1. Define the following terms
Chemistry?
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………………………………………………..
Solution?
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………………………………………………….
2. The table show the solubility of different salts and how each can dissolve when it is added to 100g of
water at 20 °C
solute
Solubility (measured in grams) of solute in 100g of the solvent at 20
°C
Sodium chloride
36
32
Copper sulphate
74
Calcium chloride
7
Potassium chlorate
Lead chloride
1
a) What is a saturated solution?
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………………………………………………….
b) How much potassium chlorate would dissolve in 200g of water at 20°C?
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
c) How much copper sulfate will dissolve in 100 g of water at 20 °C.
………………………………………………………………………………………………………………………………………………………………
d) How much sodium chloride would dissolve in 50 g of water at 20 °C?
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
e) Use the data in the table to draw a bar chart to show the solubility of the various solutes in 100 g of
water at 20 ° C
3. 204 g of sugar dissolve in 100 g of water at 20 °C
a) How much sugar will dissolve in 200g of water at 20 °C?
b) How much sugar will dissolve in 50g of water at 20 ° C?
c) How much sugar can be dissolve in 250 g of water at 20 °C?
5. Copy and complete
An ………………………………………………. Is a substance made up of only one type of …………………………………….
It can be broken down into any ……………………………………………..substances.
6. What is the difference between an atom and molecule?
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
7. Complete the table below
Atom
symbol
Hydrogen
C
Oxygen
Chlorine
Zn
Fe
Copper
8. Two or more atoms bonded together are called?
………………………………………………………………………………………………………………………………………………………………….
9. What is a solute?
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………………………………………………..
10. Complete the table below
Name of molecule
Hydrogen sulfide
chlorine
methane
H2S
Cl2
CH4
Diagram of molecule
Chemical formula