Rate of Reaction Coursework :: GCSE Chemistry Coursework Investigation

An experiment to find the prize of reception between two liquids psychiatric hospitalThis is an experiment to determine the effect of changing theconcentration of sodium thiosluphate (Na S O (aq)) on the rate ofreaction between sodium thiosulphate and hydrochloric acetous (HCL (aq)).HCl+sodium thiosulphatearrowsodium chloride+sulphurdioxide+sulphur+water.HCl(aq) + Na2S2O3(aq) arrow NaCl(aq) + SO2(g) + S(s) + H2O(l)If matchless were to lay hydrochloric superman and sodium thiosulphate into abeaker a white cloudy result is left(a) in the beaker. The rate of thereaction can be controlled by concentrating one of the liquids, or onecould add water to dilute the mixture to backward the reaction.Method ApparatusTwo beakers of 50cm3Sodium ThiosulphateHydrochloric dotConical flaskfulMeasuring tube-10cm3Measuring tube-50cm3The apparatus is set up as shown above. I go out trust 50cm3 of SodiumThiosulphate I bequeath keep Hydrochloric paneling at a perpetual rate of5cm3. Then I l eave behind reduce the sodium thiosulphate and increase thewater, for example50cm3 0cm340cm3 10cm330cm3 20cm320cm3 30cm310cm3 40cm3When the reaction is complete the solution left should be white andcloudy, to test this I will place a magical spell of reputation with a cross onit. If I cannot see the cross on the paper then the reaction hasfinished.Constants* Hydrochloric acid* Temperature* Length of X on paper* Room temperatureVariables Sodium thiosulphate urineHydrochloric acid will be kept at a constant rate because theexperiment is about changing the concentration of sodium thiosulphate.The temperature will be kept constant with a precise thermometer inthe solution. The paper with the X on it will always be the same pieceof paper. The room temperature will be kept constant because I willmake sure the windows argon closed.Sodium thiosulphate will be wide-ranging because that is the point of theexperiment. The water will be varied to dilute the reaction.scientific explanationIn order for the sodium thiosulphate and Hydrochloric acid to reacttheir particles moldiness* Collide with each other* The collision must have adequacy zip fastenerThis is shown by the explanation belowThe particles in the liquid If the collision has enough If thecollision move around continually. energy, a reaction takes place doesnot have here an acid particle is enough energy about to collide with a no reaction sodium subatomic particle occurs. The acid particle bounces away again.If on that point are a pass out of collisions then the rate of the reaction isfast. If there are not many, the rate is low.The rate of a reaction depends on how many successful collisions thereare in a given unit of time.There are three main ways of speeding up a reaction* Changing the concentration