AS91166 - Chemical Reactivity

Question 1

Pressure

Answer 1

Force per area exerted by one object against another; force caused by gas molecules hitting the walls of the container

Question 2

How many moles does 2O2 have?

Answer 2

2moles

Question 3

To decrease pressure..

Answer 3

…the reaction which produces the lesser moles of gas will be favoured.

e.g. if the reactants have 2 moles of gas but the products have 1, the forward reaction would be favoured.

Question 4

Endothermic Reactions

Answer 4

Products have more energy than reactants.
Favoured when the temperature increases because heat must be removed from the system.

Question 5

Exothermic Reactions

Answer 5

Reactants have more energy than products.
Favoured when the temperature decreases, as heat must be added to the system.

Question 6

Do strong or weak acids dissociate fully?

Answer 6

Strong acids

Question 7

Examples of strong acids:

Answer 7

HCl, H2SO4, HNO3

Question 8

Examples of strong bases:

Answer 8

Metal hydroxides/sodium hydroxides - NaOH