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An Experiment to Investigate the Effect of Changing the Concentration of Hydrochloric Acid on the Rate of the Reaction between Hydrochloric Acid and Sodium Thiosulphate
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An Experiment to Investigate the Effect of Changing the Concentration of Hydrochloric Acid on the Rate of the Reaction between Hydrochloric Acid and Sodium Thiosulphate Aim When hydrochloric acid reacts with sodium thiosulphate the solution becomes cloudy and eventually opaque due to formation of sulphur. The time taken for the solution to become opaque i.e. a certain amount of sulphur to form can indicate the rate of reaction. In this experiment the effect of changing the concentration of hydrochloric acid on the rate of reaction below is investigated. The products of reaction are: * Sodium chloride, which will be in the aqueous solution and will appear colourless. * The solid sulphur, which forms in the solution, causes the water to look cloudy. It covers the black cross under the flask * Sulphur dioxide gas which smells like purgent. Prediction I predict that the rate of reaction above will increase as the concentration of hydrochloric acid increases....
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