Answer:
A pH of 10 represents a solution with the highest concentration of hydroxide ions (OH-).
Step-by-step explanation:
The pH scale is used to measure the acidity or basicity of a solution, with a pH of 7 being neutral. A pH less than 7 is considered acidic and a pH greater than 7 is considered basic. The pH is calculated using the negative logarithm of the hydrogen ion concentration (H+). So, a pH of 10 means that the H+ concentration is 10^-10 moles/L, which is very low. Therefore, the solution is very basic, and has a high concentration of hydroxide ions (OH-).