Method
Firstly, I measured 50cm of Hypo using the measuring Cylinder and then put into a conical flask. The appropriate temperature was checked using the thermometer. It was at this point where I carried out the various temperatures.
At the appropriate temperature, 5cm acid was measured using the measuring cylinders and then added to the flask containing the hypo. I now placed the flask over the paper, which had a black dot on it that I had drawn earlier.
The stop clock was started immediately to make results more accurate and the time in seconds for the cross to disappear was recorded in a table like the one below. I carried this out from 20 c to 45 c. I used the Bunsen burner with a tripod and gauze to heat the solutions with.
I repeated me experiments twice to make sure my results were accurate.
Fair Test
To make my experiment a fair one, I had to look at a lot of things. Firstly, I looked at the factors that may have affected how well the investigation would work and these were things like using different equipment or doing the actual experiment in different conditions i.e. a colder/hotter environment. To make it a fair test I made sure that upon repeating the experiment, I used the exact same equipment and done it in the exact same environment to make absolutely sure that the experiment was fair at each temperature.
Results
Accuracy
I believe my results to be accurate because in both experiments the result was very much around the same time taken for the dot to become no longer visible.
Conclusion
During my investigation I discovered that the higher the temperature the faster the reaction would take place and the more accurate the answer is. This is very clear from my table of results. The reason for this is that the heat energy causes the molecules in the solution to move around faster and collide with other molecules causing the reaction to take place faster and more efficiently.
Evaluation
Overall I believe that my experiment was done very well and effectively without mistakes and to have conducted an accurate set of results. I could of improve my investigation by using more results and done more tests at higher temperatures to see if my theory carries on to boiling point.