Rates of reaction:- sodium thiosulphate + hydrochloric acid :: GCSE Chemistry Coursework Investigation

Rates of reaction- sodium thiosulphate + hydrochloric unpleasantPlan-We must originate a piece of coursework investigating the rates ofreaction, and the effect that changing whizz particular variable has onthe reaction term. The rate of reaction is the time it reads one ormore of the reactants to react or the time it takes to produce a newproduct from a chemical reaction. To work out the reaction time we use of goods and servicesthe formula.1 divided by time taken for reactionThere are five factors which affect the rate of a reaction, accordingto the strike theory of reacting particles1. temperature of consequence,2. concentration of solution,3. pressure of gases in reaction,4. surface area of reactants,5. Catalysts.For my preliminary experiments I have elect to investigate the effecttemperature and concentration have on a reaction. I have chosen toinvestigate these reactants because the are the most practical for thelab and equipment that I have available to use also it woul d take tomuch time to prepare a solid in powdered and unpowdered form, and itis difficult to get accurate readings due to the inevitabilities ofhuman errors, and as gas is in general colourless it is difficult to gaugea reaction changing the pressure, and if a substance is added to givethe gas colour, it may influence the outcome of the experiment.Similarly the use of a catalyst complicates things, and if usedincorrectly could alter the outcome of the experiment.My preliminary experiments showed me that it would me more practicaland time saving if I just altered the temperature of the solution aschanging the concentration of the solution was very time consuming.However the preliminary experiments also helped me to choose asuitable strength of solution.Aim-To promise the effects of a change in temperature on the rate of areaction. The reaction that will be used isSodium Thiosulphate + Hydrochloric Acid.Na2S2O3 (aq) + 2HCl (aq) .As I immovable after my preliminary experiments I wil l only carry outone experiment, temperature change whilst all other variables stayconstant. As both, sodium thiosulphate and hydrochloric acid aresoluble in water it means that I would be able to alter theconcentration of either of them. However I have chosen to vary thesodium thiosulphate as it is available in larger amounts. To alter thetemperature of the solution a water bath will be used to heat up theacid, thiosulphate and water to the necessary temperature.I decided on my range temperatures and the concentration that I woulduse during my preliminary series of experiments -I would be apply a concentration of 0.