Rates Of Reactions Maud

Question 1

How do you measure the effects of changes in 
Surface area
Concentration of solutions
Temperature
Use of a catalyst?

Answer 1

React calcium carbonate marble chips with dilute hydrochloride acid

Measure the mass or volume of CO2 produced

By weighing the difference in mass of the reactants or the amount of carbon dioxide produced

Change the surface area by using smaller marble chips

Change the concentration by diluting the hcl

Question 2

For the reaction of hcl with calcium carbonate to occur…?

What happens?

Answer 2

Acid particles must collide with the surface of the marble chips

As the acid particles get used up, the collision rate decreases, so the reaction slows down.

Question 3

How do catalysts work?

Answer 3

Catalysts speed up the rate of reactions but aren’t used up in the process

It gives an alternate route for reactions with a lower activation energy (it does not lower the activation energy)