of hydrogen ions or compare it to the concentration of hydroxide ions. Therefore, we cannot conclude whether the solution is acidic or basic.
So, based on the information provided, none of the options A, B, C, or D can be determined as the correct answer.