Biological Sciences
Nursing
Healthcare
Sports & Exercise Sciences
Pharmacology
Health Services
Forensic Sciences
Medical Research
Energy
Speech Therapy
Teaching
Physiology
Technician – Science & Technology
Dietician
Biochemistry
Biomedical ScienceMedical
Sales
Natural Science
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
HOW?Learning Outcomes:
(Grade C) (Grade B) (Grade A/A*)
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
Tests for ions
Ions revision • Atoms form ions by either gaining or losing
electrons
Na+ Ca2+
K+ 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.
Name that flame!
1= Sodium ions2= Calcium ions
3= Potassium ions4= Copper ions
Compound Flame colourLead chloride
Sodium chloride
Potassium chloride
Strontium chloride
Copper sulphate
lilac
Bright orange
Blue/white
Blue/green
Bright red
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).