The pH of a neutral solution is 7. Thus the range of acid pH values extends from 0 to 7, and that of alkaline values from 7 to 14. Neither are perfect descriptions. Simply stated, pH tells us whether a solution is acid, alkaline or neutral. It does not tell us how much acid or alkali is present.
Life depends upon it.
For instance, human blood is basic with a pH between 7.3 and 7.5. If the pH of blood drops below 7.3, acidosis occurs. If the blood pH rises above 7.5, alkalosis occurs. Death will occur if blood pH goes below 7.0 or above 7.8. Our human existence depends upon a balanced and buffered blood pH. The pH of a cleaning product does not signify cleaning performance or strength.