The effect of temperature on the reaction between Sodium Thiosulphate (Na2S2O3) and Hydrochloric Acid (HCl) :: GCSE Chemistry Coursework Investigation

Investigating the effect of temperature on the answer mingled with Sodium Thiosulphate (Na2S2O3) and Hydrochloric Acid (HCl)Planning and PredictionApparatus Listconic Flask3 measuring cylindersSodium Thiosulphate (Na2S2O3)Hydrochloric Acid (HCl)ThermometerStop catchWhen sodium thiosulphate reacts with hydrochloric acid, the solutionbecomes opaque. I allow investigate how the rate of this reply isaffected when the experiment is carried out at different temperatures.The reaction that occurs produces randomness dioxide, water and sodiumchloride. GRAPHThe rate of chemical reactions can be affected by a number of things changes in surface celestial sphere changes in concentration of the reactants changes in temperature conduceed substances called catalysts and changes in pressure if the reactants are gases.In most chemical reactions the rate changes with time, normallyslowing down.PredictionI pull up stakes be investigating the effect that tem perature has on thereaction between sodium thiosulphate and hydrochloric acid. I predictthat the higher the temperature, the faster the reaction ordain occur.This should happen because when heat is applied to a solution theparticles in the compounds hunt down faster and therefore come into contactwith the other substance to a greater extent rapidly. More importantly, thecollisions are more energetic. An increase in collisions provides more cypher than there is in the activation energy, so the reaction isfaster.Preliminary probeIn order to discover what ratio of HCl to Na2S2O3 I needed to dispensea preliminary experiment, changing the concentration of the variousreactants.I provide need a time of two or three legal proceeding at 20C, my lowesttemperature, because I predict that the reaction will speed up as thetemperature is higher, and I do not indirect request the reaction to happen injust three or quaternion seconds once I get to 60C as it will be difficultto measure the t ime accurately. GRAPHIt was discovered by and by the preliminary experiments that there hadbeen some contamination so the results were inaccurate. With a largeramount of Na2S2O3 than HCl the experiment should have happened slowernot faster.After but trials I discovered thatWater 40mlsNa2S2O3 10mlsHCl 5mlsgave me an adequate starting time of almost 300 - 330 minutesat 20C.As a result of my preliminary investigation I will add water to dilutethe Na2S2O3, as otherwise it is too concentrated and the reaction