Self-Ionisation of Water (Leaving Cert Chemistry): Quizzes

Water molecules spontaneously form ions

$\text{H}^+$ and $\text{OH}^-$

$1.0 \times 10^{-14}$

$K_w = [\text{H}^+][\text{OH}^-]$

$1.0 \times 10^{-7}$ M

$K_w$ increases as temperature rises

$\Delta H = +55.8$ kJ mol$^{-1}$

Heavily towards the left

$[\text{H}^+] > 1.0 \times 10^{-7}$ M

$[\text{OH}^-] > 1.0 \times 10^{-7}$ M

$[\text{OH}^-]$ decreases to maintain $K_w$