The pH of the cytosol of muscle cells is 6.8. After a brief and intense effort, following the production of lactic acid, there are 1.5 times as many hydronium ions. What is then the $pH$?
$pH$ $=$ $6.8$ $[H_3O^+]$ $=$ $10^{-6.8}\frac{mol}{L}$ After: $[H_3O^+]$ $=$ $3\cdot10^{-6.8}\frac{mol}{L}$ $pH$ $=$ $-log(3\cdot10^{-6.8})$ $=$ $6.3$
