Monitoring chemical reactions Higher - OCR Gateway test questions - OCR Gateway - GCSE Combined Science Revision

1

What is 20 cm³ in dm³?

0.002 dm³

0.02 dm³

0.2 dm³

2

2.0 mol of solute is dissolved in 0.50 dm³ of water. What is the concentration of the solution formed in mol/dm³?

0.25

1.0

4.0

3

What is the concentration of 0.100 mol/dm³ NaOH solution in g/dm³? (Relative formula mass of NaOH = 40.0)

0.0025

4.00

400

4

What is 5000 cm³ in dm³?

5.0 dm³

0.5 dm³

5,000,000 dm³

5

0.5 mol of solute is dissolved in water to make 2 dm³ of solution. What is the concentration of the solution in mol/dm³?

4 mol/dm³

1 mol/dm³

0.25 mol/dm³

6

What is the concentration of 2.0 mol/dm³ of sodium chloride solution in g/dm³? (Relative formula mass of NaCl = 58.5)

117 g/dm³

29.25 g/dm³

58.5 g/dm³

7

A solution has a concentration of 8.0 g/cm³. What mass of NaOH is in 5 dm³ of this solution? (Relative formula mass of NaOH = 40.0)

1.6 g

0.625 g

40 g

8

A solution of NaOH has a concentration of 4.0 g/dm³. What mass of sodium hydroxide is in 0.250 dm³ of this solution? (Relative formula mass of NaOH = 40.0)

16 g

1.0 g

0.0625 g

9

0.01 dm³ of hydrochloric acid solution contains 0.01 mol of dissolved hydrogen chloride. What is the concentration of the acid in mol/dm³

0.01 mol/dm³

1 mol/dm³

0.02 mol/dm³

10

What volume of 2.0 mol/dm³ of sodium hydroxide solution contains exactly 1.0 mol of sodium hydroxide?

2.0 dm³

3.0 dm³

0.5 dm³