OnlineCBT
Chemistry · EQUILIBRIUM
हिन्दीAt \( 298\text{ K} \), pure water has a density of \( 1000\text{ g/L} \) and molar mass of \( 18.0\text{ g/mol} \). If the concentration of \( \text{H}^+ \) ions is \( 1.0 \times 10^{-7}\text{ M} \), what is the fraction of water molecules that are dissociated into ions?
Correct answer · Option 1
\( 1.8 \times 10^{-9} \)
Explanation
Molarity of pure water \( [\text{H}_2\text{O}] = \frac{1000}{18} = 55.55\text{ M} \). Ratio of dissociated water \( = \frac{10^{-7}}{55.55} \approx 1.8 \times 10^{-9} \).
