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Investigating the effect of Temperature on the reaction between Sodium Thiosuphate and hydrochloric acid.

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Introduction

Investigating the effect of Temperature on the reaction between Sodium Thiosuphate and hydrochloric acid. * Diagram * Planning I am investigating the different temperatures on the reaction between Sodium Thiosuphate and Hydrochloric acid. The factors I could investigate would be temperature, concentration and substances. I have chosen to investigate Temperature. I predict that the higher the temperature the more rapidly the cross would obscure. This is because the higher the temperature the more often the particles collide and react, when the particles collide more often they would collide harder because they have more energy, making the collisions bigger and faster, the collision success rate is higher. I will make my investigation a fair test by keeping the quantities of the Hydrochloric acid at room temperature and Sodium Thiosuphate heated as accurate as possible. Also make sure the stop clock is started at the same point each time a measurement is taken. I will carry out the investigation by: 1. Set up the Diagram 2. Put the test tubes of Sodium Thiosuphate into the beaker above the Bunsen burner 3. ...read more.

Middle

Results Sodium Thiosulphate Cm Hydrochloric Acid Cm Time Taken Cm 30 5 43.03 20 15 1.15 25 10 1.03 Results Target Temperature Actual Temperature Time Taken 60 60 12.06 55 55 14.64 50 51 16.00 45 44 20.39 40 41 24.46 35 36 28.78 30 30 34.99 25 24 49.10 20 21 54.99 15 15 69.09 * Because of time problems, we changed our experiment to: Method 1. Set up diagram 2. Hold Sodium Thiosuphate over the Bunsen burner until its at desired temperature, use thermometer to check 3. Keep acid at room temperature 4. Repeat the rest of the experiment the same, except only do once not twice. Obtaining I have made enough readings although it couldn't have been repeated I made readings at more regular intervals, they were taken every five; ten measurements were taken in total. My results are very accurate I measured the amounts at eye level on the desk, so the meniscus would have been straight and not to ones side; however I found it hard to pour in the two substances into the beaker at the same point with each reading. ...read more.

Conclusion

All these factors will have affected the experiment and made it more bias. These could be areas to work on in the future. Overall I think my results were reliable as these problems are minorities! I received once anomalous result, but quickly redid the test and my result became normal, I noticed this because it didn't fit into the pattern my results were forming. Overall I feel my experiment turned out well. However I could improve my investigation if I was to do it again by spending more time in getting the temperature exact to the designated one, but I do feel that my results were close enough and didn't cause much inaccuracy in the experiment. To extend my investigation I could investigate by using different substances and concentrations. I could also investigate the temperature of the hydrochloric acid in the experiment and use a larger range of temperatures, for example investigate beyond 60 and before 15 degrees; this would give a wider view on the experiment making it more accurate. ...read more.

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