Separation techniques - chromatography method and questions 2025

Last updated about 4 hours ago

17 questions

Untitled Section 1

Separation techniques - chromatography method and questions 2025

Last updated about 4 hours ago

17 questions

Untitled Section 1

(i) State why the solvent level should not be above the base line at the start of the experiment.
To prevent the ________________________ in the ____________.

Other Answer Choices:

solvent

dissolving

inks

(iii) State why ink D does not move during the experiment.

Calculate the Rf values

Distance travelled by A =

Calculate the Rf values

What is the Rf value?

Match the labels

Other Answer Choices:

line in pencil

Samples

Chromatography paper

Beaker

solvent

The bottom of paper must be ___________________
The pencil line must be ______________________
   

Other Answer Choices:

in the solvent

above the solvent

Select the correct option.
Note - the more soluble a dye is the further the dot will move.
Note - the more soluble the dye the larger the Rf value will be.
Note -  the Rf value can not be more than 1.

Other Answer Choices:

False

True

Rf = _______ / _______ 
Rf = _______ 

Note - the _________  soluble a dye is the further the dot will move.
Note - the more soluble the dye the ___________  the Rf value will be.
Note -  the Rf value can not be more than ______ .

Other Answer Choices:

larger

0.5

less

smaller

Other Answer Choices:

Start line not drawn in ______________________ so line will _____________ 
Samples are in the ____________ so the samples will _____________ in the water instead of moving up the __________ .

Other Answer Choices:

solvent

pencil

paper

dissolve

Sample B did not move as sample is ___________soluble in the solvent used.
To fix this we would use a  ______________solvent, for example ____________  alcohol or propanol in which sample B _______  soluble

Other Answer Choices:

is not

ethanol

different

Separation techniques - chromatography method and questions 2025

Separation techniques - chromatography method and questions 2025

(iii) State why ink D does not move during the experiment.

Calculate the Rf values

Distance travelled by A =

Calculate the Rf values

What is the Rf value?

https://www.focuselearning.co.uk/s/27wzak56mghd

Method for making a chromatogram.

Method to determine a Rf value

(ii) Explain which dye, present in one of the inks A, B, C, or D, is also present in ink P.

(iii) State why ink D does not move during the experiment.

Calculate the Rf values

Distance travelled by A =

Calculate the Rf values

What is the Rf value?

Sample

Separation techniques - chromatography method and questions 2025

Separation techniques - chromatography method and questions 2025

(iii) State why ink D does not move during the experiment.

Calculate the Rf valuesDistance travelled by A =

Calculate the Rf valuesWhat is the Rf value?

https://www.focuselearning.co.uk/s/27wzak56mghdMethod for making a chromatogram.

Method to determine a Rf value

(ii) Explain which dye, present in one of the inks A, B, C, or D, is also present in ink P.

(iii) State why ink D does not move during the experiment.

Calculate the Rf valuesDistance travelled by A =

Calculate the Rf valuesWhat is the Rf value?

Sample

Calculate the Rf values

Distance travelled by A =

Calculate the Rf values

What is the Rf value?

https://www.focuselearning.co.uk/s/27wzak56mghd

Method for making a chromatogram.

Calculate the Rf values

Distance travelled by A =

Calculate the Rf values

What is the Rf value?