C8 Rates And Equilibrium

Question 1

How can you calcuate the soeed of an reaction?

Answer 1

Product formed or amount of reactant used up / Time

Question 2

When does a reaction happen?

Answer 2

When 2 particles clooide with enough activation energy to start an reaction

Question 3

What is collision theory?

Answer 3

More collisions mean the faster the reaction is

Particles have to collise with enough energy to start an reaction

Question 4

What does the activation energy do?

Answer 4

Break the bonds of reactand to start the reaction

Question 5

What was increase rate of reaction?

Answer 5

Temorature
Consentration
Surface ares
A cataylist

Question 6

What does all methids of speeding up an reaction do?

Answer 6

Either
Increase the frequency of collisisons
Decrease the activation energy

Question 7

How do you calcuate the rate of reaction from 20s and 40 for exampe?

From a graph?

Answer 7

You find the values of 20s and 40s and then you calcuate the gradient

Question 8

Hwo do you find the rate of reaction at a particular point in a graph?

Answer 8

Draw a tangent and find it’s gradient

Question 9

What is an equilibrium?

Answer 9

An reaction going both ways but there is no overall effect and nothing looks like it is happening

Question 10

What is a reversabke reaction?

Answer 10

A reaction which the products react back to make the original reactants

Question 11

What dies it mean if the eauilibrium lies to the left?

Answer 11

The consentration of reactants is gretaer than the consentration of products

Question 12

What does it mean if the equilibrium lies to the right?

Answer 12

The consentration of product is greater than the consentration of the reactants

Question 13

What may effect where the equilibrium lies?

Answer 13

Temprature
Pressure
Concentration

Question 14

What is true about a reversable reaction?

Answer 14

The reverse reaction will the the opposite type (eg exothermic or endothermic) and the energy given out will be equal but opposite

Question 15

What happens when you heat blue hydrated copper II sulfate crystals?

Answer 15

The water dries of and it leaves white anhydrous copper II sulfate powder

Question 16

Describe the colour change when water is added to white anhrdrous … powder

Answer 16

Frow white to blue

Question 17

What is Le Chatelier’s Principle

Question 18

Because of Le Chatelier’s principek what do we know would happen if the temprature changes in an equilibrium?

Answer 18

If the temprature increased then the reaction shifts to the endothermic reaction

If the temorature decreased then the reaction eill shift to the exothermic reaction

Question 19

Because of Le Chatelier’s principle what do we know would happen if the pressure changes in an equilibrium?

Answer 19

Only effetcing gases

If preasure increases it moves to where there are fewer moles

Of pressure decreases the equilibrium tries to increase it by moving it in the direction of where there are more molecules of gas

Question 20

Because of Le Chatelier’s principle what do we know would happen if the consentration changes in an equilibrium?

Answer 20

If the consentration of the reactant increases tries to decrease it by making more products

If the consentration of the product decreases the system tries to increase it again by reducing the amount of products