sodium thiosulphate and hydrochloric acid
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The experiment will be done twice or three times if possible and the results will be made fair by the fact that only one thing will vary each time. Goggles and aprons will be worn at all times for safety. It has been decided that 5ml of HCl and 20ml of Na S O will be used.
Obtaining Evidence
These are the results of the experiments:
Temperature 1st results 2nd results Average Rate Of Reaction ( C) (seconds) (seconds) (seconds) (secs ) Room (approx.20) 74.5 69.9 72.2 13.85 30 38.1 38.3 38.2 26.18 40 35.9 39.4 37.65 26.56 50 20.7 18.1 19.4 51.55 60 12.3 9.9 11.1 90.09 70 5.9 5.2 5.55 180.18
Concentration 1st results 2nd results Average Rate Of Reaction (g/dm ) (seconds) (seconds) (seconds) (secs ) 15 125.2 123.5 124.35 8.04 20 74.5 69.9 44.2 13.85 25 53.6 51.2 52.4 19.08 30 49.6 51.6 50.6 19.76 35 45.7 48.8 47.25 21.16 40 22.6 30.5 26.55 44.35
Analysing evidence and drawing conclusions
All results have now been obtained and they seem to be quite good, all showing correlation. ...
