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Investigation of the reaction Rate of sodium thiosulphate and Hydrochloric.

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Introduction

Chemistry Coursework Investigation of the reaction Rate of sodium thiosulphate and Hydrochloric Acid and how temperature affects this What I am going to investigate I am going to investigate the rate of reaction between Sodium Thiosulphate and Hydrochloric acid, and how changing the temperature of the Thiosulphate will affect this. Equipment The equipment I will use for this experiment is: Bunsen Burner Beaker/conical flask Tripod Gauze Sodium thiosulphate Hydrochloric acid Safety glasses Paper marked with x Stop clock Thermometer Measuring cylinders Method In this experiment I will first place the paper with the X on to the surface. Now I will pour and measure as accurately as possible 30ml of Sodium Thiosulphate in to a large measuring cylinder and then pour the thiosulphate into a beaker. I will then place the beaker over the Bunsen burner on the gauze and heat to a certain temperature e.g. 30*c. I will now measure 5ml of Hydrochloric acid while the thiosulphate is heating. ...read more.

Middle

We also used average results to make sure the results were accurate and to compare. In two line graphs as you can see. Variables The key variables I used in this experiment are the temperature and time. This is because I will be changing the temperature of the Sodium Thiosulphate to record the time of the reaction. There fore the time will change every time the temperature does. The temperature is the most important variable because the experiment is based on this. Time is also important because you can change how long you leave the Thiosulphate on the Bunsen burner but this also depends on the temperature you want. We also test the reaction time so time is important in this experiment. WHAT DOES THE EXPERIMENT SHOW The experiment shows that the hotter the temperature of the Sodium Thiosulphate the faster the reaction time of the Hydrochloric acid and Thiosulphate. Previous practical work helped me understand the results of this experiment because I have done the same experiment before. ...read more.

Conclusion

However I still think I have enough results to draw a conclusion based on past results and practical work on the same experiment. After doing this experiment numerous times I have come to a conclusion based on past experiments and on experiment I have just done. The conclusion is that in all the experiments I have done the same thing has occurred. The hotter the Sodium Thiosulphate the faster the reaction time. Other experiments that could be carried out to extend this work Other work I could do is to change the concentration of the Hydrochloric acid and add Thiosulphate and test reaction time. We could change the concentration of the Hydrochloric acid and the temperature of the Thiosulphate, or vice versa, change the temperature of the Hydrochloric acid and change the concentration of the Thiosulphate. However this might not be as safe as the first or second experiments that I said could be extended work. Cheryl Kelsall Chemistry Coursework 9S 9:25 ...read more.

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