* pH and Hydrogen Ion Concentration: pH is a measure of the acidity or alkalinity of a solution. It's based on the concentration of hydrogen ions (H+). A lower pH indicates a higher concentration of hydrogen ions, meaning the solution is more acidic.
* Comparing Solutions A and B:
* Solution A has a pH of 2.
* Solution B has a pH of 4.
Since solution A has a lower pH than solution B, it has a higher concentration of hydrogen ions.
Specifically:
* A difference of 2 pH units means the hydrogen ion concentration in solution A is 100 times greater than in solution B. This is because the pH scale is logarithmic.
