C3a - Rate of reaction (1)

Question 1

What is the rate of reaction

Answer 1

a measure of the amount of product formed in a fixed time period

Question 2

What are some common units for the rate of reaction (2+2)

Answer 2

g/s or g/min

cm3/s or cm3/min

Question 3

What are the laboratory apparatus needed to measure the rate of reaction producing a gas (2)

Answer 3

gas syringe

flask

Question 4

Why does a reaction stop

Answer 4

One of reactants (limiting reactant) completely used up, so reaction cannot continue

Question 5

How and why does the amount of product formed vary? (2)

Answer 5

the amount of product formed is directly proportional to amount of limiting reactant used

the greater the amount of limiting reactant there is, the more reacting particles there are, so the more product is formed

Question 6

What is the limiting reactant

Answer 6

the reactant not in excess that is all used up at the end of the reaction

Question 7

How is the rate of reaction calculated from a graph?

Answer 7

the rate of reaction is the gradient or slope of the line on a graph of amount of product against time