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Created page with "==Key Stage 4== ===Meaning=== The Retention Factor is a ratio of how far a chemical moves along the paper compared to how far the solvent moves along the paper..."
==Key Stage 4==
===Meaning===
The [[Retention Factor]] is a [[ratio]] of how far a [[chemical]] moves along the paper compared to how far the [[solvent]] moves along the paper in a [[chromatography]] [[experiment]].
===About Retention Factors===
: Each [[chemical]] has a [[Retention Factor|Retention Factor (R<sub>f</sub> number)]].
: The larger the [[Retention Factor]] the greater the [[force]] of [[attraction]] experienced by the [[chemical]] to the paper. The [[chemical]] is 'retained' in place.
: [[Retention Factor|R<sub>f</sub>]] numbers are unique to each [[chemical]] and can be used to [[Separating Mixtures|separate]] and identify the [[chemical]].
===Equation===
: [[Retention Factor]] = (distance moved by [[chemical]])/(distance moved by [[solvent]])
:<math>R_f = \frac{d_c}{d_s}</math>
:Where:
:R<sub>f</sub> = [[Retention Factor]]
:d<sub>c</sub> = distance moved by the [[chemical]]
:d<sub>s</sub> = distance moved by the [[solvent]]
===Meaning===
The [[Retention Factor]] is a [[ratio]] of how far a [[chemical]] moves along the paper compared to how far the [[solvent]] moves along the paper in a [[chromatography]] [[experiment]].
===About Retention Factors===
: Each [[chemical]] has a [[Retention Factor|Retention Factor (R<sub>f</sub> number)]].
: The larger the [[Retention Factor]] the greater the [[force]] of [[attraction]] experienced by the [[chemical]] to the paper. The [[chemical]] is 'retained' in place.
: [[Retention Factor|R<sub>f</sub>]] numbers are unique to each [[chemical]] and can be used to [[Separating Mixtures|separate]] and identify the [[chemical]].
===Equation===
: [[Retention Factor]] = (distance moved by [[chemical]])/(distance moved by [[solvent]])
:<math>R_f = \frac{d_c}{d_s}</math>
:Where:
:R<sub>f</sub> = [[Retention Factor]]
:d<sub>c</sub> = distance moved by the [[chemical]]
:d<sub>s</sub> = distance moved by the [[solvent]]