gay

1. Year 7 Science (2014)
1
Separation Challenge
Introduction:
You are a chemist who is working at a research lab named SuperChem, a laboratory which
develops methods for purifying substances. You have been given a mixture that needs to be
efficiently separated by your company. You will need to plan and separate the mixtures
following your individual methods. The techniques will need to be carefully undertaken and
detailed records of your work taken. As a guide for people repeating your work, you need to
describe the factors that affect the efficiency of the separation techniques and any issues of
safety.
Your task:
You are to design, construct, observe and report on separation techniques that will separate a
mixture containing salt, sand, iron fillings and sawdust into 4 pure substances. If successful
you should have four pure substances at the end of your experimentation. You are to complete
the following 3 sections:
Part A:
 Working in pairs you will need to decide on the separation techniques to use to get 4 pure
substances and then write a flowchart for these separation techniques.
 Leave enough space at the side of each separation step to explain why you chose this
technique to separate the mixtures.
Part B:
 Complete the Separation Technique proforma (pages 2 – 5) for each of your chosen
separation techniques and complete the experiment in class. Be sure to complete all
sections for each practical.
 Write a conclusion summarising the four separation techniques.
Part C:
 Select one separation technique that was not used in Part A.
 Create a fact sheet on this separation technique.
 Include as many interesting and relevant facts as you can on your chosen technique.
Submission of work:
 You will complete the practical work in pairs but you will each individually write up your
assignment.
 Remember to complete all three sections and present your assignment as a chemist would
present their work.

2. 2
Separation Technique 1:
Aim: (What are you separating?)
Sore dust, iron partials, sand and salt
Materials: (What equipment will you need?)
Strainer, magnet , bunsin burner and test tube
Method: (What steps will you follow to complete this procedure?)
1.we sraigned the mixture and got the sore dust out
2.we put a magnet though it
3.we wet the sand in a funnel
4.Put the water In a bowl
5.place over bunsin burner
6. get all the salt out of the bowl
Include an experimental set-up:
Take a photo of your experimental set-up. Using scientific diagrams, draw your
experimental set-up.
Results: (Use diagrams, pictures, and/or written explanations to record your results)
Discussion:
1. Describe in your own words how this technique separates the mixture.
The water evaporates from the bowl and the bowl is a special bowl that were you put the
bunsin burner flame over the bowl it will avaparate.
2. Which substance has been separated from your mixture? (you may include a photo)
The water evapartaed and the salt stayed and the salt was in the bowl when the water has
evaporated.

3. 3
3. How successfully did you carry out this technique? Was there any limitations or
improvements in this separation technique?
We successfully evaparted the water and left the salt and put all the sawdust and salt and
the other stuff in a jar.
4. Describe any safety issues there were when completing this experiment
You have to be cafful with the bunsin burnrer an make sure you don’t burn youeself.
Separation Technique 2:
Aim: (What are you separating?)
Materials: (What equipment will you need?)
Method: (What steps will you follow to complete this procedure?)
Include an experimental set-up:
Take a photo of your experimental set-up. Using scientific diagrams, draw your
experimental set-up.
Results: (Use diagrams, pictures, and/or written explanations to record your results)
Discussion:
1. Describe in your own words how this technique separates the mixture.

4. 4
2. Which substance has been separated from your mixture? (you may include a photo)
3. How successfully did you carry out this technique? Was there any limitations or
improvements in this separation technique?
4. Describe any safety issues there were when completing this experiment.
Separation Technique 3:
Aim: (What are you separating?)
Materials: (What equipment will you need?)
Method: (What steps will you follow to complete this procedure?)
Include an experimental set-up:
Take a photo of your experimental set-up. Using scientific diagrams, draw your
experimental set-up.
Results: (Use diagrams, pictures, and/or written explanations to record your results)
Discussion:

5. 5
1. Describe in your own words how this technique separates the mixture.
2. Which substance has been separated from your mixture? (you may include a photo)
3. How successfully did you carry out this technique? Was there any limitations or
improvements in this separation technique?
4. Describe any safety issues there were when completing this experiment.
Separation Technique 4:
Aim: (What are you separating?)
Materials: (What equipment will you need?)
Method: (What steps will you follow to complete this procedure?)
Include an experimental set-up:
Take a photo of your experimental set-up. Using scientific diagrams, draw your
experimental set-up.
Results: (Use diagrams, pictures, and/or written explanations to record your results)
Discussion:
1. Describe in your own words how this technique separates the mixture.

6. 6
2. Which substance has been separated from your mixture? (you may include a photo)
3. How successfully did you carry out this technique? Was there any limitations or
improvements in this separation technique?
4. Describe any safety issues there were when completing this experiment.
Conclusion:
What did you learn about the separation techniques? How could you change the separation
techniques to make it better? Consider which techniques worked well and which didn’t.