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Does the concentration of acid affect the rate of reaction when mixed with water?
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Does the concentration of acid affect the rate of reaction when mixed with water? Plan I am going to investigate the effect of varying the concentration of Sodium Thiosulphate solution in a reaction with Hydrochloric Acid. The idea behind this experiment is that 'Increasing the concentration can increase the rate of the reaction'. For this experiment I am going to take at least two readings of time. I chose this reaction because it has a definite end point (when the cross disappears on the paper). The equation for the reaction is: Sodium Thiosulphate + Hydrochloric Acid Sulphur + Sulphur dioxide + Sodium Chloride + Water Equipment - 2 Measuring cylinders - Conical flask - Beaker - Stopwatch - Paper with cross marked on it - Sodium Thiosulphate solution - Hydrochloric Acid - Water Prediction I predict that the greater the concentration of Hydrochloric Acid solution the faster the chemical reaction will take place. Therefore, the cross will disappear more quickly due to the...
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