Self-Ionisation of Water (HSC SSCE Chemistry): Flashcards

Water reacting with itself to produce ions

Can act as both an acid and a base

$K_w$

$1.0 \times 10^{-14}$ (mol L$^{-1}$)$^2$

$K_w = [\text{OH}^-][\text{H}_3\text{O}^+]$

$1.0 \times 10^{-7}$ mol L$^{-1}$

7 (neutral)

$[\text{H}_3\text{O}^+] > [\text{OH}^-]$

$[\text{H}_3\text{O}^+] < [\text{OH}^-]$

$[\text{H}_3\text{O}^+] = \frac{K_w}{[\text{OH}^-]}$