GCSE Edexcel Chemistry Separating mixtures: a) Paper chromatography can be u

Question

a) Paper chromatography can be used to separate the coloured dyes in inks.
A student carried out a chromatography experiment on four inks, W, X, Y and Z.
The diagram shows the result.

solvent front

start line

ink W  ink X  ink Y  ink Z

(i) State the letter of the ink that contained only one coloured dye.

(ii) Ink W has been made by mixing two of the other inks together.
State the two inks that could have been mixed to make ink W.

and

b) Complete the sentence by putting a cross (✗) in the box next to your answer.
Oil and water are immiscible liquids.
A mixture of oil and water is best separated by using:

A  distillation

B  evaporation

C  a filter funnel

D  a separating funnel

c) Which row of the table correctly shows the boiling point and ability to conduct electricity of a simple molecular, covalent liquid?
Put a cross (✗) in the box next to your answer.

boiling point  ability to conduct electricity

A  low           good

B  high          poor

C  low           poor

D  high          good

d) Hydrogen chloride, HCl, can be formed by the reaction of hydrogen, H2, with chlorine, Cl2.
Write the balanced equation for this reaction.

e) The electronic configuration of hydrogen is 1.
The electronic configuration of chlorine is 2.8.7.
Draw a dot and cross diagram to show the arrangement of electrons in a molecule of hydrogen chloride, HCl.
Show outer electrons only.

a) Paper chromatography can be used to separate the coloured dyes in inks - Edexcel - GCSE Chemistry - Question 2 - 2015 - Paper 1

Worked Solution & Example Answer:a) Paper chromatography can be used to separate the coloured dyes in inks - Edexcel - GCSE Chemistry - Question 2 - 2015 - Paper 1

State the letter of the ink that contained only one coloured dye.

State the two inks that could have been mixed to make ink W.

Complete the sentence by putting a cross (✗) in the box next to your answer. A mixture of oil and water is best separated by using:

Which row of the table correctly shows the boiling point and ability to conduct electricity of a simple molecular, covalent liquid?

Write the balanced equation for this reaction.

Draw a dot and cross diagram to show the arrangement of electrons in a molecule of hydrogen chloride, HCl.

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