Is the secretary guilty? | 14–16 years

Cold case chemistry resource index image

In this practical, your learners become chemical detectives by carrying out an investigation using separation techniques

In this practical, learners apply their knowledge of separation techniques to design and carry out a forensic investigation. After collecting evidence, learners write a group report describing their method, results and conclusion. An optional exam-style question allows learners to further demonstrate their knowledge and understanding of how chemical tests can be used to identify an unknown sample.

Make your lessons pop

Choose an account option to continue exploring our full range of articles and teaching resources

Free

Free access for everyone, everywhere. If you only need a few resources, start here.


What's included

  • One free teaching resource each month
  • Five free Education in Chemistry articles each month
  • Personalised email alerts and bookmarks