Question

3.6. predict whether a solution has a high or low concentration of free hydrogen ions by using its ph number. pure water has a neutral ph of 7 and no free h+ ions. true false

Explanation:

Pure water has a neutral pH of 7, but it does have a small number of free $H^{+}$ and $OH^{-}$ ions due to auto - ionization. The auto - ionization of water is given by the equation $H_2O
ightleftharpoons H^{+}+OH^{-}$, and at 25°C, the concentration of $H^{+}$ ions in pure water is $1\times10^{-7}\ mol/L$.

Answer:

False