How Does the Changing the Concentration of Acid Effect the Rate of Reaction between Hydrochloric Aci
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Obtaining Evidence
Concentration (Acid and Water)
Time Taken (In seconds)
50 cm3 and 0 cm3
61
40 cm3 and 10 cm3
85
30 cm3 and 20 cm3
127
20 cm3 and 30 cm3
200
10 cm3 and 40 cm3
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 'how does ch ...
