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CKS3: Yr7 Chemistry Unit 1 – Me the the Scientist!Lesson number: 3. Lesson Title: Solutions and Mixtures.Learning Outcomes How I did TargetsLearning Outcome 1: To be able to explain the difference between pure mineral water and distilled water. Level 4Learning Outcome 2:To be able to identify solutions and mixtures.Level 5

Learning Outcome 3:To be able to carry out an observation exercise using solutions and mixtures.Level 6.

Connector:

Suggest some differences between:

• distilled water

• tap water

• mineral water

• rain water

• sea water

Cro2011

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BIG pictureKey Question:

Quick Discussion:

How is this lesson relevant to every day life?

What skills will you be developing this lesson?

HSW- by planning and carrying out an investigation/ Interpreting data/ evaluating an experiment

ICT- through using laptopsNumeracy- by using formulae in calculationsLiteracy- by writing explanations using correctly spelt

keywords and good grammar. Team work- during a practical investigationSelf management- by completing an individual assignment

by …..Creative thinking- by designing a ……………….Independent enquiry- by researching the internetParticipation- during a practical activityReflection- through self and peer assessment of each

outcome

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Lesson activities

• Visual: Demonstration• Audio: Demonstration• Kinaesthetic: Class Experiment

New Information for Task 1Making distilled water

• Distilled water is pure water it has nothing dissolved in it.

• When the salt water started to boil steam formed.

• The reading on the thermometer rose to 100oC, this is the boiling point of water.

• When the steam passed through the condenser it was cooled and so turned back to water. This is called condensation.

• The now pure water was collected in the collection flask.

Tap water, mineral water, rain water and sea water are not pure because they have dissolved substances in them.

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Create

Evaluate

Analyse

Apply

Understand

Remember

Understand (L4)I can explain the difference between pure mineral water and distilled water.

Remember (L3)I can describe how to make distilled water.

Demonstrate your Learning for Outcome 1

I am working at level .... because ........... To get to the next level I

need to ...........

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Keywords:Create sentences using the keywords to show that you know what they mean.

Put your hand up if there is any key word from the list that you don’t understand.

• distilled water • steam • boiling point • condensation• solute• solvent• solution• dissolve• soluble• insoluble• mixture

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Extended LearningExtended Learning task:

Learn the key words - spellings and explanations

Due date:

Criteria for Level 5:– Basic description, basic detail.

Criteria for Level 6:– Description with explanation and good level of detail.

Criteria for Level 7:– Detailed description and in depth detailed explanation using

examples to highlight points made.

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Learning Outcome 1: Review

Learning Outcome How I did Targets

Learning Outcome 1:

Level 5

Met?Partly met?Not met?

How can I improve on Learning Outcome 1?

Go back to your Learning Outcome grid and fill out the ‘How I did’ and the ‘Targets’ column.

To be able to explain the difference between pure mineral water and distilled water.

thermometer

beaker of water

tripod

heat proof mat

New Information for Learning Outcome 2

Dissolving Can you explain these terms?

Term Explanation

Solute A substance that can be dissolved.

Solvent A substance that dissolves other substances.

Solution A homogeneous mixture of two or more substances.

Dissolve To go into solution. To make a solution

Soluble Will dissolve.

Insoluble Will not dissolve.

Mixture Two or more substances that can be easily separated.

MixturesA mixture is easy to separate.

sand

water

Solutions

A homogeneous mixture of two or more substances

A solution is a homogeneous mixture of two or more substances.

In a solution the solute is evenly spread out throughout the solvent.

Solution or Mixture?

oil and water

copper sulphate and water

sand and water

Choose ONE of each type and write why they are a solution or a mixture.

For the solution name the solute and the solvent

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Create

Evaluate

Analyse

Apply

Understand

Remember

Apply (L5)I was able to correctly identify the solutions and mixtures that we were shown.

Understand (L4)I can explain the difference between solutions and mixtures

Demonstrate your Learning for Outcome 2 I am working at level ....

because ...........

To get to the next level I need to ...........

