• Re: TLC Question

    Updated: 2021-09-20 01:41:21
    Thank you.

  • Re: 2aluminums and 3 sulfurs, what does it mean?

    Updated: 2021-09-20 01:36:17
    oooh he was referring to aluminum sulfide, i thought about that as well but i was like no way, for some reason, anyway, thanks for that. So in this example, al+s forms al2s3 and that's how you calculate the perfect ratio? what about the percentage thing at 1:15 though? could you direct me to another site or a tutorial if the explanation is difficult?

  • Re: TLC Question

    Updated: 2021-09-20 01:28:45
    For spotting, you just need to transport it on there and make a nice small concentrated spot. So whatever solvent will work is what you use. Usually its something like ethyl acetate or acetone. Typically the spotting solvent then evaporates off before you actually run the TLC

  • TLC Question

    Updated: 2021-09-20 01:10:02
    Question is written below. I am confused because the eluan is not dissolved in a solvent so the question does not make sense to me.When spotting compounds on a TLC plate, do the compounds have to be dissolved in the same solvent as the eluant? Why or why not?Am I overthinking it?

  • Great Explanations – Crowdfunded science anthology

    Updated: 2021-09-05 14:52:05
    Excuse the slight off (chemistry) topic post, but I wanted to let folks know about a crowdfunded science anthology I’ve launched via Unbound. You don’t need a PhD in horology to know that there are piles of great popular science books out there and not enough time to read them […]

  • The Periodic Dinner table

    Updated: 2021-08-09 09:52:44
    Tweet Follow @mark_lorch Chemistry built the modern world, from the materials that make up the everyday objects around us, the batteries in our devices and cleaning products that help to maintain sanitation. All this and much more besides are examples of chemistry in everyday life. To illustrate this and have […]

  • 2021 Common Last Topic for O Level & A Level

    Updated: 2021-07-29 03:54:51
    The Common Last Topic highlighted in yellow (syllabus content) will not be tested in 2021 O Level/A Level National Examination. Click on the SEAB link for more details. Turn your mobile phone to landscape position to view the entire table. Subject (Code) CLT SEAB Link O Level Pure Chemistry (6092) Organic Chemistry O Level Pure […]

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