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Practical to find Ea

Does anyone know of a rates reaction that can be done in a school lab that can be used to get data to plot the graph to calculate activation energy for a reaction with a published value for Ea?
Original post by Pigster
Does anyone know of a rates reaction that can be done in a school lab that can be used to get data to plot the graph to calculate activation energy for a reaction with a published value for Ea?

Reacting HCl with Sodium Carbonate -- changing the concentration of HCl through dilutions and measuring the time it takes for the precipitate to dissolve. Then use your table of results to draw up a concentration/time graph with time in 1/t. Then draw a triangle to find gradient and complete the calculation of:
m(gradient) x -8.314 = Ea.

I'm rusty in experiments but I think this should be fine...
Original post by Pigster
Does anyone know of a rates reaction that can be done in a school lab that can be used to get data to plot the graph to calculate activation energy for a reaction with a published value for Ea?


Decomposition of hydrogen peroxide is probably the easiest.

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