If a solution has pH 2.5 then is it acidic or alkaline and what are the concentrations of H+ and OH- ions?
The solution is acidic with:
#10^(-2.5) ~~ 3.2 xx 10^(-3)#or #0.32%#
#10^(-11.5) ~~ 3.2 xx 10^(-12)#
In a neutral solution the concentration of H+ ions (actually
As the concentration of H+ ions increases, the concentration of OH- ions decreases in proportion and vice versa.
As a result, the product of the concentrations will always be about
We call solutions with more H+ than OH- acidic.
pH is minus the common (base
Hence pH + pOH = 14.
If our solution has pH 2.5, then that means that the concentration of H+ ions is
pOH will be