Reaction Rates

Question 1

What is the activation energy?

Answer 1

The minimum amount of kinetic energy that particles need to react and break bonds

Question 2

Explain what the maxwell Boltzmann distribution graph is and it’s different parts?

What peak means

Average

Activation energy

Answer 2

Shows the kinetic energy of molecules

Area under graph shows total no of molecules

Starts at O,O cos no particles have zero energy

Peak of curve is most likely enegery

Mean and average is to right of peak

Activation enegery is at end only particles with more than that have enough energy to react

Question 3

What is on y and X axis of maxwell Boltzmann

Answer 3

Y no of molecules

X kinetic energy

Question 4

What factors increase rate of reaction and why

Answer 4

Temp more kinetic enegery 
Pushes maxwell Boltzmann to right
Faster collisions and more often so small rise in temp gives a big increase
Conc
Closer together 
Collide more often 
Preside 
Closer together
Catalyst 
Alternative pathway

Question 5

What is a catalyst

Answer 5

Substance that increases the rate of reaction by providing an alternative pathway with a lower activation energy. Catalyst is chemically unchanged at the end

Question 6

Explain sodium thiosulfate and hydrochloric acid reaction

Answer 6

Yellow precip
Time that it takes to measure rate of reaction

Measure volumes of both
Heat in water bath
Mix until cross disappears
Diff temps

Question 7

What is the equation for rate of reaction?

Answer 7

Rate of reaction= amount of reactant used or product formed/ time