Answer: 1, 13
Explanation:
pH can be define as the measurement of the hydrogen ion concentration in the solution. It is the measure of the acidity or alkalinity of a solution. The pH scale usually ranges from 0 to 14. Aqueous solutions at 25°C with a pH at 7 considered as neutral, less than 7 are acidic, and a pH greater than 7 are basic or alkaline.
A very acidic pH is 1, and the very basic pH is 13.
