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Investigating The Rate Of Reaction Between Sodium Thiosulphate And Hydrochloric Acid

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  • Essay length: 1487 words
  • Submitted: 05/10/2004
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GCSE Aqueous Chemistry

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Investigating The Rate Of Reaction Between Sodium Thiosulphate And Hydrochloric Acid

In this coursework I am going to be investigating the rate of reaction between sodium thiosulphate and hydrochloric acid. The rate of reaction can be changed by theses 4 factors:

1. Temperature

2. Concentration

3. Catalyst

4. Surface area

For this course work I have decided to find out how concentration affects the rate of reaction between Sodium Thiosulphate and Hydrochloric Acid. The equation for this reaction is:

Sodium Thiosulphate + Hydrochloric Acid Sodium Chloride + Sulphur + Sulphur Dioxide + Water

Na2S203(aq) + 2HCL (aq) 2NaCl(aq) + S(s) + SO2(g) + H2O(l)

When Sodium Thiosulphate and Hydrochloric Acid are mixed together, the solution turns from a colourless solution to a cloudy colour gradually change again into a yellow colour solution (This is called Sulphur). Because the solution turns from a colourless liquid to a cloudy colour solution we could use this information to show how concentration affects the rate of reaction. This experiment I am going to carry out is both simple and safe. I will be carrying out this experiment in the school laboratory because of the

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