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Unit 8: Rate of reaction - Coggle Diagram
Unit 8: Rate of reaction
8.1: Measuring the rate of reaction
If a gas is made in a reaction, measuring the volume of the gas produced in a given time is often the best way to measure the rate of the reaction.
When a result does not fit a pattern we call it an anomalous result.
The rate of reaction can be measured by the amount of product made in a given time or amount of reactant used.
8.3: Surface area and the rate of reaction
An increase in the total surface area gives an increase in the rate of reaction.
The rate of reaction increases because the reaction can only take place with the particles on the surface of the solid.
When a solid lump is cut into pieces, its total surface area increases.
8.4: Temperature and the rate of reaction
As the temperature is increased the rate of reaction increases.
When particles have more energy they move faster, and collide more often and with greater energy.
8.5: Concentration and the rate of reaction
As the concentration of the reactants is increased, the rate of reaction is increased.
When there are more particles in a given volume they are more likely to collide with each other.
8.6: Catalysts
A catalyst is a substance which speeds up a chemical reaction.
A catalyst is not changed in the reaction and can be recovered and re-used.
8.2: Changes in the rate of reaction
The slope of the graph of the results is a measure of the rate of reaction.
The more collisions between particles of reactants there are in a given time, the faster the reaction.
The rate of reaction changes with time.