Reactions between HCL and Marble chips
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... 618 Analysing Evidence and Conclusions From looking at my results and graph I am able to conclude that the more concentrated the acid the quicker the reaction happened. There was a dramatic change in the amount of seconds it took to collect the gas as more water was added to the solutions. For example, if you look at the graph it shows how much longer it takes for the gas to be collected in the second half of the concentrations than the first half; this is shown by the black dotted lines. I find this hard to explain. As I look at my results, the more diluted the solution is the longer it takes for the gas to collect. Before I did the experiments I made some predictions they were that the more concentrated the acid was the quicker the reaction would happen and more carbon dioxide would be produced. This was completely correct because what I thought would happen, did. At this point we are able to answer our main hypothesis which was æhow does changing the concentration of acid affect the rate of reaction between hydrochloric acid and calcium carbonate. The answer to this would be that changing the concentration of the acid will either make it go slower ...
