Ionic Equilibrium
2.0 $pH$ Scale
2.0 $pH$ Scale
Sorenson in $1909$ introduced a logarithmic scale called ${\kern 1pt} pH$ scale to measure the acidic and basic natures of acids and bases respectively. For dilute solutions ${\kern 1pt} pH$ is given as
$${\kern 1pt} pH = - \log \left[ {{H^ + }} \right] = \log \frac{1}{{\left[ {{H^ + }} \right]}}$$
Conclusion: If ${\kern 1pt} pH$ = $x$ then $\left[ {{H^ + }} \right]$ = ${10^{ - x}}$ or vice versa i.e., If $\left[ {{H^ + }} \right]$ = ${10^{ - x}}$ then ${\kern 1pt} pH$ = $x$
