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Give the 2 equations of how you can find the rate of reaction
Amount of reactant used / time
Amount of product formed / time
How else could you possibly measure the rate of reaction?
Measuring the time taken for a solid to appear in a solution
If a gas is given off, you can measure the time taken to collect that gas
How can you find the rate of reaction from a graph?
The gradient
What is the relationship between rate and time?
They are inversely proportional; the faster the rate, the shorter the time
What does collision theory state?
Reactions can only occur if particles collide with enough energy to react
What is the minimum energy required for substances to react called?
Activation energy
What type of factors will increase the rate of a reaction?
Factors that increase the chance of collisions or the energy of particles
Give examples of factors increasing rate of reaction
Temperature
Concentration of solutions
Pressure of gases
Surface area of solids
Using a catalyst
How does surface area increase the rate of reaction?
Increasing the surface area exposes more of the solid. This means more frequent collisions, increasing the rate of reaction.
How does temperature affect the rate of reaction?
Temperature increases the speed of particles, so they collide more often and with more energy. This helps them reach the activation energy more quickly, increasing the rate of reaction.
Roughly by how much will the rate of reaction increase if the temperature is increased by 10 degrees?
Double
How can the rate of reaction be measured?
Measuring how much reactant is used
Measuring how much product is formed and the time taken
How does concentration or pressure affect the rate of reaction?
A higher concentration or pressure means particles are closer together and collide more often, increasing the rate of reaction.
How do catalysts work?
Catalysts speed up reactions by lowering the activation energy, so more collisions result in a reaction.
Why can catalysts be reused?
They change the rate of reaction but are not used up or consumed in the reaction.
