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reaction rates - Coggle Diagram
reaction rates
Measuring rates
parts of a reaction which change the rate of a reaction
temperature
The higher the temperature the faster the reaction
This is caused by the larger amount of energy in the particles, causing them to come in contact more frequently
experiment showing this
https://cdn.savemyexams.com/cdn-cgi/image/f=auto,width=1920,w=1920/uploads/2023/10/7-1-2-investigating-effect-of-te.png
https://cdn.savemyexams.com/cdn-cgi/image/f=auto,width=1920,w=1920/uploads/2022/12/temperature-diagram-igcse-and-gcse-chemistry-revision-notes.png
Concentration
The higher the concentration the faster the reaction
This is because there will be more reactant particles in a given volume, allowing more frequent and successful collisions, increasing the rate of reaction
https://cdn.savemyexams.com/cdn-cgi/image/f=auto,width=1920,w=1920/uploads/2023/10/7-1-2-investigating-effect-of-te.png
https://cdn.savemyexams.com/cdn-cgi/image/f=auto,width=1920,w=1920/uploads/2023/02/concentration-of-solution-igcse-and-gcse-chemistry-revision-notes.png
surface area of a solid
The larger the ratio between the surface area and the area of the chemical the faster the reaction
This is caused because the 2 chemicals have a larger area of contact (more collision) meaning the reaction will be faster
experiment showing this
https://cdn.savemyexams.com/cdn-cgi/image/w=1920,f=auto/uploads/2021/08/3.2.1-Effect-of-Surface-Area-on-a-Reaction-Rate-1.png
https://cdn.savemyexams.com/cdn-cgi/image/w=1920,f=auto/uploads/2021/08/3.2.1-Effect-of-Surface-Area-on-a-Reaction-Rate-2.png
https://cdn.savemyexams.com/cdn-cgi/image/w=1920,f=auto/uploads/2021/08/3.2.1-Effect-of-Surface-Area-on-a-Reaction-Rate-3.png
https://cdn.savemyexams.com/cdn-cgi/image/f=auto,width=1920,w=1920/uploads/2022/12/surface-area-graph-igcse-and-gcse-chemistry-revision-notes.png
catalyst
A catalyst is a chemical which speeds up a reaction without being altered or consumed itself
They work by providing an alternate rout for the reaction
They do this by lowering the activation energy required, providing a reaction pathway requiring less energy
https://cdn.savemyexams.com/cdn-cgi/image/w=1920,f=auto/uploads/2019/12/Investigating-effect-of-catalyst-on-rate-reaction.png
https://cdn.savemyexams.com/cdn-cgi/image/w=1920,f=auto/uploads/2019/12/Effect-of-using-catalyst.png
Normally a small amount of catalyst is needed to speed up a reaction
Measuring rates are predicted by the collision theory
This theory says that if particles collide more during a reaction, the reaction will be faster