Chemical Equilibirum

Question 1

Is chemical equilibrium reversible or non reversible?

Answer 1

1)Reversible reaction is one which the products react with to give back the reactants

2)The reaction is going in both directions

Question 2

What is chemical equilibrium?

Answer 2

State of dynamic balance where the rate of the forward reaction is the same as the rate of the backward reaction

Question 3

What is dynamic equilibrium?

Answer 3

The forward and backward reactions continue at equal rates

Question 4

What is Le Chateliers principle?

Answer 4

States that if a stress is applied to a system at equilibrium, the system re-adjusts to relieve the stress applied

Question 5

What reaction is this?

-92

Answer 5

Exothermic

Question 6

What reaction is this?

+92

Answer 6

Endothermic

Question 7

What reaction occurs when temperature increases?

Answer 7

Endothermic

Question 8

What reaction occurs when temperature decreases?

Answer 8

Exothermic

Question 9

What occurs to the moles of gas when temperature increases?

Answer 9

Move to the side with fewer gas molecules

Question 10

What occurs to the moles of gas when there is a decrease in pressure

Answer 10

Move to the side with the greater number of gas molecules

Question 11

What does Le Chateliers principle predict?

Answer 11

1)In all gaseous reactions an increase in pressure will favour the reaction that brings about a reduction in volume

2)It will shift towards the side with small molecules

Question 12

What experiment is used to illustrate Le Chateliers Principle

Answer 12

A reaction between Iron (III), Chloride and Potassium Thiocyanate

Question 13

What is the theory behind the experiment?

Answer 13

Some reactions involving iron compounds are suitable for illustrating Le Chateliers Principle because they also involve clear colour changes

Question 14

What is a control used in this experiment?

Answer 14

In order to be able to compare colours formed from the original colour