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Find out if the rate of a reaction depends on the concentration of the solution by reacting sodium thiosulphate with different concentration of hydrochloric acid.
Member rating: No Rating | Words: | Submitted: Fri Oct 17 2003
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The aim: to find out if the rate of a reaction depends on the concentration of the solution by reacting sodium thiosulphate with different concentration of hydrochloric acid. The hypothesis: the higher the concentration, the faster the rate of the reaction because as the concentration of the acid increase, they is more hydrogen ions in the same volume of acid which react with the ions of the thiosulphate. That's when the solution becomes cloudy because sulphur is precipitated. As the precipitate gets thicker the cross from the paper disappears from view. Chemical requirements: I will use 0.25mol/dm3 to react it with different concentration of hydrochloric acid from 0.5mol/dm3 to 2.5mol/dm (all of these concentrations will be tested in turn going up in steps of 5mol/dm3). Formulae: Na S O + HCL ----- NaCL +H O +SO Apparatus: I am going to use the same stop watch...
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