Determine the [OH−] in a 0.42 M solution of HClO4
Perchloric acid is completely inoinzed in water, so H+=.42M
but conc H+ and OH-= 10^-14, so OH concentration= 10^-14/.42= you do it, pretty small.
but conc H+ and OH-= 10^-14, so OH concentration= 10^-14/.42= you do it, pretty small.