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Science Coursework
Member rating: No Rating | Words: | Submitted: Tue Feb 14 2006
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Science Coursework Sumaiya Vora 10z Title Investigation on how the rate of reaction between sodium Thiosulphate and hydrochloric acid is affected when the concentrations of sodium Thiosulphate are changed. Aim: ? I am going to investigate how the rate of reaction is affected when the concentration of sodium Thiosulphate is changed. The experiment will be done by mixing the various concentrations of sodium Thiosulphate with hydrochloric acid and by timing how long it takes for a cross to disappear. This will be able to be done because one of the products of the reaction is sulphur, which is an insoluble substance. As it forms the mixture becomes cloudy and the cross will eventually won't be seen. Word and Symbol Equation Sodium + Hydrochloric Sodium+ Sulphur+ water + sulphur Thiosulphate Acid Chloride dioxide (Aq) (g) (L) (s) Na2S202 + 2HCL 2NaCl+S+H2O+SO2 Background Information ? Sodium Thiosulphate Sodium Thiosulphate is a chemical used in photography. If a clear solution of sodium Thiosulphate was mixed with hydrochloric...
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