Retention Factor - Revision history

Ellen References at 17:16, 12 November 2019

2019-11-12T17:16:12Z

NRJC: /* Equation */

2019-05-13T21:35:40Z

‎Equation

NRJC: /* Equation */

2019-05-13T21:34:57Z

‎Equation

NRJC: 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..."

2019-01-23T10:54:04Z

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..."

New page

==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 (Rf 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|Rf]] 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:
:Rf = [[Retention Factor]]
:dc = distance moved by the [[chemical]]
:ds = distance moved by the [[solvent]]

← Older revision		Revision as of 17:16, 12 November 2019
Line 20:		Line 20:

	d<sub>s</sub> = distance moved by the [[solvent]]		d<sub>s</sub> = distance moved by the [[solvent]]
		+
		+	===References===
		+	====AQA====
		+
		+	:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Retention factors, page 183, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']

@@ Line 9: / Line 9: @@
 ===Equation===
-: [[Retention Factor]] = (distance moved by [[chemical]])/(distance moved by [[solvent]])
+[[Retention Factor]] = (distance moved by [[chemical]])/(distance moved by [[solvent]])
 <math>R_f = \frac{d_c}{d_s}</math>
-:Where:
+Where:
-:R<sub>f</sub> = [[Retention Factor]]
-:d<sub>c</sub> = distance moved by the [[chemical]]
+R<sub>f</sub> = [[Retention Factor]]
-:d<sub>s</sub> = distance moved by the [[solvent]]

@@ Line 10: / Line 10: @@
 ===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]]