Sodium Thiosulphate & Acid :: GCSE Chemistry Coursework Investigation

Sodium Thiosulphate & AcidPlanningTo ensure that this experiment is safe, I have taken roughly precautions.I wore goggles at all times, made sure not to spill any chemicals suchas the acid onto skin or clothes, and to be aware of glass.I have used various different apparatus, including two measuringcylinders, one 25ml, and the other 50ml. I used a 150ml chronicleflaskful and a stopwatch. Here is a few diagrams of these apparatus.What I get out Vary, Not Change To Keep A Fair Test & What I Will hold & MeasureI will vary the amount of Sodium Thiosulphate (10-50ml), but keepingthe akin amount of Hydrochloric Acid (25ml) to make it a fair test. in like manner when I vary the amount of Sodium Thiosulphate, I will always keepthe same total volume of the mixture, in that respectfore topping it up to 75ml every(prenominal) time. I will be observing the reaction of the two chemicals, andmeasure how quickly the sulphur is bring ond. I will also keep thestart temperature the same.What Will I Try To Find OutI 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 melodic theme with penning on, and wait until I can no longer read 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.Twice the amount of particles, in the same total volume, means twicethe chance of collision therefore in surmisal 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 Ac id, itwill react faster. This also, proved in a higher place 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 needed 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