Rates Of Reaction Flashcards
what is meant by the rate of a reaction
how quickly the reactants turn into products
how do you calculate the average (mean) rate
amount of reactants or products
/Time
what is the independent variable
the thing you change
what is the dependent variable
the thing you measure
what is the control variable
what you keep the same
surface area & rate
-smaller chips = larger surface area 2 volume ratio
- so there are more particles available to react
- particles collide more frequently
- which increases the rate of reaction
temperature & rate
- as temperatures increase particles gain more energy
-they move faster causing more frequent collisions
-more likely to have energy greater than the activation energy
-Which increases the rate of reaction
concentration & rate
-more particles per unit volume
- higher frequency of collisions
-Which increases the rate of reaction
rate & catalysts
- catalysts lower the activation energy providing an alternate reaction pathway
- increased number of successful collisions
- which increases the rate of reaction
pressure & rate
- higher pressure = higher particle concentration
- with particles closer together collisions are more frequent
- more likely to have energy greater than the activation energy
- which increases the rate of reaction
what are potential errors in an experiment
- gas escape
- wrong measurments
- wrong timings
- inconsistent temp
how to improve an experiment
- more repeats
- wider range ofo intervals
- higher resolution measuring cylinder
how to calculate rate at a specific point
- Draw a straight line tangent on graph
- Calculate the gradient
what happens to the rate each time the temperature of a reaction is increased by 10 degrees
the rate of reaction doubles
