How to write a chemistry evaluation Age 14 UK GCSE course (A* result)
Evaluation It can be concluded from the results that the experiment was successful. There was a very good quality of evidence with a good range of results found, from 2M to 0.8M that enabled a conclusion to be made. This was also a consistent range of results so there was not a gap on the graphs where one might have gone from 2M concentration straight to 1.4M concentration and then carried on at 1.3M concentration. The results were taken at a 0.2M interval from 2m to 0.8M. Sufficient results were found that gave good graphs enabling a comprehensive analysis of results to be made. The results were also found to be very reliable as having repeated each concentration three times, an almost exactly similar and reliable volume of gas collected was found for each repeat and each concentration. The results could possibly be improved by taking an even greater range of results to try to support and undermine the predictions, although a good range of results was taken in the experiment. Concentrations of 1.9M, 1.7M, 1.5M, 1.3M, 1.1M and 0.9M could be taken to give a wider range of results and also allow another analysis of doubling concentration between 0.9M and 1.9M. If there was more time for the experiment, results at concentrations below 0.8M could be taken although this might still not be possible because of the slow nature of the reaction at low acid concentrations.