Rate of reaction between Hydrochloric Acid and Calcium Carbonate Essay

Rate of reaction between Hydrochloric Acid and Calcium Carbonate Calcium carbonate reacts with hydrochloric acid to form carbon dioxide gas. One way of following the rate of reaction at which it reacts is to measure the volume of carbon dioxide produced at certain time intervals during the reaction. CaCO + 2HCl CaCl + H O + CO =========================== Calcium Carbonate + Hydrochloric Acid Calcium Chloride + Water + Carbon Dioxide Equipment --------- Delivery tube Conical flask Hydrochloric acid Calcium carbonate chips Burette Beaker Electric scales Measuring cylinder Tub Water Electric timer Goggles Retort stand The different factors that can affect my experiment are the temperature, the concentration of my reactants and the surface area, also adding a catalyst. We have decided to test different concentrations of hydrochloric acid for our experiment because it will give us sufficient results to make our evidence reliable. RATE OF REACTION BETWEEN HYDROCHLORIC ACID AND CALCIUM CARBONATE LOW CONCENTRATION HIGH CONCENTRATION I think that during our experiment, the higher the molarity of acid the quicker the rate of reaction will be, I think this because of the collision theory. If the solution is made more concentrated, there will be more particles in the solution. This makes collisions between important molecules more likely and will collide more often. At the beginning of the reaction, there are lots of reactants particles (and no products). This means a lot of productive collisions between reactants. As time goes on these reactants will become less and less (because reactants have been turned into products), therefore less collisions, so the rate of reaction will slow down. If the molarity of the acid concentratio... ...act same size we could use 2 chips in one experiment and get 1g then we could use 4 chips in another experiment and still get 1g. This meant that the surface area for the hydrochloric acid changed in each experiment for it to react and collide with. I could have stopped this by sieving so I would get chips that are of the same or close enough the same surface area. Overall my results are fairly reliable, yet could be subjective to change if better methods were available. If I was to do my experiment again I would make sure I would do it all on the same day and maybe change the limits of the products so that the results we got could be more accurate and we would have less anomalous results like the 2.5 molar experiment. However, if I did this experiment again I would expect the same results and patterns that I have got apart from the 2.5 molar and 3 molar experiments.