2.2.9 Rate Equations in Chemistry

What is a rate equation?

• A mathematical equation that calculates the effect of changing variables on a reaction

• An equation that determines the rate of reaction based on the concentration of reactants

• An equation that predicts the time it takes to reach a destination using different modes of transport

• An equation that measures the speed of a reaction in terms of concentration changes

How is the rate of a reaction measured?

• In terms of the change in temperature during the reaction

• By calculating the number of moles of products formed

• By determining the time it takes for the reaction to occur

• In terms of how fast the concentration of a reactant is falling

Which of the following statements is true about the rate expression?

• It shows the effect of changing concentration on the rate of reaction

• It determines the overall rate of the reaction

• It calculates the time it takes for a reaction to reach completion

• It measures the equilibrium constant of the reaction

Which of the following factors does NOT affect the rate of a chemical reaction?

• Concentration of reactants

• Temperature

• Presence of a catalyst

• Colour of the reactants

• 1

• 2

• 3

• 4

Which method is commonly used to determine the order of a reaction experimentally?

• Colourimetry

• Titration

• Method of initial rates

• Gravimetric analysis

If the concentration of a reactant is doubled and the rate of reaction quadruples, what is the order of the reaction with respect to that reactant?

• 0

• 1

• 2

• 3

What is the effect of a catalyst on the rate of a chemical reaction?

• It increases the rate by providing an alternative pathway with a lower activation energy

• It decreases the rate by increasing the activation energy

• It has no effect on the rate of reaction

• It changes the equilibrium position of the reaction