3.5 Reaction Progress

3.5.1 Progress of a Reaction

LO: I understand how to follow the progress of a reaction.

Experiment:

calcium + hydrochloric calcium + carbon + water

carbonate acid chloride dioxide

Equation:

LO: I understand how to follow the progress of a reaction.

Graph:

The steeper the line, the the rate of reaction.

Volume of Carbon dioxide(cm3)

Time (s)

0

10

20

30

40

50

60

0 50 100 150 200 250

LO: I understand how to follow the progress of a reaction.

faster

3.5.2 Calculating the Rate

LO: I understand how to calculate the average rate of a reaction.

The rate of reaction is the change in quantity of a reactant or product per unit of time.

Average rate =

LO: I understand how to calculate the average rate of a reaction.

change in quantity

change in time

The units depend on the quantity and the time:

Change in mass per minute = Change in volume per second =

g/min or g min-

1

cm3/s or cm3 s-1