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rates of reaction - Coggle Diagram
rates of reaction
catalyst
The rate of a reaction can be increased by adding a suitable catalyst. A catalyst is a substance which increases the rate of a chemical reaction but it is not used up (remains chemically unchanged at the end).
Only a very small amount of catalyst is needed to increase the rate of reaction between large amounts of reactants.
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surface area
The rate of a chemical reaction can be increased by using smaller solid particles which increases the surface area of a solid reactant. This is done by cutting the substance into small pieces, or by grinding it into a powder. If the surface area of a reactant is increased:
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Compared to a reaction with lumps of reactant, the graph line for the same reaction but with powdered reactant:
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concertration
The rate of a chemical reaction can be changed by altering the concentration of a reactant in solution. If the concentration is increased:
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Compared to a reaction with a reactant at a low concentration (if a solution), the graph line for the same reaction but at a higher concentration
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temperature
The rate of a chemical reaction can be changed by altering the temperature. If the temperature is increased:
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Compared to a reaction at a low temperature, the graph line for the same reaction but at a higher temperature
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