GCSE Separation Challenge: Iron, Sulfur, Sand, and Food Dyes Mixture

Students are tasked with separating a mixture containing iron, sulfur, sand, and food dyes using various techniques. They work in pairs, following provided instructions and using specific equipment. Marks are awarded based on successful separation and organization. The challenge involves planning, executing the separation process, and creating a clear chromatogram. www.thescienceteacher.co.uk.

• GCSE
• Separation Challenge
• Mixture Separation
• Science Education
• Chromatography

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1. Topic The separation challenge! 1. To separate a mixture containing iron, sulfur, sand and two solid food dyes into its components Level GCSE (or for students aged 11- 16) Outcomes Instructions for teachers: this challenge should be used after you have taught separating techniques. Students are given a range of equipment (slide 5) and then work in pairs to solve the problem. Sulfur floats! Marks are awarded according to slide 6. There is an additional help sheet to support students with carrying out the chromatography step. www.thescienceteacher.co.uk | resources for science teachers who like to think

2. Separation Challenge!

3. Oops, I have a problem How many substances are in my mixture?

4. Your mission: Separate the mixture into its ? different substances. Iron filings Sulfur Sand Food colourings ?

5. You will be given: Plastic freezer bag (small) Magnet Filter paper Filter funnel Spatula Stirring rod 250 ml beaker x 2 Tongs 100 ml water in a wash bottle Magnifying glass Splint Paperclip Chromatography paper cut to size 3 small weighing boats Marker pen Measuring cylinder 50 ml

6. At the end of the challenge you should have: The iron, sand and sulfur in three plastic pots labelled with your names (2 marks) Have a clear chromatogram (4 marks) A tidy desk at the end (2 marks) We will weigh the mass of iron filings you have separated (4 marks)

7. 5 minutes! Thinking and planning time: How will you do the separation? In what order should you do the separation? Which equipment will you use? How will you do the chromatography? Top Tip! plan out what you are going to do on a piece of rough paper

8. 20 minutes Get separating! Iron filings Sulfur Sand Food colourings