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Learning Outcome 2: Review

Learning Outcome How I did Targets

Learning Outcome 2:

Level 6

Met?Partly met?Not met?

How can I improve on Learning Outcome 2?

Go back to your Learning Outcome grid and fill out the ‘How I did’ and the ‘Targets’ column.

To be able to identify solutions and mixtures.

Learning Activities for Outcome 3 Reactions using Solutions an Observation Exercise.A good scientist needs to be able to observe and accurately record what they see.

For each experiment fill a test tube 1/4 full with the solution and then add substance 2 as instructed. Watch carefully and record what you see.Solution Substance 2 ObservationsCopper sulphate solution

5 drops of sodium hydroxide solution

Copper sulphate solution is blue.When the sodium hydroxide was added ……..

Dilute hydrochloric acid

A strip of magnesium metal

Lead nitrate solution

Potassium iodide solution

Iron(II) sulphate solution

5 drops of sodium hydroxide solution

Copper sulphate solution

A strip of magnesium metal

Remember to wear safety glasses.

Solution Substance 2 ObservationsCopper sulphate solution

5 drops of sodium hydroxide solution

Copper sulphate solution is blue (1).When the sodium hydroxide solution was added a blue (1) solid (1) (a precipitate) was formed.

Dilute hydrochloric acid

A strip of magnesium metal

Dilute hydrochloric acid is colourless. (1) When the magnesium metal was added bubbles/fizzing was seen (1) and the metal dissolved/disappeared. (1)

Lead nitrate solution

Potassium iodide solution

Lead nitrate solution is colourless. (1)When the potassium iodide solution was added a yellow (1) solid (1) ( a precipitate) was formed.

Iron(II) sulphate solution

5 drops of sodium hydroxide solution

Iron(ii) sulphate solution is pale green /colourless (1). When the sodium hydroxide solution was added a (dirty) green (1) solid (1) (a precipitate) was formed. After a little while an orange colour was seen at the top of the mixture (1).

Copper sulphate solution

A strip of magnesium metal

Copper sulphate solution is blue (1). When the magnesium metal was added bubbles/fizzing was seen (1) and the metal dissolved/disappeared. (1)A brown/black (1) solid (1) formed on the surface of the metal.

There were 18 marks available.

Record your score.

Then write a comment about what you need to do to improve.

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Create

Evaluate

Analyse

Apply

Understand

Remember

Apply (L5)I was able to do the practical as part of a team, and I recorded our observations.

Understand (L4)I did the practical, but needed some help.

Analyse (L6)

I accurately recorded the observations and scored more than 13/18.

Demonstrate your Learning for Outcome 3 I am working at level ....

because ...........

To get to the next level I need to ...........

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Learning Outcome 3: Review

Learning Outcomes How I did Targets

Learning Outcome 3:

Level 6

Met?Partly met?Not met?

How can I improve on Learning Outcome 3?

Go back to your Learning Outcome grid and fill out the ‘How I did’ and the ‘Targets’ column.

To be able to carry out an observation exercise using solutions and mixtures.

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Review for Remembering

• Stand up if you have met the lesson outcomes?• If not what do you need to do next in order to meet

the outcome? Record this in your diary as part of your homework.

• Is there any part of the lesson you think you need to go over again next lesson?

• Tell the person next to you three things you have learnt this lesson.

• How will you remember this for your exam?

Technician’s list

Demo 1 – making distilled water• Distillation equipment – set up please• Wash bottle with distilled water• Mineral water bottle

Demo 2 – solution or mixture• Oil and water in a separating funnel• Copper sulphate solution in a beaker – labelled as

copper sulphate and water• Milk• Can of coke• White vinegar• Sand and water

Class Experiment - Reactions using Solutions an Observation Exercise

12x

Per group:

• 5x test tubes and test tube racks

• Copper sulphate solution

• Dilute hydrochloric acid

• Lead nitrate solution

• Iron (II) sulphate solution (use ferrous ammonium sulphate / ammonium iron (II) sulphate)

• sodium hydroxide solution

• 2x 2cm strip of magnesium

• Potassium iodide solution