Reaction Mechanism, Intermediates, and Catalysts

Under the collision theory, the particles must collide with  ____ and ____ for a reaction to occur.

• sufficient rate and sufficient energy
• sufficient surface area and correct orientation
• sufficient catalyst and sufficient energy
• sufficent energy and correct orientation

How do we identify an Intermediate?

• Formed during the reaction, and used up again later

• Formed during the reaction and unused later

• Is always at the start (reactants) and the end (products) of the mechanism

• All reactions with low activation energy

How do we identify a catalyst in a mechanism?

• It's used up and reformed again

• It's used up

• It's just in the products

• It's formed during the reaction and used up in a later step

What kind of reaction is this?

• Endothermic
• Exothermic
• Cannot be determined

Tags

NGSS.HS-PS1-4

What is the catalyst in the following rate mechanism?

• HBr
• H₂O
• There is no catalyst

Tags

NGSS.HS-PS1-5

How many intermediates are in the following rate mechanism?

• 0
• 1
• 2
• 3

Which is the rate determining step?

• 1
• 2
• 3

Tags

NGSS.HS-PS1-5

Which letter corresponds to the activation energy of the forward reaction?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-4

What are the Intermediates?

• CO and HCO₂CH₃

• CO₂CH₃ and HCONH₂

• CO₂CH₃ and NH₃

• No Intermediates in this mechanism

How many Intermediates does this mechanism have?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-4