Finding Average Rate of Reaction from Immeasurable Quantities
- In some reaction, some changes are observable but difficult to be measured. For example
- Change in colour
- The time taken for the colour of a reactant to change or certain amount of precipitate to form can be used to measure the rate of reaction.
- If the quantity change is immeasurable
Example When the aqueous of ethanadioic is mixed with acided potassium manganate(VII) , the reaction happen slowly at room temperature. The purple colour of the solution is bleached after 20 seconds. Calculate the average rate of reaction. Answer Rate of reaction = 1/time = 1/25 =0.04 s-1