Unit 8 (Kinetics) Questions to ask and things that come up when I do the practice I guess

Differential Rate Law Practice packet

• Is the way I showed my work okay? I forgot the exact format and I just wanted to clarify

Integrated Rate Law Practice Sheet

• Yo what’s up with the sig figs lsakdfalskdfjsaldkfj

Half Lives

• 0th order, half life increases with increasing concentration

• first order, half are always same regardless of concentration

• second order, half life decreases with increasing concentration

Kinetics MCQ Packet

• How much do we need to know about Arrhenius?

Reaction Mechanisms and Catalysts Worksheet

• What is a rate-determining step?

  • Slowest step in the reaction mechanism

• Make sure you know how to draw endothermic and exothermic potential energy graphs with slow and fast steps

• How does a catalyst increase the rate of rxn

  • A catalyst introduces a pathway that lowers the activation energy meaning that more molecules will have the required energy to collide and proceed with the reaction meaning that the reaction rate will be faster

  • Official answer:

    • Changes reaction mechanism (introduces extra step) and improves orientation of particle collisions

• Question 9, D and E

• 10

OWL Review

Collision Theory

• Activation Energy does not change with temperature

Molecularity

• Refer to the Notes

AP Classroom Practice

• Remember the forward reverse rate law thing

  • Steady State Approximiation

• kinetic control

Extra Practice Sheet

• temperature increases rate constant k

  • temperature is increased → molecules have more KE → speed of molecules increases → more collisions per unit of time

  • increased average KE of molecules → more molecules possess equal to or greater than activation energy → more effective collisions → rate of reaction

  • k depends on T not concentration