A solute will dissolve in a solvent when the attractive intermolecular forces between the molecules of the solvent and the molecules of the solute are greater than the attractive forces between one solute molecule and another. Thus the solute is effectively 'pulled apart' (on a molecular level at least) by the solvent and it's molecules become 'suspended' between the molecules of the solvent at which point the solute is said to be in solution or dissolved.
Solvents dissolve the solutes. Ex: water=solvent, powdered juice=solute Water is needed to dissolve the powdered juice so it can result in a juice drink.
to elute / move the components in a mixture and to separate them.
zara loves sanaa
water
Because methanol is a very polar solvent
it means that the solvent dissolves the solute.
the more soluble the plant pigment is with the chromatography solvent, the farther it will travel up the chromatography paper
Mobile phase.
water
Because methanol is a very polar solvent
Both are techniques of analytical chemistry and use a solvent.
it means that the solvent dissolves the solute.
the more soluble the plant pigment is with the chromatography solvent, the farther it will travel up the chromatography paper
In chromatography you need one stationery phase (paper) and one mobile phase (here solvent, moving by capillary forces)
Mobile phase.
Rf value is the ratio of distanced covered by solute by distanced covered by solvent.
Chromatography
•Descending chromatography is faster because gravity helps the solvent flow.
See related link below for a better explanation than mine.. I am not to familiar with Rf values, but I have an idea. Rf values are the ratio between the distance traveled by the spot of the analyte to the distance traveled by the solvent used. This is used in paper chromatography and thin layer chromatography. Rf value will allow you to compare to your unknown substance that you are trying to analyze. I will put a link the both paper and TL chromatography.
In paper chromatography n-butanol:acetic acid:water mixture in the ratio 4:1:1 is used as a solvent whereas in case of thin layer chromatography(TLC) petroleum ether and acetone in the ratio 9:1 is used as a solvent. Also, in some cases, DCM(dichloromethane is used as a solvent.