Different mixtures can be separated using different methods. (a) Draw a line from each separation process to the apparatus used. Use only one line for each process. Separation process Apparatus used Crystallisation Filtration Distillation g (b) A student is given a mixture of iron filings and sulfur powder. Suggest a method that he could use to separate the iron and sulfur. (c) The student heated the mixture to form solid iron sulfide. This is an example of a chemical change. Write down two ways the student will know a chemical reaction has taken place. 1. 2. (d) (i) The particle model shows how particles are arranged and how they move in solids, liquids and gases. Describe how the particles are arranged in a solid. (ii) Describe how the particles move in a solid.

GCSE OCR Gateway Chemistry 8.1 Purity, Formulations & Chromatography: Different mixtures can be separa

Different mixtures can be separated using different methods - OCR Gateway - GCSE Chemistry - Question 16 - 2019 - Paper 1

Question 16

Different mixtures can be separated using different methods. (a) Draw a line from each separation process to the apparatus used. Use only one line for each process... show full transcript

Worked Solution & Example Answer:Different mixtures can be separated using different methods - OCR Gateway - GCSE Chemistry - Question 16 - 2019 - Paper 1

Step 1

a) Draw a line from each separation process to the apparatus used.

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Answer

Crystallisation → Heat source (for evaporation)
Filtration → Filter paper and funnel
Distillation → Distillation apparatus

Step 2

b) Suggest a method that he could use to separate the iron and sulfur.

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Answer

The student could use a magnet to separate the iron filings from the sulfur powder. Since iron is magnetic and sulfur is not, the magnet would attract the iron filings while leaving the sulfur behind.

Step 3

c) Write down two ways the student will know a chemical reaction has taken place.

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Answer

A change in color of the mixture can be observed.
The formation of a new solid (precipitate) or gas can be visualized.

Step 4

d) (i) Describe how the particles are arranged in a solid.

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Answer

In a solid, particles are closely packed together in a fixed arrangement. They are organized in a lattice structure, which allows them to vibrate in place without moving past each other.

Step 5

d) (ii) Describe how the particles move in a solid.

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Answer

In a solid, the particles vibrate around fixed positions. They do not change places or flow like in liquids or gases, maintaining a definite shape and volume.

Different mixtures can be separated using different methods - OCR Gateway - GCSE Chemistry - Question 16 - 2019 - Paper 1

Worked Solution & Example Answer:Different mixtures can be separated using different methods - OCR Gateway - GCSE Chemistry - Question 16 - 2019 - Paper 1

a) Draw a line from each separation process to the apparatus used.

b) Suggest a method that he could use to separate the iron and sulfur.

c) Write down two ways the student will know a chemical reaction has taken place.

d) (i) Describe how the particles are arranged in a solid.

d) (ii) Describe how the particles move in a solid.

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