Sodium Thiosulphate & Acid :: GCSE Chemistry Coursework Investigation

Sodium Thiosulphate & hotPlanningTo ensure that this experiment is safe, I invite taken some precautions.I wore goggles at only times, made sure not to spill any chemicals suchas the acid onto skin or clothes, and to be aware of glass.I have put ond various different apparatus, including 2 measuringcylinders, one 25ml, and the different 50ml. I used a 150ml annals flask and a stopwatch. here is a few diagrams of these apparatus.What I Will Vary, Not Change To stay A Fair Test & What I WillObserve & esteemI will vary the core of Sodium Thiosulphate (10-50ml), but holdingthe same amount of Hydrochloric Acid (25ml) to make it a fair test. overly when I vary the amount of Sodium Thiosulphate, I will forever and a day followthe same join volume of the mixture, therefore topping it up to 75mlevery time. I will be observing the fight backion 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 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 agelong see through it (opaque). To do this I will use paper withwriting on, and wait until I can no longer read it, because thesolution will turn milky.My PredictionThe stronger the solution, therefore the to a greater extent 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/ striking it. This is because if there is moreparticles in the total substance of 75ml, there is slight surface areafree.Twice the amount of particles, in the same total volume, message twicethe chance of collision therefore in possible action 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 plyed to the H ydrochloric Acid, itwill react faster. This also, turn out 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 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