Organic Chemistry 1 Lab Exam

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13 Terms

1
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The distance travelled on a TLC plate depends on?

The polarity of the compound(s) and the polarity of the mobile phase (solvent system)

2
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Like dissolves like true or false

true

3
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Stationary phase

is polar. an absorbent (ex: silica gel)

4
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Mobile phase

is non-polar. solvent mixture that carries compound across stationary phase. mobile=moving

5
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mobile phase is too polar. spots will move up faster.

6
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mobile phase is just right. best for spot separation. delta Rf should be around 0.2-0.3

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mobile phase is too non-polar

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Baseline too low

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Rf value

distance spot travelled/distance solvent travelled

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Aqueous phase rests where?

at the bottom

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Aqueous phase examples

brine, sodium bicarbonate

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Organic phase lies where?

on top

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