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Concentration and rates of reaction - "Disappearing cross" experiment.
Member rating: No Rating | Words: | Submitted: Fri Sep 19 2003
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Concentration and rates of reaction - "Disappearing cross" experiment Aim I am investigating the effect of the concentration of Hydrochloric Acid on the speed of the reaction between Sodium Thiosulphate and Hydrochloric Acid. When these react together, sulphur is formed. A balanced chemical equation for the reaction is... Na2S2O3 + 2HCl --> S + 2NaCl + SO2 + H20 Apparatus * Total of 10cm3 of distilled H20 * Total of 15cm3 of HCl * Total of 125cm3 of Na2S2O3 * Paper with cross - to see how long it takes for cross to disappear under flask * Conical flask - to hold solutions needed for experiment * 2 measuring cylinders - to measure out correct amounts of solutions * 2 beakers and 2 pipettes - to contain solutions before going into the conical flask. The pipettes are for accurate measuring of the solutions. Method 1. I will put a big black cross on a piece of paper, the size of the bottom...
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