00:01
In answering this question, we have to recall that ph is equal to negative log, the concentration of the h3 or positive iron.
00:09
What this means is that concentration is then equal to 10 to the power negative ph.
00:15
We also know that kw, which is equal to 10 to the power negative 1 -4, is equal to the concentration of the h -3 or positive iron multiplied by the concentration of the o .h -ions.
00:28
So what this means is the concentration of the oh ions, it is going to be 10 to the power negative 1 .4 divided by the concentration of the h3o positive ion.
00:40
Now using this approach, if we are looking at the first one, where we've got the lemon juice, we are saying the concentration of the h .o3 plus ions, it is equal to 10 to the power negative ph, which is 10 to the power negative 2 .2, which is equal to 6 by 10 to the power negative 3 in units of polarity.
00:58
Then the concentration of the oh ions, this is going to be 10 to the power negative 1 4 divided by 6 by 10 to the power negative 3...