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Investigating the effect of concentration on the rate of reaction between sodium thiosulphate and hydrochloric acid.
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Investigating the effect of concentration on the rate of reaction between sodium theosulphate and hydrochloric acid. Aim: To investigate whether the time taken for sodium theosuphate to go completely opaque when reacting with hydrochloric acid depends on the concentration of the acid. Prediction: I envisage that the higher the concentration of the acid, the faster the rate of reaction. I think this, as there will be more hydrochloric acid molecules do react with than if it were a lower concentration. Apparatus: hydrochloric acid, sodium theosulphate, 2 measuring cylinders, 2 pipettes, 1 conical flask, 1 stop clock and a pair of goggles. Diagram: Hazards: Hydrochloric acid- wear goggles Method: * First of all we gathered all the apparatus and set it up as in the diagram. * We drew a cross an a piece of paper and put a comical flask on top * We then poured 50 cm3 of sodium theosulphate into the...
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