Chemistry Topic 6 (done)
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what is collision theory
a theory that says a reaction is caused by particles colliding
what are the 4 factors affecting the rate of reaction
-temperature -concentration or pressure -surface area -catalyst
how does a catalyst speed up a reaction
reduces the activation energy
how does temperature speed up a reaction
increases speed of particles and therefore increasing the frequency of collisions
how does concentration speed up a reaction
more particles in the same volume of water which increases the frequency of the collisions
how does surface area speed up a reaction
particles will have the same volume but a larger area for collisions to take place
what are the 3 ways to measure rate of reaction
-colour change -change in mass -gas released
how do you find the rate of reaction at a particular point
draw a tangent and find the gradient
where does the equilibrium shift to if temperature is increased
the side of the endothermic
where does the equilibrium shift to if the pressure is increased
the side with less molecules
where does the equilibrium shift to if the concentration is increased
the opposite side to the thing that is increased
where does the equilibrium shift to if the concentration is decreased
the side that is decreased in order to make more
how to you calculate mean rate of reaction
quantity formed/time taken
if the graph for quantity made is getting steeper what does this mean
the reaction is speeding up