of reaction’ means ‘how fast is the reaction’.
It can be measured as
A reaction will continue until one of
the reactants is used up.
of rocks is a very slow reaction,
of sugar to alcohol is quite slow but you can see the carbon dioxide bubbles
forming in the 'froth'!
‘fast’ reaction would be magnesium dissolving in hydrochloric acid,
explosion and burning/combustion reactions would be described as ‘very
To measure the ‘speed’ or
‘rate’ of a reaction depends on what the reaction is, and can what is formed
be measured as the reaction proceeds.
Methods to find out reaction speeds :
- measure time for a reaction to be
- measure amounts of product
produced in a period of time
- measure amounts of reactant
remaining in a period of time
[ Exothermic and endothermic changes ] [ Energy level diagrams ] [ Activation energy ] [ Rates of reaction ] [ Factors affecting rate of reaction ]