The Student Room Group
Reply 1
isnt it always 14
i thinks pkW = 14 - pOH??

not too sure tough
Reply 3
pKw is -log of Kw....? Kw is always 1x10^-14 at RTP
Reply 4
so it is 14 yea...pKw = pH + pOH
Reply 5
TerrorSquad
i thinks pkW = 14 - pOH??

not too sure tough


thats pH uve calculated there :biggrin:
Reply 6
mackin boi
so it is 14 yea...pKw = pH + pOH



Kw = [H+] * [OH-]

So to find pH (of a base of known conc)....

[H+] = Kw / [OH-]

Then pH = -log [H+]

You just assume that of all the OH- ions in solution, they all come from the base and none come from water dissociating
Reply 7
pKw = -log Kw
Kw = 10 ^-pKw