Sodium Thiosulphate Essays

Sodium Thiosulphate Essays Sodium Thiosulphate Essay Sodium Thiosulphate Essay I am going to try and find out whether the reaction between Sodium Thiosulphate and Hydrochloric acid stays the same, increases or decreases when the temperature for both of the components is increased.Prediction: I predict that as the 2 components are heated the reaction will get quicker in time until a certain point. When the liquids reach a certain temperature the liquids will be too hot to make a reaction and there will be no reaction.Apparatus: for my experiment I will need: Bench Mat 2 Thermometers 1 Measuring Cylinder (25cmà ¯Ã‚ ¿Ã‚ ½) 30cm of Sodium Thiosulphate 30cm of Hydrochloric Acid 2 beakers X mat Water Bath Ice Box with cold water Stop watchApparatus Set up:X card Bench Mat Measuring Cylinders Water Bath Thiosulphate H2SO4Method: The first thing we need to do is to collect all of the equipment and set it up like in the diagram. Make sure that the heating or cooling element is at the right temperature for example make sure the water bath is at t he correct temperature and that the ice bath is as close to freezing as possible. Pour 10cmà ¯Ã‚ ¿Ã‚ ½ of sodium Thiosulphate into the measuring cylinder. Then pour 10cmà ¯Ã‚ ¿Ã‚ ½ of hydrochloric acid into a different measuring cylinder. Place a thermometer into both measuring cylinders. Once the temperature has reached the temperature you wish to do the experiment at then take them out of the cooler or heater. Then add both liquids into 1 beaker and start the timer. Stop the clock when the X has totally disappeared and record your results.Observations:When I am carrying out this experiment I am going to be measuring how long it takes for the Hydrochloric Acid and the Sodium Thiosulphate, to cloud over a X mark which will be placed underneath a beaker. I will be measuring the time in seconds. Despite the time going into the minutes I am going to count them as seconds. This is because when I am placing the results and plotting the graph on the computer the spreadsheet program that I am using will place the results In a different way because it will count the one minute as one second and place the result as one second which would be wrong.Results:Temperature in Degrees CelsiusTest No.1023304050133.441.02.0346.3319.3226.05246.521.02.7549.8921.0827.39320.751.12.7548.4219.2924.61438.921.04.6846.832627.43531.241.07.2145.3316.9928.86Average34.171.05.147.3620.5326.56High46.521.02.0349.892628.86Low20.751.12.6845.3316.9924.61The numbers ranging between 20.75 and 1.02.03 are the times in minutes, seconds and hundreds of second.Graph:Conclusion: I think that my prediction was correct as when we heated it above 45à ¯Ã‚ ¿Ã‚ ½C the liquids became inactive and the reaction went wrong. 2 of my experiments went wrong I think as they do look out of place on the graph. These are the experiments at 23à ¯Ã‚ ¿Ã‚ ½C and 30à ¯Ã‚ ¿Ã‚ ½C.Evaluation: After looking at my results and graphs I can see that my experiment was not a fair test as some of the results look like they have go ne wrong. So after discovering this I can virtually say that the results I have are unreliable. To make the test fairer the next time I carry it out I think that I should carry out each temperature out more than three times and instead carry them out another odd number of times like 5 or 7. This should enable me to gain better and more accurate results.Appendix:To help me out with this experiment I have used the following resources: AQA Modular Science FINAL EXAM, Higher Level Britannica 2001 Letts Science revision guide