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Investigating the effect of temperature on the rate of reaction.

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Introduction

SCIENCE YEAR 10 COURSEWORK-Investigating the effect of temperature on the rate of reaction I am going to investigate how temperature affects the rate of the reaction: 2HCL (aq) +NS203 (aq) S(s) + 2NaCL (aq) +SO2 + H2O PLAN Background Information This reaction is a precipitate reaction as Sulphur is being produced. This reaction does not need a lot of heat to produce the precipitate. The rate of a reaction can be increased by applying any of the following: Increasing temperature- the particles have more energy so they are travelling at a higher speed, increasing the chance of collision Increasing concentration-there are more particles in the same amount of space so they are more likely to collide Adding a catalyst- the catalyst makes the particles react more easily and quicker Increasing Surface area- Allows the particles more space where they can collide with each their. ...read more.

Middle

2) Put the conical flask over a piece of paper with a cross printed on it. 3) Record temperature of Sodium Thiosulphate. 4) Measure 2ml of Hydrochloric acid using a burette into a test tube. 5) Get a stop clock. Add the acid to the solution and time how long the cross stays visible for. Record next to temperature 6) Thoroughly cleanse the conical flask and measure another 40ml of Sodium Thiosulphate. 7) Gently heat the Sodium Thiosulphate until it is 5C� hotter. 8) Repeat experiment until five different temperature readings have been recorded. I predict that the rate of reaction will increase as the temperature increase. ...read more.

Conclusion

* Also I will make sure the temperature of the Hydrochloric acid is always at room temperature * I will clean out all apparatus thoroughly so there cannot be a reaction with more than 40ml Sodium Thiosulphate and 2ml Hydrochloric acid. * I will start the stop watch when all of the hydrochloric acid has entered the solution. And I will stop the timer when the whole of the cross is invisible. Diagram I will measure the time in seconds and the temperature in C� Trial Experiment After doing a small trial experiment I noticed that using 2ml of Hydrochloric acid took a long time to react. There fore I decided to increase the amount used to 3ml. RESULTS I will be using the average of the 3 sets of results in my graph. ...read more.

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