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# Effect of temperature on rate of reaction

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Introduction

Effect of temperature on rate of reaction Aim: To find out if the temperature increases the rate of reaction of two chemicals. Prediction: My prediction is that the higher the temperature is the faster the rate of the reaction will be. Equipment: Hot water, thermometer, flask, cold water, stopwatch, tissue paper, paper with 'X' marked on it, safety glasses, measuring cylinder, large beaker, sodium thiosulphate, hydrochloric acid. Method: The experiment has to be done five times for the five different temperatures of the sodium thiosulphate. ...read more.

Middle

Once the sodium thiosulphate is the right temperature, take it out of the water, wipe the bottom of the flask with tissue paper and place it onto the piece of paper with 'X' marked on it. Now measure 5cm� of hydrochloric acid in the measuring cylinder. Then pour the hydrochloric acid into the sodium thiosulphate, at this moment start timing with the stopwatch and keep timing until you cannot see the 'X' mark through the liquid. Make sure you wear safety glasses and handle the acid carefully. ...read more.

Conclusion

Also make sure you time the experiments accurately. Observation: My observation was that when the temperature of the sodium thiosulphate was higher the solution turned cloudy quicker. Results: Temperature (�C) Time for cross to disappear (minutes) 20 2.49 30 1.21 40 1.08 50 0.29 60 0.23 Conclusion: My conclusion is that the higher the temperature the quicker the reaction is. My evidence is shown in the table above, because 60�C takes less time than 20�C. My prediction was correct, because the higher the temperature is the faster the rate of reaction would be. To improve my experiment I would do the experiment 3 times for each temperature and then use the average of the 3 results. ...read more.

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