Final answer:
A solution with a pH of 3 has 100 times the concentration of hydrogen ions ([H+]) as a solution with a pH of 5.
Step-by-step explanation:
The pH scale is a logarithmic scale that measures the acidity or alkalinity of a solution. A solution with a pH of 3 has 10 times the concentration of hydrogen ions ([H+]) as a solution with a pH of 4, and 100 times the concentration of hydrogen ions as a solution with a pH of 5.
Therefore, if beer has a pH of 3 and a solution with a pH of 5 has a hydrogen ion concentration of [H+]1, the hydrogen ion concentration in beer is 100 times greater than [H+]1.