Disappearing X Experiment. Coursework about sodium thiosulphate and hydrochloric acid. Method, Results, Fair Testing, Evaluation included. Was marked with a passing grade.
Date Submitted: 11/27/2004 17:39:23
Category: / Science & Technology / Chemistry
Length: 2 pages (673 words)
Category: / Science & Technology / Chemistry
Length: 2 pages (673 words)
Disappearing X Experiment
Introduction
I am going to investigate the rate of reaction between sodium thiosulphate (thio) and hydrochloric acid.
Hydrochloric Acid + Sodium Thiosulphate "" sodium chloride + water + sulphur
The reactants are both colourless, but one of the products, sulphur, is yellow, so we can use this fact to follow the rates of reaction. I am going to investigate how the concentration of the acid effects the speed of the reaction.
Apparatus
1 small measuring cylinder
1 large …
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…a faster reaction. If the solution is diluted, there aren't as many acid particles to collide with the thio particles and so the reaction is much slower.
Results
/mins
Acid/cm3Water/cm3Reaction Time 1Reaction Time 2Average Reaction Time
2501.522.332.12
2052.092.432.26
15102.242.542.39
10153.053.383.21
5204.585.555.26
/secs
Acid/cm3Water/cm3Reaction Time 1Reaction Time 2Average Reaction Time
250112153132.5
205129163146
1510144174159
1015185218201.5
520298355326.5
Analysis/Conclusion
We discovered that 25cm3 hydrochloric acid and 25cm3 sodium thiosulphate solution had the fastest reaction rate, just as we had predicted.
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