And by the way, this 1.10 times ten to negative 14 value is equal to K with the W subscript. So this is equal to K with the W subscript where the W stands for water. And this particular value works at room temperature. Now, what exactly do we mean by an acidic solution? And what exactly do we mean by a basic solution? So an acidic solution is a solution in which the concentration of the hydrogen ion in solution is greater than the concentration of the hydroxide ion.