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rate of reaction

            
            
            
            
            
             10cm3 of de-ionised water A concentration of 1.
            
            
             Large medium small and powdered chalk chips (calcium carbonate).
             Burette and Burette clip.
             Filter funnel.
             Clamp and stand.
             Stopwatch.
             Safety Spectacles.
             Cotton wool.
             Procedure.
             To Begin the Experiment I first set up the apparatus as shown in the diagram below. The filter funnel is used to fill the burette as the acid can easily be spilt trying to fill the small neck of the burette. The funnel was their basically to prevent the acid spilling and therefore was used as a safety precaution.
             Next the experiment began with the 1.00 grams of marble chips being weighed out using the scales. This was done as accurately as possible but on some occasions it was necessary, due to the sizes of the chips to only be able to use a bit under or a bit over the 1.00 grams as planned. However the new weight of the chips was also recorded for future reference.
             After weighing out the marble chips the various sizes were reacted with the Hydrochloric acid. The acid was diluted to a concentration of 1 Molar again due to safety reasons as not hurt us to much if it was spilt. The acid was diluted by mixing 10cm3 of Hydrochloric acid with 10cm3 of De-ionised water to create a total of 20cm3 of Hydrochloric acid at 1.0 Molar. De-ionised water was used in order to make the experiment fairer because normal tap water does containing lots of different chemicals which may affect the reaction. For example some of the chemicals in the tap water may help to dissolve the marble chip creating a faster reaction speed and giving anomalous results. The De-ionised water was however used throughout the experiments to create a fair test environment.
             Once the marble chip had been added the total weight of the conical flask and everything contained in it was recorded at this time the stopwatch was also started. From then onwards the weight of the conical flask and everything in it was recorded every 10 seconds for a total of 100 seconds.


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