Tuesday, March 26, 2019

Investigate how the change in concentration affects the rate of :: GCSE Chemistry Coursework Investigation

Investigate how the change in ducking affects the rate ofreaction between sodium thiosulphate and hydrochloric acid designI am trying to find let on how the change in concentration affects therate of reaction between sodium thiosulphate and hydrochloric acid.I harbinger that the higher the concentration of sodium of thiosulphate,the quicker the rate of reaction go out be between the two substances.The scientific reason for my prediction is payable to the collisiontheory.The collision theory is, that in order for chemicals to react they must come into contact with each other (collide). However, not allcollisions consequent in chemical reactions as sometimes the particlesjust bounce wrap up each other. The particles must have sufficient energywhen they collide to react. If you outgrowth the number of collisions,you increase the rate of reaction. Therefore, a higher concentration heart a greater number of collisions.DiagramPreliminary TestingThis is the record equation for the reaction between the two substancesSodium + Hydrochloric Sodium + due south + Sulphur + WaterThiosulphate Acid Chloride DioxideNa2S2O3 + HCl NaCl + SO2 + S + H2O( aq ) + ( aq ) (aq ) + ( g ) + ( s ) + ( l )Before I start the probe, by having preliminary tests I canfind a volume of each solution that I can use where I am able tocomplete the investigation in a reasonable period of time. When I amundergoing my look into I will be making one variable. By ever-changingthe concentration of sodium thiosulphate, this is done by adding waterto the solution. As I change the amount of water I put into thesolution the concentration of it is changing. The more water that isput into the solution the weaker the concentration will become.To nettle my preliminary results I set up the experiment as in a higher place in thediagram section, and you use different amounts of the solutions.Use a buret to measure the amounts of the solutions needed, and putthem into separate beakers. Using a funnel at the top of the buretteto pout the solution into. After firstly victimisation a measuring cylinder tomeasure the solution.Use a stopwatch to time how long it takes for the cross underneath theconical flask to disappear, as the solutions are mixed together. Asthe reaction turns the two colourless liquids, into a milky colourafterwards.Repeat the procedure with different amounts of the solutions, workingout the best amounts that I could use for experiment.These are the results that I received------------------------------------------------------------------------ core of H2O Amount of sodium Amount of hydrochloric Time Taken

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