MrBadmusSummer Second Half

Year 7 · Summer Second Half

Chemistry

3 lessons from 1 unit.

Unit C3 · lessons 5 to 7 of 7

Mixtures and separation

Almost nothing you meet is one pure substance. This unit is about telling what is in a sample, getting the parts back out again, and the one test that settles whether something is pure when looking at it cannot.

  1. 05DistillationProcessSea water is almost all water, and you still cannot drink it. How do you get a pure liquid back out of a mixture?Open this lesson
  2. 06ChromatographyProcessFour black inks look identical on paper. How could you tell which pen wrote the note?Open this lesson
  3. 07Proving something is pureInvestigationSomeone hands you a white powder and tells you it is pure. Believing them is not chemistry — so what measurement would make them prove it?Open this lesson

Back to all three sciences this half term The whole KS3 Chemistry course