Rates Of A Chemical Reaction

Question 1

What are the signs of a chemical reaction taking place?

Answer 1

. Gas being produced
. Change in colour
. Change in odor
. Change in temperature
. Formation of a solid (precipation)

Question 2

How do you increase the rate of a chemical reaction?

Answer 2

. Addition of a catalyst
. Smaller particle size/larger surface area
. Increased temperature
. Increased concentration

Question 3

How is a reaction successful?

Answer 3

The reactants must collide with sufficient energy and with the proper orientation.

Question 4

How does the temperature increase the rate of a chemical reaction?

Answer 4

If the temperature is increased, the particles have more energy and move quicker. And more frequent successful collisions.

Question 5

How does the concentration increase the rate of a reaction?

Answer 5

If the concentration of reactants is increased, there are more particles, therefore more successful collisions.

Question 6

How does decreasing particle size increase the rate of a reaction?

Answer 6

By decreasing the particle size of a reactant, we are increasing its surface area. The greater the surface area, the higher the chance of successful collisions.

Question 7

How does using a catalyst increase the rate of a chemical reaction?

Answer 7

If a catalyst is present, the reacting particles can collide more successfully with less energy.

Question 8

What is the rate of a reaction?

Answer 8

The rate of a reaction is a measure of how fast the reactants are being used up and how fast the products are being made.

Question 9

What are the advantages of using a catalyst?

Answer 9

The reaction can take place at lower temperatures because the particles can collide with less energy also a catalyst is not used up in a chemical reaction.

Question 10

In a kinetic energy diagram, what does the area under the graph represent?

Answer 10

Total number of particles