Rates Of Reaction And Equilibrium

Question 1

What is rate

Answer 1

Rate is a measure of the change that happens in a single unit of time

Question 2

Which factors are important in determining the rate of reaction?

Answer 2

Surface area, temperature, concentration,catalyst

Question 3

What is equilibrium

Answer 3

That state in which both reactants and products are present in concentrations which have no further tendency to change with time.

Question 4

What is an acid

Answer 4

An H+ donor, turns litmus paper red, pH of 0-7

Question 5

Definition of a strong acid

Answer 5

A strong acid completely ionizes(dissociates) in a solution

Example: hydrochloride acid(HCl)

Question 6

Definition of a weak acid

Answer 6

A weak acid dissociates incompletely, releasing only some of its hydrogen atoms into the solution
Example: carbonic acid(H2CO3)

Question 7

What is an alkali

Answer 7

Alkalis are soluble based which produce OH-, turn litmus paper blue, pH 7-14

Question 8

What is a strong alkali

Answer 8

A strong alkali is completely ionised(pH14)

Example:sodium hydroxide(NaOH)

Question 9

What is a weak alkali

Answer 9

A weak alkali is only partly ionised(pH11-12)

Example: ammonia NH3

Question 10

What are some common household acids and bases

Answer 10

Citric acid(C6H8O7):citrus fruits, artificial flavouring
Hydrochloride acid(HCl): stomach acid
Carbonic acid(H2CO3): soft drinks

Question 11

Neutralisation

Answer 11

The cancelling out of an acid and base. The reaction of H+ with OH- ions in solution to form water.