Embedded Files
Introduction
Introduction
In this topic you will learn about the differences between elements, compounds and mixtures, be able to describe how to make up a solution and describe the different techniques used to separate out the substances in mixtures.
Task 1: Know
Task 1: Know
Task 1: Use look, cover, write check to learn the answers to the core questions and the keywords for this topic
Learn
Learn
Task 2: Atoms, elements, compounds and mixtures
Task 2: Atoms, elements, compounds and mixtures
Task 3: Making solutions
Task 3: Making solutions
Task 3b: Make notes that:
Draw a diagram to show what happens to salt particles as they dissolve in water
Match the keywords to the definitions (they are not lined up correctly in the image )
Task 4: Making solutions - Working Scientifically
Task 4: Making solutions - Working Scientifically
Task 4b: Make notes that:
Identify the independent, dependent and control variables for the practical outlined on slide 4
Carry out the practical outlined on slide 4
Describe the effect of temperature on the amount of solute that will dissolve
Suggest why this happens (keywords: temperature, energy, particles)
Suggest improvements to be made to the method if you were to repeat the experiment
Suggest potential sources of error in the experiment
Task 4c: Complete the progress quiz
Task 5: Salt from rock salt
Task 5: Salt from rock salt
Task 5b: Watch the video
Task 5c: Make notes that:
Describe what is happening to the particles at each stage of the experiment.
What is happening at each step?
Why do we need to do it?
What do you have at the start?
What do you have at the end?
What is happening to the particles?
Can you think of any ways you could be wasting salt?
Task 5e: Copy and complete the evaluation table
Task 6: Chromatography
Task 6: Chromatography
Task 6c: Make notes that:
Describe the process of chromatography, including why it is useful
Explain why different dyes travel different distances
Task 6d: Answer these questions:
Why is it important that your start line is drawn with a pencil and not a pen?
Why shouldn’t you let your coloured dot dip into the water?
Pencil is insoluble so it will not run up the paper and mess up the results as the solvent moves through.
So that it doesn’t run into the water rather than up the paper
Task 6e: Look at the results below and then answer the questions
Why do different dyes travel different distances?
Which dye is the most soluble - explain?
Which dye is the least soluble - explain?
Which colours have the same dyes?
Because they have different solubility
Brown as it has moved the furthest up the paper
Turquoise as it has travelled the shortest distance up the paper
4 and 5, 2 and 3 both have yellow
Task 6f: Answer the exam questions and self mark
Task 7: Summarise
Task 7: Summarise
Task 7a: Complete the seneca learning units:
Check
Check
Task 8: - Complete the quiz to make sure you understand this unit. Make sure you can get the pass mark.
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