AP Chemistry Unit 5 Test

What is the reaction rate of:

2 AgI + Na2S → Ag2S + 2 NaI

• Rate= -Δ[AgI]/2(Δt)=-Δ[Na2S]/Δt= Δ[Ag2S]/Δt= Δ[NaI]/2(Δt)

• Rate= Δ[AgI]/2(Δt)= Δ[Na2S]/Δt= Δ[Ag2S]/Δt= Δ[NaI]/2(Δt)

• Rate= Δ[AgI]/2(Δt)=Δ[Na2S]/Δt= -Δ[Ag2S]/Δt= -Δ[NaI]/2(Δt)

• None

Tags

NGSS.HS-PS1-5

How to find the average rate

• Final - Initial

  ------------------

  Average slope

• Final - Initial

• Average slope (Final / Initial)

What is the symbol for the rate constant

Tags

NGSS.HS-PS1-5

Reaction Energy Profiles that are Endothermic have ______

• -Reactants are lower than products

  -Gained Energy

• -Reactants are higher than products

  -Lost Energy

• -Reactants and Products are the same

Tags

NGSS.HS-PS1-4

Reaction Energy Profiles that are Exothermic have _______

• -Reactants are lower than products

  -Gained Energy

• -Reactants are higher than products

  -Lost Energy

• -Reactants and Products stay the same

Tags

NGSS.HS-PS1-4

Catalyst

• Single step of overall reaction

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

• Causes reactions to have a higher rate by producing a neutron pathway with other lower activations

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

Tags

NGSS.HS-PS1-5

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

How to find the overall rate of a mechanism

• Choose a fast equation with the most compounds

• The slowest reaction in the mechanism

• The fastest reaction in the mechanism

• Findind the overall reaction and using it to find the overall rate

In a Multistep reaction energy profile, Each hill represents an _________

• Rate law

• Overall Reaction

• Elementary step

• Not here

What are the 3 ways a Catalyst works

• Catalyst could bind to a reactant

  -Orient the reactants more favorably

  -Create lower energy transition state

  -How Enzymes function

• Involve Covalent Bonding

  -Acid-base catalysts

  -Reactant or intermediate

  -Introduces new rxn intermediate and new elementary rxns

• Surface Catalysts

  -Reactant/ Intermediate binds to solid surface

Tags

NGSS.HS-PS1-5