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Investigating What Effects The Rate Of A Reaction.

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Introduction

Chemistry Coursework. Investigating What Effects The Rate Of A Reaction. Calcium Carbonate + Hydrochloric Acid --> Calcium Chloride + Water + Carbon Dioxide. Ca2+CO32- + HCL --> Ca2+Cl- + H2O + CO2 Aim: For this assignment I am going to investigate the factors which affect the rate of a typical chemical reaction... the action of hydrochloric acid on marble chips. Theory: 'Collision Theory of Reaction' For a reaction to take place there must be a collision between the particles. Not every collision will cause a successful reaction because there may not be enough energy or the collision might not be powerful enough. For a successful reaction to take place there must be enough energy. Temperature of reactants. The higher the temperature of the reactants, the more energy they have. ...read more.

Middle

Method + Diagram's: 1) Weigh the Calcium carbonate using the scales and measure out the 50ml of Hydrochloric acid using a measuring cylinder. 2.a) Now pour the Hydrochloric acid into a conical flask and heat up to 80oC using a Water bath and a thermometer. Now add 0.1gm's of Calcium carbonate chips and bung. 2.b) Repeat as shown in 2.a but this time heat to 60oC. 2.c) Repeat as shown in 2.a but this time heat to 40oC. 3) Now pour the Hydrochloric acid into a conical flask and place into a container of Ice to reach 0oC using a thermometer. Now add 0.1gm's of Calcium carbonate chips and bung. 4) Now pour the Hydrochloric acid into a conical flask and place in the open air to reach 20oC using a thermometer. ...read more.

Conclusion

Evaluation: If I was to keep the experiment going then I would carry on and look into the effects on this experiment by looking into such factors as Variations on the size (surface area) of the chips, Variations of acid concentrations (1M, 2M, 0.5M etc), to gather the best environmental factors for this experiment to be performed under. Or I would carry on and find out more on the factor of temperature that I was looking into by looking at a different, in between temperatures to find out the optimum temperature for this experiment (65, 75, 55, 66, 69, 58oC). If I was to re-do this experiment then I would not change a lot just measure more accurately (time, chips, ml) and use sterilised utensils so that I do not enter any unwanted factors in to the experiment. Iain Rose. 09/05/07 1 ...read more.

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