2b.1 - Rate of Reaction

Question 1

What does the rate of reaction depend on? (4)

Answer 1

• Temperature
• Concentration
• Catalysts
• Surface area of solids

Question 2

How do you calculate rate of reactions?

Answer 2

Amount of reactant used or amount of product formed % time

Question 3

What three ways can the of reaction be measured? (3)

Answer 3

• Precipitation
• Change in mass
• Volume of gas given off

Question 4

How can you measure rate of reaction using precipitation? (2)

Answer 4

• If the product of the reaction is a precipitate then observe a mark through the solution and measure how long it takes for it to disappear
• The quicker it disappears the quicker the reaction

Question 5

What are the disadvantages of using precipitation to measure rate of reaction? (2)

Answer 5

• Only works for reactions where the initial solution is rather see-through
• Results are very subjective

Question 6

How can you measure rate of reaction using the change in mass? (3)

Answer 6

• Measuring the speed of a reaction which produces a gas can be done on a mass balance
• As the mass disappears it can be measured
• The quicker the reading drops, the faster the reaction

Question 7

What are the advantages of measuring rate of reaction using the change in mass? (2)

Answer 7

• Accurate

- Easy to plot a graph

Question 8

What are the disadvantages of measuring rate of reaction using the change in mass?

Answer 8

• Releases the gas straight into the room

Question 9

How can you measure rate of reaction using the volume of gas given off?

Answer 9

• Using a gas syringe to measure the volume of gas given off

- The more gas given off during a time interval, the faster the reaction