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anonymous

  • one year ago

has some one done the chromatography : separating mixtures lab i need help in it

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  1. Photon336
    • one year ago
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    well there is TLC thin layer chromatography. let me explain this.

  2. anonymous
    • one year ago
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    ok

  3. Photon336
    • one year ago
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    |dw:1442630427110:dw|

  4. anonymous
    • one year ago
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    i know that but all i need is the table

  5. anonymous
    • one year ago
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    it is a lab project

  6. Photon336
    • one year ago
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    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|

  7. anonymous
    • one year ago
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    it for a lab project

  8. Photon336
    • one year ago
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    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.

  9. anonymous
    • one year ago
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    im home school so i dont get help

  10. Photon336
    • one year ago
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    hey do you have a screenshot of this or something @sof12345678910 ?

  11. anonymous
    • one year ago
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    yes

  12. Photon336
    • one year ago
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    try posting it as an attachment

  13. anonymous
    • one year ago
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    i will in a sec if it works

  14. Photon336
    • one year ago
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    ok

  15. anonymous
    • one year ago
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  16. anonymous
    • one year ago
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    does it show

  17. Photon336
    • one year ago
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    yeah I see it

  18. anonymous
    • one year ago
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    it is really haha

  19. Photon336
    • one year ago
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    "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? "

  20. anonymous
    • one year ago
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    i all ready did that

  21. anonymous
    • one year ago
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    i just need the table

  22. Photon336
    • one year ago
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    You actually have to do the experiment

  23. anonymous
    • one year ago
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    i know but it did not work

  24. Photon336
    • one year ago
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    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

  25. anonymous
    • one year ago
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    i know

  26. Photon336
    • one year ago
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    let me read this again

  27. anonymous
    • one year ago
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    i may just turn it with out the table

  28. anonymous
    • one year ago
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    that is the grading

  29. Photon336
    • one year ago
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    @sof12345678910 let me draw you another diagram

  30. anonymous
    • one year ago
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    ok

  31. Photon336
    • one year ago
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    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|

  32. Photon336
    • one year ago
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    Then take your marker that you want to test

  33. Photon336
    • one year ago
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    say you have 3 different colors

  34. Photon336
    • one year ago
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    let's say Red, Blue, and green

  35. anonymous
    • one year ago
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    ok

  36. Photon336
    • one year ago
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    |dw:1442632607470:dw|

  37. anonymous
    • one year ago
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    ok let me get the marker

  38. Photon336
    • one year ago
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    I think you'll have to use different colors

  39. anonymous
    • one year ago
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    ok

  40. Photon336
    • one year ago
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    |dw:1442632767482:dw|

  41. Photon336
    • one year ago
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    @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.

  42. anonymous
    • one year ago
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    ok

  43. Photon336
    • one year ago
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    Now the most important step

  44. Photon336
    • one year ago
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    get a small glass

  45. anonymous
    • one year ago
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    ok

  46. Photon336
    • one year ago
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    |dw:1442633042728:dw|

  47. anonymous
    • one year ago
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    ok

  48. Photon336
    • one year ago
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    @sof12345678910 when you put the solvent in, it must be below that first line in the strip then you let it stand.

  49. anonymous
    • one year ago
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    ok

  50. Photon336
    • one year ago
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    You need to do this twice once for water, and once for alcohol

  51. anonymous
    • one year ago
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    ok

  52. Photon336
    • one year ago
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    Last thing: |dw:1442633223525:dw|

  53. anonymous
    • one year ago
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    ok

  54. Photon336
    • one year ago
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    hopefully this is more clear

  55. anonymous
    • one year ago
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    yea it is thanks

  56. Photon336
    • one year ago
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    no problem

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