precipitation reactions

what is precipitation

occurs when two solutions combine and a new compound of low solubility in water is formed

what is a solute

a substance that is being dissolved

if something insoluble it.

will not dissolve

what is a solvent

a liquid in which the solute is dissolved

what is solubility

the extent to which a solute dissolves in a solvent

what is an ion dipole bond

a bond between an ion and a polar molecule

what is dissociation

the process by which ions seperate when an ionic substance dissolves

why is water a good solvent

due to its polarity

what is the like dissolves like rule

polar solutes will dissolve in polar solvents and non-polar solutes will dissolve in non-polar solvents

what is chromatography

a technique for the separation of a mixture by passing it in a solution helping to make component s move a different rates

what is the the mobile phase in chromatography

the mixture to be analysed in process

what is the the stationary phase in chromatography

a material with a high surface area used in the process

what is the Rf value (retardation factor)

the ratio of the distance travelled by the solute to the distance travelled by the solvent

j

what is the formula for Rf

Rf = distance moved by solute divided by distance moved by solvent

what is the solvent front

the furthest point the solvent travels up the paper