Sodium Thiosulphate & Acid :: GCSE Chemistry Coursework Investigation

atomic number 11 Thiosulphate & AcidPlanningTo ensure that this experiment is safe, I have taken some precautions.I wore goggles at each times, made sure non to spill any chemicals suchas the acid onto skin or clothes, and to be aware of glass.I have utilize various different apparatus, including two measuringcylinders, one 25ml, and the other 50ml. I used a 150ml chronicle flask and a stopwatch. Here is a a few(prenominal) diagrams of these apparatus.What I Will Vary, Not Change To Keep A Fair Test & What I WillObserve & MeasureI will divert the amount of Sodium Thiosulphate (10-50ml), but keepingthe same amount of Hydrochloric Acid (25ml) to make it a fair test.Also when I vary the amount of Sodium Thiosulphate, I will always keepthe same total volume of the mixture, therefore topping it up to 75mlevery time. I will be sight the counterbalanceion of the two chemicals, andmeasure how quickly the sulphur is produced. I will also keep thestart temperature the same.What Will I Try To Find out(a)I am going to find out how long it takes for Sodium Thiosulphate( ) to react wit Hydrochloric Acid (HCL) to produce Sulphur so you canno longer see through it (opaque). To do this I will use paper withwriting on, and wait until I can no longer contain it, because thesolution will turn milky.My PredictionThe stronger the solution, therefore the more Thiosulphate particles,the quicker the reaction because there will be more particles in thesolution to react with the Hydrochloric Acid, with a bigger percentagechance of reacting/hitting it. This is because if there is moreparticles in the total substance of 75ml, there is less surface areafree.double the amount of particles, in the same total volume, means twicethe chance of collision therefore in theory half the time on reaction, due to a high concentration. This is the Collision Theory.This means that my overall prediction is that when the strongestamount of Sodium Thiosulphate is added to the Hydrochloric Acid, it will react faster. This also, proved above means that I will not needto add water, so preventing dilution.Diagram Proving PredictionMethod1. Measure out 25ml of Hydrochloric Acid (Hcl) - keep the same every time.2. Measure out the postulate amount of Sodium Thiosulphate ( ) in a cylinder3. Pour ( ) into a chronicle flask4. Place paper with writing on under flask5. Add Hcl, as soon as it mixes with the ( ), start the stopwatch6. As soon as the solute has finished reacting, and the writing is no