A solution with a pH of 13 contains more hydroxide ions than a solution with a pH of 11.

Question

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A solution with a pH of 13 is basic and has a higher concentration of hydroxide ions than a solution with a pH of 11, which is also basic but has a lower concentration of hydroxide ions. The pH scale is logarithmic, meaning that each increase of one pH unit represents a tenfold increase in hydrogen ion concentration (and thus a tenfold decrease in hydroxide ion concentration). Therefore, a solution with a pH of 13 has a ten times greater concentration of hydroxide ions than a solution with a pH of 11.

A Solution with a PH of 13 Contains More Hydroxide