anonymous
  • anonymous
has some one done the chromatography : separating mixtures lab i need help in it
Chemistry
  • Stacey Warren - Expert brainly.com
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jamiebookeater
  • jamiebookeater
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Photon336
  • Photon336
well there is TLC thin layer chromatography. let me explain this.
anonymous
  • anonymous
ok
Photon336
  • Photon336
|dw:1442630427110:dw|

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anonymous
  • anonymous
i know that but all i need is the table
anonymous
  • anonymous
it is a lab project
Photon336
  • Photon336
Well you sometimes use this to see if your compounds reacted, or whether there are certain compounds left in solution. you create a solvent system; usually it's like ethyl acetate and hexanes in a certain ratio; and then based off of your solvent system You asked for a table, what table are you talking about? for TLC you need to calculate Rf values which is basically how much the compound moved on the paper, and there is no chart for those you need to determine those experimentally. |dw:1442630592412:dw|
anonymous
  • anonymous
it for a lab project
Photon336
  • Photon336
Your lab instructor will give you a solvent system to use or you'll be asked to find out/ prepare one yourself. in my lab course, we had to find out the solvent system that was necessary to separate our compounds. like I said the solvent system is usually Hexanes and Ethyl acetate. like there is no general chart for TLC if that's what you're saying.
anonymous
  • anonymous
im home school so i dont get help
Photon336
  • Photon336
hey do you have a screenshot of this or something @sof12345678910 ?
anonymous
  • anonymous
yes
Photon336
  • Photon336
try posting it as an attachment
anonymous
  • anonymous
i will in a sec if it works
Photon336
  • Photon336
ok
anonymous
  • anonymous
anonymous
  • anonymous
does it show
Photon336
  • Photon336
yeah I see it
anonymous
  • anonymous
it is really haha
Photon336
  • Photon336
"1. List one extensive and one intensive property of marker ink. 2. Define mixture. 3. Is tap water a heterogeneous or homogenous mixture? Explain your answer. 4. Is isopropyl alcohol (rubbing alcohol) a heterogeneous or homogenous mixture? "
anonymous
  • anonymous
i all ready did that
anonymous
  • anonymous
i just need the table
Photon336
  • Photon336
You actually have to do the experiment
anonymous
  • anonymous
i know but it did not work
Photon336
  • Photon336
why would they give something like this lol if you're a virtual student without being in a real lab?,, makes no sense. to me
anonymous
  • anonymous
i know
Photon336
  • Photon336
let me read this again
anonymous
  • anonymous
i may just turn it with out the table
anonymous
  • anonymous
that is the grading
Photon336
  • Photon336
@sof12345678910 let me draw you another diagram
anonymous
  • anonymous
ok
Photon336
  • Photon336
Take your coffee filter and cut it into a piece like the one below. Take a pencil and trace lightly two lines, one about a 1/2 inch from the top, the other a 1/2 inch from the bottom |dw:1442632373919:dw|
Photon336
  • Photon336
Then take your marker that you want to test
Photon336
  • Photon336
say you have 3 different colors
Photon336
  • Photon336
let's say Red, Blue, and green
anonymous
  • anonymous
ok
Photon336
  • Photon336
|dw:1442632607470:dw|
anonymous
  • anonymous
ok let me get the marker
Photon336
  • Photon336
I think you'll have to use different colors
anonymous
  • anonymous
ok
Photon336
  • Photon336
|dw:1442632767482:dw|
Photon336
  • Photon336
@sof12345678910 make sure that when you spot with each color you put a small dot where the first line is where, you leave some space , then put the second color, space, third color. you have to leave space between.
anonymous
  • anonymous
ok
Photon336
  • Photon336
Now the most important step
Photon336
  • Photon336
get a small glass
anonymous
  • anonymous
ok
Photon336
  • Photon336
|dw:1442633042728:dw|
anonymous
  • anonymous
ok
Photon336
  • Photon336
@sof12345678910 when you put the solvent in, it must be below that first line in the strip then you let it stand.
anonymous
  • anonymous
ok
Photon336
  • Photon336
You need to do this twice once for water, and once for alcohol
anonymous
  • anonymous
ok
Photon336
  • Photon336
Last thing: |dw:1442633223525:dw|
anonymous
  • anonymous
ok
Photon336
  • Photon336
hopefully this is more clear
anonymous
  • anonymous
yea it is thanks
Photon336
  • Photon336
no problem

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