topic 6 : rate and extent of reaction Flashcards
What is needed for a reaction to occur?
A chemical reaction occurs when reactant molecules successfully collide with one another to form products
What determines how quickly reaction takes place?
Collisions between molecules of reactants and how quickly they occur
What theory is used to understand rate of reaction?
The collision theory
State the collision theory
Particles collide.
An effective collision provides the energy needed for a reaction to take place.
What does the collision theory suggest about the speed at which a reaction occurs?
Spreed directly proportional to:
- number of collisions per unit of time between reacting particles
- fraction of these that are effective
What is the rate of a chemical reaction?
How quickly products are formed or how quickly reactants are used up
Therefore, how are rate of reactions measured?
Products formed / reactants used relative to time (/s)
Factors affecting rate of reaction
- Temperature
- Concentration
- Surface area
- Pressure
- Catalysts
- Nature of reactants
