Answer:
A. True.
Explanation:
The concentration of an acid or base refers to the amount of acid or base that are dissolved in a given solution. If the concentration of acid or base ion i. e. H+ or OH-, is higher, the solution is concentrated solution. If the concentration of acid or base ion i. e. H+ or OH-, is low, the solution is dilute solution. So concentration of acid and base is depend on the ions that are dissolved in the solution.