Topic 8.4-8.6

Question 1

What are the tests for cations

Answer 1

Flame test and Precipitation reactions

Question 2

What are the tests for anions

Answer 2

carbonation ions, halide ions, sulfate ions

Question 3

What is the method for the flame test

Answer 3

• Use a metal wire which you first put in HCl to get rid of any contamination
• dip the wire into your compound and put it in your flame

Question 4

What colour does the flame turn with Li+ (Lithium)

Answer 4

Crimson

Question 5

What colour does the flame turn with Na+ (Sodium)

Answer 5

Yellow

Question 6

What colour does the flame turn with K+ (Potassium)

Answer 6

Lilac

Question 7

What colour does the flame turn with Ca2+ (Calcium)

Answer 7

Red/Orange

Question 8

What colour does the flame turn with Cu2+ (Copper)

Answer 8

Blue/Green