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The effects of concentration on the rates of reaction

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Experiment: The effects of concentration on the rates of reaction AIM: I am investigating the effects of the change in the concentration of a chemical on the rate of reaction PREDICTION: I predict that by increasing the amount of thiosulphate this will speed up the rate of reaction between the chemical and the acid. BACKGROUND THEORY There are many ways in which to effect the speed in the rate of reaction. These include: 1. Temperature - By increasing the temperature the faster the particle moves and the more collisions occur and this speeds up the rate of reaction. 2. Surface area - There are more particles that are able to react and therefore an increase in the surface area leads to a increase in the rate of reaction 3. ...read more.


EQUIPMENT Burettes x 2 Pipette x 1 (10cm3) Pipette filler Hydrochloric acid Sodium thiosulphate Distilled water Clamp stand Stop clock Conical flask Beaker Goggles and laboratory coat Funnel Burette To be fixed into clamp stand for holding upright and place funnel on top and will be used to hold water and thiosulphate Pipette To be used to draw off hydrochloric acid from bottle Pipette filler This will be used to draw off slowly the acid. Stop watch To measure time taken for reaction to occur Beaker This will be filled with acid to ensure that the acid can be added to the solution in one amount Conical flask This will contain thiosulphate and water together and this is where the reaction will occur. Funnel This is used to ensure that the liquid does not spill out on to table. ...read more.


5. You then take a conical flask and place a certain amount according to the table overleaf of sodium thio-sulphate and then water into the flask. 6. Draw off the 10cm3 of hydrochloric acid using the pipette and pipette filler and squeeze into the beaker. 7. Pour swiftly the hydrochloric acid from the beaker into the conical flask containing the mixture of water and sodium thio-sulphate. 8. And as soon as you put the acid from the beaker start the stop-watch. 9. Observe the cross on the paper which was slowing disappearing because of the mixture getting milky. 10. As soon as u see that the cross in completely disappeared stop the stop-watch and record the time it took for the reaction. 11. Repeat this process taking the correct amount of solution according to the table overleaf. Conclusion: ...read more.

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