Monitoring Reactions

Question 1

What is reaction rate? (1 mark)

Answer 1

⦾ Change in amount of reactants or prroducts per unit time (1)

Question 2

What are the units if the reactants were in a solution?

1 mark

Answer 2

⦾ mol/dm/s / change in conc. per sec (1)

Question 3

What is continous monitoring? (1 mark)

Answer 3

⦾ Recording product/reactant amount at regular time intervals (to find ROR) (1)

Question 4

Explain how gas volume can be used to meaure rate of reaction? (5 marks)

Answer 4

⦾ Gas given off (1)
⦾ collect in gas syringe (1)
⦾ record how much you've got at regular intervals (1)
⦾ draw concentration-time graph (1)
⦾ units - conc/sec (1)

Question 5

Which equation is often used in experiments where you’re collecting gases? (1 mark)

Answer 5

⦾ Ideal gas equation - pV = nRT (1)

Question 6

What is the ideal gas equation used to find out? (1 mark)

Answer 6

⦾ no. of moles of gas (1)

Question 7

What are the number of moles of the gas from the ideal gas equation used to work out? (1 mark)

Answer 7

⦾ conc. using c = n/v (1)

Question 8

What are the 2 equations used to work out concentration from

Answer 8

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