Worksheet: Reaction Rate Measurements

In this worksheet, we will practice finding the rate of a reaction by plotting the masses or concentrations of reactants or products.

Q1:

Which of the following is not a viable unit for a reaction rate?

  • Akg/s
  • Bt/d
  • CM/min
  • Dh/s
  • Eg/s

Q2:

The rate of a reaction can be determined by measuring changes in the physical properties of the reaction mixture. Which of the following parameters is not typically monitored to obtain a measure of reaction rate?

  • ATemperature
  • BVolume
  • CColor
  • DCloudiness
  • EMass

Q3:

What is the formula for calculating the rate of a reaction from the reaction time and the amount of product formed?

  • A R a t e o f r e a c t i o n t i m e a m o u n t o f p r o d u c t f o r m e d =
  • B R a t e o f r e a c t i o n a m o u n t o f p r o d u c t f o r m e d t i m e =
  • C R a t e o f r e a c t i o n a m o u n t o f p r o d u c t f o r m e d t i m e = × 1 0 0 %
  • D R a t e o f r e a c t i o n t i m e a m o u n t o f p r o d u c t f o r m e d = × 1 0 0 %
  • E R a t e o f r e a c t i o n a m o u n t o f p r o d u c t f o r m e d t i m e = ×

Q4:

Shown in the diagram is the experimental apparatus used to identify the end-point of a reaction from changes in turbidity. The average reaction rate is determined by measuring the time taken for the cross to be obscured by the product suspension.

When monitoring changes in turbidity, the cross must be viewed from directly above. How does this approach help to ensure that the experiment is repeatable?

  • AThe cross is not viewed through glass, which would reduce its visibility by adhering to the solid product.
  • BThe cross is viewed through a minimum depth of liquid.
  • CThe cross is viewed through a constant depth of liquid.
  • DThe cross is not viewed through glass, which would reduce its visibility by refracting light.
  • EThe cross is viewed over the largest possible area.

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