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