EASY
Upper Secondary: IGCSE
IMPORTANT
Earn 100

Look at the table and answer:

Soluble   Insoluble
All sodium, potassium and ammonium salts    
All nitrates    
Chlorides Except Silver and lead chloride
Sulphates Except Calcium, barium and lead sulphate but all other carbonates are insoluble
Sodium, potassium and ammonium carbonates    

Name two metals that have no insoluble salts.

Important Questions on Separating Substances

EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 2 - Separating Substances>Q>Q 3

Look at the table and answer:

Question Image

Name one other group of salts that are always soluble.

EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 2 - Separating Substances>Q>Q 4
Give three examples of solids you dissolve in water, at home.
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 2 - Separating Substances>Q>Q 4
Give three examples of insoluble solids you use at home.
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 2 - Separating Substances>Q>Q 5
Name two solvents other than water that is used in the home. What are they used for? 
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 2 - Separating Substances>Q>Q 6
Many gases dissolved in the water. Try to give some examples.
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 2 - Separating Substances>Q>Q 1
What does a pure substance mean? 
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 2 - Separating Substances>Q>Q 2
You mix instant coffee with water, to make up a cup of coffee. Is coffee is an impurity? Explain.
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 2 - Separating Substances>Q>Q 3
Explain why melting and boiling points can be used as a way to check purity.