AP chem u5 revision

What order is this graph?

• Zero

• First

• Second

• Third

Which step of a reaction mechanism determines the rate?

• the slow step

• the fast step

• the first step

• the second step

What order is the half life of Carbon¹⁴?

• Zero

• First

• Second

How does a catalyst speed up a reaction?

• Adding more reactant

• Providing a pathway that has a lower activation energy

• Increasing the activation energy

• Increasing binding energy

If a “reaction profile” has a taller ‘hill’ (or activation energy) then the reaction is ____________________?

• Faster

• Slower

What are the 2 characteristics that an effective collision must have? SELECT TWO

• Enough energy to overcome E_a

• Molecules in the correct orientations

• High enough temperature

• Apporpriate intermediates present

What is the rate law for the reaction with this slow elementary step? A + 2B --> D + C

• rate = k[A]²

• rate = k[A][B]²

• rate = k[A][B]

• rate = k[A]

What is NOT a way to speed up a reaction

• Add a catalyst

• Decrease the volume

• Increase the concentration of reactants

• Increase surface area of the solid

• Decrease the pressure

Intermediate

• Series/Collectio of baby reactions that add up to give a reaction equation

• Something created in an early step that is used later on

• Appears first as a reaction, regenerated first appear as product after later step

For 2A + B → 2C, the rate of production of C has been found to be 12 M/s. During that reaction, the rate of reaction was?

• 12 M/s
• 24 M/s
• 6 M/s
• Cannot tell without more data