Topic 6: rate and extent of chemical change

Question 1

You can find the rate of reaction by…

Answer 1

the amount of product formed, or reactants used up over time.

Question 2

The steeper the line on a rate of reaction graph…

Answer 2

the faster the rate of reaction.

Question 3

The line on a rate of reaction graph levels out…

Answer 3

as the reactants are used up.

Question 4

The more frequent the collisions…

Answer 4

the faster the reaction takes place.

Question 5

particles must collide with enough______ for it to be successful.

Answer 5

energy

Question 6

would increasing the concentration of the solutions increase the rate of reaction?

Answer 6

YES

Question 7

would increasing the temperature increase the rate of reaction?

Answer 7

YES

Question 8

would increasing volume NOT concentration of the solutions increase the rate of reaction?

Answer 8

NO

Question 9

would increasing the surface area increase the rate of reaction?

Answer 9

YES

Question 10

What is the name of the minimum amount of energy particles must have if they are to react?

Answer 10

Activation energy

Question 11

Why does a catalyst cause the rate of reaction to increase?

Answer 11

it decreases the activation required

Question 12

What two properties of the collision between particles affect the rate of reaction?

Answer 12

Energy

Frequency

Question 13

Using collision theory why does increasing concentration increase the rate?

Answer 13

because the higher the concentration the more particles you will have this means chance of successful collision is higher.

Question 14

Name one more change other than concentration and surface area that change the rate of reaction.

Answer 14

Temperature

Question 15

The rate of reaction can be measured by dividing the amount of _____ used up or the amount of _____ formed by the _____.

Answer 15

1) reactants
2) products
3) time

Question 16

To find the rate at a particular time from a graph with a curved line of best fit, you have to find the _____ of the _____ at that time.

Answer 16

1) gradient

2) tangent

Question 17

to find the rate of reaction you can measure the ____ or the ______ of ___

Answer 17

Mass

Volume of gas

Question 18

What is a dependent variable?

Answer 18

something that depends on other factors.

Question 19

What is an independent variable?

Answer 19

the variable the experimenter changes or controls.

Question 20

Name a piece of equipment that could be used to measure the volume of gas produced

Answer 20

Gas syringe

Question 21

True or false, at equilibrium all the reactants have reacted to form products.

Answer 21

False

Question 22

True or false, at equilibrium the amount of products is equal to the amount of reactants.

Answer 22

False

Question 23

True or false, at equilibrium the rate of the forwards reaction is equal to the rate of the backwards reaction.

Answer 23

True

Question 24

True or false, at equilibrium both the forwards and the backwards reactions stop.

Answer 24

False

Question 25

Does an endothermic reaction take in heat or give out heat?

Answer 25

Takes in

Question 26

Does an exothermic reaction take in heat or give out heat?

Answer 26

Give out

Question 27

True or false, if you change the conditions of an equilibrium reaction the reaction will try contradict the change.

Answer 27

True