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To find out what will make the reaction go faster or slower.

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Introduction

Aim:- To find out what will make the reaction go faster or slower. Background Information:- For a chemical reaction to take place particles need to clash into each other. To make a reaction go faster you can heat up the liquid or make the liquid more concentrated. The rate of reaction can be measured by repeating it three times as well as adding more water. Key Factors:- Factors that will affect the reaction are the heat and the amount of water. The things that are varying is the amount of thiosulphate solution and the amount of water. I'm keeping the temperature the same. Method:- Equipment - Measuring cylinder x3 - Sodium thiosulphate solution - Hydrochloric acid - Stop watch - Beaker - Distilled water - White paper with black cross on it - Chronicle flask Step to step method: First you have to get the equipment from the list above. ...read more.

Middle

After each test the volume of thio went down, the acid stayed on 25ml and the volume of water rises by 5ml, until we had 5ml of thio and 25ml of water. If a result didn't fit in we done it again. Fair Test:- To ensure that the test was far we kept the temperature the same the acid the same and the type of Thio and water the same but not the volume. Precise and Reliable Readings:- To ensure that I got precise and reliable readings I will make sure that the water I use is pure, I don't mix the beakers up and finally that I repeat each experiment 3 times. These points will help me get precise and reliable readings. ...read more.

Conclusion

This is because there are less thio particles because it is diluted with water therefore it causes the thio and acid particles to react slower with each other. Evaluation:- We did the test 3 times to see if we had any odd results. The odd results are coloured in blue. We then repeated them at the end to make them more accurate and clear. I think two things that made it inaccurate are measuring the volume of water and thio incorrectly, also when we were looking out for the cross to disappear, when my partner thinks the cross has disappear I can still slightly see it. I think this is a very inaccurate way to carries out this experiment. TAHAM - 05-21-2003 - 09:23:44 ...read more.

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