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What is a solvent?

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What is a solute?

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What does soluble mean?

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C2 Experimental Techniques

Who was the Alien?

C2.2.1 Interpret simple chromatograms

The larger and less soluble particles travel slower

The smaller and more soluble particles travel faster

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Your Job - Make this!

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Page 21

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Risk

Harm

Precaution

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Insoluble base = Copper (II) Oxide

Acid = Dilute Sulphuric Acid

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C2 Experimental Techniques

Can you solve the mnm mystery?

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C2.2.1 Interpret simple chromatograms

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C2 Experimental Techniques

C2.2.1 Interpret simple chromatograms

  1. Draw a line 1.5cm from the bottom of the chromatography paper
  2. Place 2 different coloured skittles on plain a4 paper
  3. Using a pipette, drop 3 drops of water onto the skittles. Wait 2 minutes
  4. Use the cotton bud to spot the coloured solution onto the chromatography paper
  5. Repeat for mnms
  6. Fold the paper around a splint and dip then end into water

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Hint: try not to put the samples too closely together as they will mix

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C2 Experimental Techniques

Chromatography is a technique to separate mixtures of liquids (often coloured) that are soluble in the same solvent

C2.2.1 Interpret simple chromatograms

1.State what colours are in MnMs

2.Predict if you think they are the same that are in skittles

3. Discuss how could you test this

Challenge: What does the mobile phase mean?

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C2 Experimental Techniques

C2.2. 2 Interpret simple chromatograms, including the use of Rf values

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Chromatography paper

Pencil line

(make sure this is ABOVE the solvent surface)

SOLVENT (water)

(make sure this is below the pencil line)

Pigment or dye

Beaker

straw

Paper clip

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Edge of paper

Pencil line

Solvent (water)

A close up view of one dye spot

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Edge of paper

Pencil line

Solvent (water)

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Edge of paper

Pencil line

Solvent (water)

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Edge of paper

Pencil line

Solvent (water)

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Edge of paper

Pencil line

Solvent (water)

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Edge of paper

Pencil line

Solvent (water)

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Edge of paper

Pencil line

Solvent (water)

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Edge of paper

Pencil line

Solvent (water)

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Edge of paper

Pencil line

Solvent (water)

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Edge of paper

Pencil line

Solvent (water)

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Edge of paper

Pencil line

Solvent (water)

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C2 Experimental Techniques

Investigate the use of measuring equipment around the room

C2.1.1 Name and suggest appropriate apparatus for the measurement of time, temperature, mass and volume, including burettes, pipettes and measuring cylinders

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  1. Define: Solute, Solvent and Solution
  2. Choose one of the following separation techniques:
  3. Filtration
  4. Crystallisation
  5. Distillation
  6. Fractional distillation of crude oil
  7. Paper chromatography

3. Describe what the methods of separation and purification are. (simple steps)

4. Explain how to conduct your separation/purification techniques using common examples

Challenge: Suggest industries that use these methods and how the use/could they modify them.

Include a 5 question quiz

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C2 Experimental Techniques

Choose one of the following and create a PowerPoint or Canva presentation

C2.3.1 Describe and explain methods of separation and purification by the use of a suitable solvent, filtration, crystallisation, distillation, fractional distillation and paper chromatography

C2.3.2 Suggest suitable separation and purification techniques, given information about the substances involved

How do I conduct the experiment and what results would I expect?

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Type of separation/purification

Used to separate

Principles of science

Examples

Filtration

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Crystallisation

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Distillation

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Fractional distillation

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Paper chromatography

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C2 Experimental Techniques

Complete the table from the PowerPoint presentations

C2.3.1 Describe and explain methods of separation and purification by the use of a suitable solvent, filtration, crystallisation, distillation, fractional distillation and paper chromatography

C2.3.2 Suggest suitable separation and purification techniques, given information about the substances involved