The rate and extent of chemical change Flashcards
1
Q
How is the rate of a reaction calculated?
A
Rate of reaction = amount of reactant used or product formed / time
2
Q
What are the various units for rate of reaction?
A
Mass / Time
Volume / Time
Moles / Time
3
Q
Name three common ways of measuring rate of reaction.
A
- Loss of mass of reactants
- Volume of gas produced
- Time for a solution to become opaque
4
Q
Describe measuring the rate by monitoring mass loss.
A
- Place the reaction flask on a balance.
- In these reactions a gas is produced so record the mass loss in time intervals.
- plot a graph of mass / Time.
5
Q
Describe measuring the rate by monitoring the gas produced.
A
- Connect a gas syringe to the reaction flask.
- Measure the gas produced at intervals.
- plot a Volume / Time graph.
6
Q
Describe measuring the rate by monitoring the disappearance of a cross.
A
