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Prelab: Rainbow in a Test Tube
1
Violet on Bottom
Red on Top
Two important
concepts:
Liquids that dissolve completely into each
other at any proportion are said to be
miscible.
Liquids are typically classified based on their miscibility as Aqueous or Organic
Will your test-tube rainbow work
if you put two aqueous or two organic
layers right on top of each other?
This does NOT mean I will
correct you if you are wrong.
Good luck!
You know what Density is.
You should know how to use it for this lab.
Density
GOAL:
in a
Test
Tube
R
A
I
N
B
O
W
Six distinct layers
Orange
Yellow
Green
Blue
Miscibility
Aqueous
What do these have in common?
Though all of these partition into the aqueous layer, which ones are technically organic?
Organic
These Super-Solvents
are miscible in both Aqueous
AND Organic solvents.
( )
We weren't mean enough
to give you any of these.
NO.
What you
have is what
you get. Use
it wisely.
Plan. Be tidy.
You must show
me your plan
before you will
get the dyes.
miscibility
is like
for liquids in liquids
solubility