Acidic
A solution where blue litmus paper turns
red when placed in the solution.
A solution with a pH of 5.
A solution with an [OH$^-$] of $10^{-13}$ M.
A solution where a universal indicator turns
the solution orange.
Basic
A solution where red litmus paper turns
blue when placed in the solution.
A solution where a universal indicator turns
the solution blue.
Neutral
A solution where red litmus paper remains
red when placed in the solution.
A solution where blue litmus paper remains
blue when placed in the solution.
A solution with a pH of 7.
A solution with an [OH$^-$] of $10^{-7}$ M.