Answer
The concentration of protons of pH 8.5 is $1.0\times10^{-8.5}m$ or $3.2\times10^{-9}m.$
This means it is 32 times less concentrated than pH $7.0$ or $1.0\times10^{-7}$.
Work Step by Step
The pH of a solution is a measurement of the concentration of the $H^{+}$ (Hydrogen ions). It is often referred to as $H_{3}O^{+}$ cations.
The pH of a given solution can be calculated using -ve log base 10 of the $H_{3}O^{+}$ cations.
The concentration of protons of pH 8.5 is $1.0\times10^{-8.5}m$ or $3.2\times10^{-9}m.$
This means it is 32 times less concentrated than pH $7.0$ or $1.0\times10^{-7}$.
