Answer: A solution with a pH of 7 must be neutral.
Explanation:
If a solution has pH of 7 then the concentration of [tex]H^+[/tex] ions and [tex]OH^{-}[/tex] ions will be equal.
Thus, the concentration for both [tex]H^+[/tex] ions and [tex]OH^{-}[/tex] ions will be [tex]1 \times 10^{-7}[/tex]. Generally, pH at 7 is considered as neutral.
Thus, it is concluded that a solution with pH of 7 must be neutral.
