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).