In fact, anytime we have a solution with a PH of above seven and we are at room temperature, that means our solution will be a basic solution. So at room temperature, a PH of above seven means the solution is basic. So we have an acidic solution, is a solution in which the PH is below seven. A basic solution is a solution in which the PH is above seven, and a neutral solution solution where the PH is equal to seven. And at that particular moment in time, the concentration of our base, the hydroxide, is equal to the concentration of our acid, our hydrogen ion. So these are the basics you're going to need to use in the next lecture.