AP Unit 5

What order is this graph?

• Zero

• First

• Second

• Third

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

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

___________ are produced in one step and used up in a later step and __________________ are present and unchanged in the reactants and the products

• intermediates, catalysts

• catalysts, intermediates

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 + A --> B + B

• rate = k[A]²

• rate = k[B]²

• rate = k[A][B]

• rate = k[A]

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

• rate = k[A]²

• rate = k[B]²

• rate = k[A][B]

• rate = k[A]

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]