eactants and products are used up/ produced.
Reaction rate = amount of reactant used up
If the amount used up is the same each time then the only thing
Where K is the constant for the reaction.
a) They have to collide with each other.
b) They need a certain amount of energy to break down the bonds of the
particles and form new ones. This energy is called the "Activation
When we increase the temperature we give the particles more
1) Makes them move faster which In turn makes them collide with each
2) Increases the average amount of energy particles have so more
particles have the "activation energy"
Both of these changes make the rate of reaction go up so we see a
decrease in the amount of time taken for the reaction and an increase in
time taken. Reflects the rate of reaction.
Because temperature has an effect on both the speeds at which the
particles react and the activation energy they have a greater effect on
the rate of reaction than other changes.
A change in concentration is a change in the number of particles
a) The particles are more crowded so they collide more often.
b) Although the average amount of energy possessed by a particle does
not change, there are more particles with each amount of energy;- more
particles with the activation energy.
a) is a major effect which effects the rate, but b) is a minor
effect which effects the rate very slightly.
In this experiment we are not concerned with whether the reaction
is exothermic or endothermic because we are concerned with the activation
energy needed to start and continue the reaction.
I predict that as we increase the temperature the rate of
If we increase the temperature by 100C the rate of reaction will
I predict that if we increase the concentration of the acid the
If the concentration of the acid doubles, the rate of the
The collision theory describes how the rate of...