Studied by 2 people
Reaction rate
Change in concentration of a reactant or product over time
Measuring reaction rate
Decrease in mass
Volume of gas given off
How long it takes precipitate to form
What does the gradient or tangent on a reactant or product/tome graph represent
Rate of reaction
Collision theory
Particles must collide at the correct orientation and with the correct energy to react
Factors affecting rate
Surface area
More particles are available to react
Concentration
Particles will be closer together
Pressure
Particles will be closer together
Temperature
Kinetic energy and speed increase and Particles have more energy
Catalysts
Alternate pathway of lower energy
What is the maxwell boltzmann distribution curve
Illustrates the point that;
Some molecules move slowly due to low kinetic energy
Others move fast due to high kinetic energy
Majority have moderate energies and speeds
Only molecules with energy greater than or equal to activation energy have sufficient energy
Features of the maxwell boltzmann distribution curve
Originates at the origin no molecules have 0 ke
Rises sharply to a peak representing most common ke before gradually decreasing
Total area is equivalent to the total number of molecules
Peak of a curve shows the most probable ke a molecule could have
On average the ke is a bit higher than the peak energy
What affect does increasing temperature have on the curve
Shifts it to the right
Catalyst
Substance that increases the rate of a chemical reaction by providing an alternative route with a lower activation energy without being used up
Note 
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