Chromatographic Method - Surface Chemistry, Chemistry, Class 12 Video Lecture - Class 12 | Best Video for Class 12

so chromatography literally translates
as writing with color compare that to
photography and cryptography and well
you can think of another one
so the stationary phase well that's
packed into the glass column that is the
chromatography column and the chemicals
that I'd like to separate in this case
chemicals a and B well then dissolved in
what's called the mobile phase so I'm
going to pour those chemicals into that
color now the idea of chromatography is
to split chemicals apart from each other
they're in a mixture so in this case
under gravity these chemicals are going
to start to move down this column you'll
notice that they're moving down the
common different rates and this might
take a few minutes but not the video the
actual thing itself and eventually
you'll see that the chemicals have been
split apart and if you pour more mobile
phase down they'll split apart even more
and this is called partition now the
trick with this is you've got to learn
the correct words so there's been a
partition of the chemicals between the
mobile phase and the stationary phase it
appears that chemical B prefers to be in
the mobile phase because it went down
the column with the mobile phase further
and chemical a seems to prefer being on
the stationary phase because it stuck
there they wandered there for longer and
thus didn't move so far down the color
you've got to use the proper terminology
for that adsorption with a D that's the
name of the process where the chemical
sticks to the stationary phase and
dissolve the chemical that likes to be
in the mobile phase stays dissolved in
the mobile phase longer you've got to
use these words and the mobile phase
might also be called the solvent
you