Rates of reaction

Question 1

How can rate of reaction be measured?

Answer 1

amount of reactant used or the amount of product formed over a time period

Question 2

When do chemical reactions occur?

Answer 2

when reacting particles collide with each other with sufficient energy

the amount of energy the particles must have to react is the activation energy

Question 3

What impact would increasing the temperature/pressure have on the rate of reaction?

Answer 3

it would increase because particles collide more frequently and more particles will have sufficient energy to react

increasing pressure would increase the frequency of collisions

Question 4

What impact would increasing the surface area/concentration of the reactants have?

Answer 4

increasing the surface area would give the reactants more reaction sites, so it would increase the frequency of collisions

increasing the concentration increases the frequency of reactions

Question 5

What are the function of catalysts?

Answer 5

change the rate of chemical reaction but are not used up during the reaction

different reactions need different catalusts

catalysts are used in industrial processes to reduce the cost of energy

however, different reactions need different catalysts