Which is the correct relation between $pH$, $pOH$, $[H^+]$ and $[OH^-]$ ? i) $pH$ $=$ $\frac{14}{pOH}$ ii) $[H^+]$ $=$ $- log pH$ iii) $[OH^-]$ $=$ $\frac{K_e}{10^{-pH}} $ iv) $pOH$ $ =$ $- log(\frac{K_e}{[H^+]})$
a) i) b) ii) c) iii) d) iv)
The correct answer is: c) iii)$[OH^-]$ $ =$ $ \frac{K_e}{10^{-pH}} $