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is also known as the concentration. The concentration can be converted to .
Take a sample of nitric acid ##HNO_3## with a molarity of ##0.0032 M##.
The molarity becomes the ##[H^+]## concentration of ##3.2 xx 10^(-3)##.
We know this is the ##[H^+]## concentration because ##HNO_3## is a strong acid since the acid will completely dissociate into ##H^+## and ##NO_3^-##.
To find the ##pH## calculate ##- log[H^+]##
##-log[3.2xx 10^(-3)] = 2.49 = pH##
To find the ##pOH## take the ##pH## value and subtract it from ##14##.
##14 – 2.49 = 11.51 = pOH##
To convert ##pOH## to ##[OH^-]## calculate ##[OH^-]=10^(-pOH)##
##10^(-11.51)= 3.09 xx 10^(-12)=[OH^-]##