Kinetics A2

Multiple Choice

Which of the following factors can affect the rate of a chemical reaction?

• Catalyst, Surface Area, Temperature, Pressure

• Only Catalyst and Temperature

• Only Surface Area and Pressure

• Only Catalyst

Open Ended

Why is it important to understand the conditions that affect the rate of a chemical reaction?

Multiple Choice

Which of the following best describes what kinetics studies in chemistry?

• The speed or rate at which chemical reactions occur

• The color change during a reaction

• The products formed in a reaction

• The temperature at which a reaction occurs

Open Ended

Explain how temperature affects the rate of chemical reactions, using examples from daily life.

Multiple Choice

What happens to the rate of reaction when the concentration of reactants increases?

• It generally increases

• It generally decreases

• It stays the same

• It stops completely

Open Ended

Describe how increasing the surface area of a reactant can influence the rate of a chemical reaction. Use the diagrams to support your answer.

Multiple Choice

Which of the following is the correct unit for the rate of a chemical reaction?

• mol dm-3 s-1

• mol s-1

• dm-3 s-1

• mol dm-3

Open Ended

Explain how you would determine the initial rate of reaction from a concentration vs time graph.

Multiple Choice

Which methods can be used to monitor the rate of a chemical reaction?

• Titration/pH meter

• Change in volume

• Colorimeter

• All of the above

Multiple Select

Based on the methods listed in the Family Fortunes survey and the explanation of obtaining data for concentration-time graphs, which of the following are appropriate for monitoring the rate of a reaction involving acids or bases?

• Titration

• pH meter

• Electrical conductivity

• Colorimeter

Multiple Choice

For a reaction involving acids or bases, which techniques can be used to measure pH changes?

• Titration

• pH meter

• Colorimeter

• Both titration and pH meter

Open Ended

What is the purpose of using a suitable indicator such as phenolphthalein or methyl orange in titration experiments?

Multiple Choice

Which of the following is NOT a step in the procedure for performing titrations to obtain data for a concentration-time graph?

• Remove aliquot from reaction

• Stop reaction by quenching or cooling

• Titrate against an acid or base of known concentration

• Add a catalyst to speed up the reaction

Multiple Choice

Which of the following measurements can be used to monitor the progress of a reaction that produces a gas?

• Change in electrical conductivity

• Change in volume or pressure

• Colour change

• Formation of a precipitate

Multiple Choice

Based on the data and graph provided, what is the rate of reaction at t = 3000 s for the decomposition of SO2Cl2?

• 1.5x10^-4 mol dm^-3 s^-1

• 6.0x10^-5 mol dm^-3 s^-1

• 0.50 mol dm^-3 s^-1

• 0.20 mol dm^-3 s^-1

Multiple Choice

Which of the following best describes the trend in the concentration of H2O2 over time during its decomposition, as shown in the table?

• It increases steadily over time.

• It remains constant.

• It decreases rapidly at first, then more slowly.

• It fluctuates randomly.

Open Ended

Explain how you would determine the rate of decomposition of hydrogen peroxide at t = 20 seconds using the data provided.

Open Ended

Suggest one alternative method (other than measuring concentration) that could be used to monitor the rate of the decomposition of benzene diazonium chloride.