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.

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

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

Question 2

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... show full transcript

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

Step 1

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

96%

114 rated

Answer

The letter of the ink that contained only one coloured dye is Y.

Step 2

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

99%

104 rated

Answer

The two inks that could have been mixed to make ink W are X and Z.

Step 3

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:

96%

101 rated

Answer

The correct option is D - a separating funnel.

Step 4

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

98%

120 rated

Answer

The correct option is A, which shows a low boiling point and good ability to conduct electricity.

Step 5

Write the balanced equation for this reaction.

97%

117 rated

Answer

The balanced equation for the reaction of hydrogen and chlorine to form hydrogen chloride is:

ightarrow 2HCl$$

Step 6

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

97%

121 rated

Answer

In the HCl molecule:

Hydrogen has 1 electron in its outer shell.
Chlorine has 7 outer electrons.

Draw hydrogen (•) and chlorine (×) to represent their outer electrons:

  •
  |  ×

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.

Join the GCSE students using SimpleStudy...

Other GCSE Chemistry topics to explore