9.2 Rate of Reaction Quiz

What is the mean rate of reaction in the first three minutes in cm³ per second? (Answer to 2 dp)

(a)  

What is the rate of reaction at two minutes in cm³ per second? (Answer to 2dp)

(a)  

How can the rate of reaction be calculated?

• By drawing a tangent to the curve at a specific point

• By dividing the amount of reactants used over the time taken

• By calculating the gradient of the curve at a specific point

• By dividing the amount of product formed over the time taken

What does a steep curve on a rate of reaction graph indicate?

• A high rate of reaction

• A low rate of reaction

• An average rate of reaction

• No reaction

What does a plateau on a rate of reaction graph indicate?

• The reaction is at its slowest

• The reaction is at its fastest

• The reaction is at its average rate

• The reaction has finished

What does the change in y represent on this graph?

• Change in the rate of reaction

• Change in the time

• Change in the volume of hydrogen

• Change in the amount of magnesium remaining

What is the change in x when calculating the gradient of a tangent?

• Change in the volume of hydrogen

• Change in the time

• Change in the amount of magnesium remaining

• Change in the rate of reaction

What is the correct formula to calculate the gradient of a tangent?

• Change in y divided by change in x

• Change in y multiplied by change in x

• Change in x divided by change in y

• Change in x multiplied by change in y

What are some correct units for the rate of reaction?

• Grams per second

• Grams per minute

• Centimeters cubed per second

• Meters per second

What is the correct way to calculate the mean rate of reaction?

• Multiply the volume of hydrogen produced by the time

• Divide the volume of hydrogen produced by the time

• Multiply the time by the volume of hydrogen produced

• Divide the time by the volume of hydrogen produced