00:01
So today, we've been given a thin layer chromatography plate, or a chromatogram that is developed.
00:07
All right? and so, we've been told a few things about this plate.
00:10
First, that the solvent has traveled six centimeters, and substance c has traveled four, substance b has traveled three, and substance a has traveled two.
00:20
All right? and we're asked to calculate the rf value.
00:24
And this is the retention of these substances, all right? and the rf value is equal to the distance that the substances have traveled over the distance that the solvent has traveled.
00:43
So now, using this formula, let's calculate the rf value for each of the substances.
00:51
All right? for substance c, we know that the distance the solvent traveled is 6 and the substance traveled 4.
00:58
This gives us an rf value of 0 .667.
01:04
For substance b, we know that it has traveled 6...