Biological Sciences Forensic Sciences Medical Research Physiology Medical Sales Healthcare Nursing Biochemistry Health Services Natural Science Pharmacology Teaching Technician – Science & Technology Sports & Exercise Sciences Biomedical Science Speech Therapy Dietician Energy Each year is split into 3 units. All three together are worth 100% of the total AS Level: AS: Unit 1: Science at Work – portfolio. (33%). Unit 2: Analysis at Work – portfolio. (33%). Unit 3: Monitoring of the Human Body – Exam. (33%). Each year is split into 3 units and is worth 100% of the total A2 Level: A2: Unit 8: Investigating the Scientist’s Work– portfolio. (33%). Unit 9: Sampling, Testing & Processing - Exam. (33%). Unit 15: Applications of Biotechnology. (33%). Testing for ions Tests for ions Learning Outcomes: (Grade C) (Grade B) (Grade A/A*) HOW? Name some ions that produce different coloured flames and produce coloured precipitates Recall the colour of flames or precipitates produced by barium, copper, potassium, & strontium Deduce the ion present in a compound when given the flame colour or precipitate information Ions revision • Atoms form ions by either gaining or losing electrons + Na + K 2+ Ca Br Identifying elements • In a laboratory, pure elements are available and usually labelled. • In other areas, the presence of particular elements is unknown and must be tested. • Flame tests are used to confirm the presence of some elements. 1. Flame tests • Positive ions produce different flame colours. • We can use these colours to find out what positive ion a compound contains. Carrying out flame tests • You will be using Hydrochloric acid • This is dangerous! • In all experiments, you should work with an awareness of GLP (Good Laboratory Practice). • Get into the habit of recording everything! • Watch Miss Fergus demonstrate. • GOGGLES ON! • Off you go. 1= Sodium ions 2= Calcium ions 3= Potassium ions 4= Copper ions Compound Lead chloride Flame colour Blue/white Sodium chloride Bright orange Potassium chloride lilac Strontium chloride Bright red Copper sulphate Blue/green Homework: Hand in September first lesson • Throughout the course you must identify the vocational context for each investigation. • You have done some testing for ions. • Write a 2-3 page report titled “Industries that use ion testing and how they use these results.” • Include a referenced bibliography. You need: • B in your Year 11 Additional GCSE. • 43 points overall (average of B/C for all subjects).