The mole and concentration of solutions test questions - National 5 Chemistry Revision

1

What is the gram formula mass of oxygen?

16g

32g

8g

2

What is the gram formula mass of lithium chloride?

42.5g

7g

35.5g

3

What is the mass of 1 mole of carbon dioxide?

12g

28g

44g

4

What is the mass of 1 mole of sodium sulphate?

119g

71g

142g

5

How many moles are there in 24g of carbon?

2 moles

1 mole

0.5 moles

6

How many moles are there in 50g of calcium carbonate (CaCO₃)?

2 moles

1 mole

0.5 moles

7

What is the mass of 0.5 moles of magnesium chloride?

47.75g

95.5g

59g

8

What is the number of moles of potassium hydroxide used to make 100cm³ of 0.1 mol l^-1 solution?

10 moles

0.1 moles

0.01 moles

9

What is the concentration of hydrochloric acid solution used if 2 moles are dissolved in 100cm³ of water?

20 mol l^-1

2 mol l^-1

0.02 mol l^-1

10

What volume of sodium hydroxide is needed to produce a 0.1 mol l^-1 solution containing 0.5 moles of solute?

5 litres

5 cm³

50 litres