We must understand that the lower the pH of a substance, the higher the concentration of H+ ions and the lower the concentration of OH- ions. To better understand the issue.....
Do you know what pH means?
The acronym pH stands for Potential Hydrogen, and consists of an index that indicates the acidity, neutrality or alkalinity of any medium.
The pH is a characteristic of all substances determined by the concentration of Hydrogen ions (H+). The lower the pH of a substance, the higher the concentration of H+ ions and the lower the concentration of OH- ions.
The pH scale can vary from 0 to 14, and the lower the pH index of a substance, the more acidic this substance will be, see the pH of some substances:
Answering the question
The statement is correct, the lower the PH the higher the concentration of H+, so a substance that has pH 6 has more H+ than a solution that has PH 9.
The pH value is directly related to the amount of hydrogen ions in a solution, there are also methods that it is possible to measure the pH of a substance directly with a paper or electronic phmeter.
Learn more about pH in https://brainly.com/question/491373?referrer=searchResults
