Transcript Slide 1

CKS3: Yr7 Chemistry Unit 1 – Me the the Scientist!
Lesson number: 3.
Lesson Title: Solutions and Mixtures.
Learning Outcomes
How I did
Targets
Learning Outcome 1:
To be able to explain the
difference between pure
mineral water and distilled
water. Level 4
Learning 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
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Cro2011
BIG picture
Key Question:
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 laptops
Numeracy- by using formulae in calculations
Literacy- by writing explanations using correctly spelt
keywords and good grammar.
Team work- during a practical investigation
Self management- by completing an individual assignment
by …..
Creative thinking- by designing a ……………….
Independent enquiry- by researching the internet
Participation- during a practical activity
Reflection- through self and peer assessment of each
outcome
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Quick Discussion:
Lesson activities
• Visual: Demonstration
• Audio: Demonstration
• Kinaesthetic: Class Experiment
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New Information for Task 1
Making 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.
Demonstrate your Learning
for Outcome 1
Create
I am working at level ....
because ...........
Evaluate
To get to the next level I
need to ...........
Analyse
Understand (L4)
Apply
Remember (L3)
Understand
I can describe how to
make distilled water.
Remember
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I can explain the difference
between pure mineral water
and distilled water.
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 Learning
Extended 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
To be able to explain the difference between
pure mineral water and distilled water.
Go back to your Learning Outcome grid and fill out the
‘How I did’ and the ‘Targets’ column.
Learning Outcome
Learning Outcome 1:
Level 5
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How I did
Met?
Partly met?
Not met?
Targets
How can I improve
on Learning
Outcome 1?
New Information for Learning Outcome 2
Dissolving
Can you explain these terms?
thermometer
Term
Explanation
Solute
A substance that can be dissolved.
beaker of water
Solvent
Solution
A substance that dissolves other substances.
tripod
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.
heat proof mat
Mixtures
A mixture is easy to separate.
sand
water
Solutions
A solution is a homogeneous mixture of two or more substances.
In a solution the solute is evenly spread out throughout the solvent.
A homogeneous mixture of two or more substances
Solution or Mixture?
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
copper sulphate
and water
oil and water
Demonstrate your Learning
for Outcome 2
I am working at level ....
because ...........
Create
To get to the next level I
need to ...........
Evaluate
Apply (L5)
I was able to correctly
identify the solutions
and mixtures that we
were shown.
Analyse
Apply
Understand (L4)
Understand
Remember
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I can explain the difference
between solutions and
mixtures
Learning Outcome 2: Review
To be able to identify solutions and mixtures.
Go back to your Learning Outcome grid and fill out the
‘How I did’ and the ‘Targets’ column.
Learning Outcome
Learning Outcome 2:
Level 6
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How I did
Met?
Partly met?
Not met?
Targets
How can I improve
on Learning
Outcome 2?
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
Observations
Copper sulphate
solution
5 drops of sodium Copper sulphate solution is blue.
hydroxide
When the sodium hydroxide was
added ……..
solution
Dilute
A strip of
hydrochloric acid 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
Observations
Copper
sulphate
solution
5 drops of
Copper sulphate solution is blue (1).
There
marks available.
sodium were 18
When the sodium hydroxide solution was added a
hydroxide
blue (1) solid (1) (a precipitate) was formed.
Record
your
score.
solution
Dilute
hydrochloric
acid
A
strip of
Dilute hydrochloric
is colourless.
(1) When
Then
write a comment
aboutacid
what
you
magnesium
the magnesium metal was added bubbles/fizzing
need
to
do
to
improve.
metal
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.
Demonstrate your Learning
for Outcome 3
I am working at level ....
because ...........
Create
To get to the next level I
need to ...........
Evaluate
Analyse (L6)
Apply (L5)
I was able to do the
practical as part of a
team, and I recorded our
observations.
Analyse
Apply
Understand
Remember
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I accurately recorded the
observations and scored more
than 13/18.
Understand (L4)
I did the practical, but needed
some help.
Learning Outcome 3: Review
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.
Learning Outcomes
Learning Outcome 3:
Level 6
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How I did
Met?
Partly met?
Not met?
Targets
How can I improve
on Learning
Outcome 3?
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?
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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