Large medium small and powdered chalk chips (calcium carbonate)

· 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 i

· 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. By doing it every 10 seconds it gave readings fairly quickly which was important as the gas would probably be produced very quickly and so results will also need to be taken at a relatively good speed. The results will be taken for 100 seconds to give a good picture of what happens in the reaction not just a few seconds of it. From earlier experiments with marble chips and hydrochloric acid I found that it “fizzes” which creates a kind of splash which may actually spray out of the top of the conical flask. To stop this I put a clump of cotton wool in the neck of the flask this acted like a shield to prevent splashes of acid escaping from the flask while the reaction is was taking place. Cotton wool was used as it is able to let the gas through but not the larger water molecules.

Some topics in this essay:
Molar De-ionised, Begin Experiment, Concentration Pressure, Flask Weighing, marble chips, Burette Burette, Spectacles Cotton, hydrochloric acid, conical flask, marble chip, de-ionised water, rate reaction, · experiment, cotton wool, 100 grams, weight conical flask, 10cm3 de-ionised water, 10cm3 hydrochloric acid, faster reaction,