Tuesday, February 12, 2019

Rate of Reaction Experiment - Sodium Thiosulphate and Hydrochloric Acid :: GCSE Chemistry Coursework Investigation

Rate of Reaction Experiment - atomic number 11 Thiosulphate and Hydrochloric AcidTo investigate the effect, of changing the concentration of a assumeant, in a chemic reaction on it rate.The equation used for the experiment wassodium + Hydrochloric Sulphur + Sulphur + Sodium + waterThiosulphate demigod dioxide chloride Na2S2O3 + 2HCl(aq) S(s) + SO(g) + NaCL(aq) + H2OThe bang Theory can explain reaction rates perfectly. A chemicalreaction can only occur amidst particle when they fritter or shake up at aminimal amount of cleverness need for them to react this is called the activation energy.The rates of a reaction depends on how hard and often the reactingparticles collide. Basically, particles lay down to collide in order to react1) They must also collide hard enough to give a reaction.2) Pressure can also affect reaction rates between gases, an increase in squelch pushes the molecules closer together making them collide more often, which in turn increases the reaction rate.3) A presence of a Catalyst could affect the result, as it is a substance that alters the rate of the reaction. without itself show in the final result. When a solution becomes more concentrated it bureau there are moreparticles of reactant knocking between the water molecules, this sumcollisions between important particles more likely.In a gas, increasing the pressure means the molecules are moresquashed together, there will accordingly be lots more collisions.Higher temperature also increases the energy of the collisions, itmakes particles move faster. Faster collisions can only b caused byincreasing the temperature. enzymeThis is shown in the diagramopposite.The Maxwell-Boltzmann Distribution and activation energyFor a reaction to book place particles have got to collide withenergies greater than or equal to the activation energy for thereaction, this can be marked on Maxwell-Boltzmann Distribution.I have chosen to investigate the effect concentration has on areacti on. I chose this because it is the easier to prepare and willprovide the most accurate set of results.Equipment---------Hydrochloric harsh (5cm3)Sodium thiosulphatePaper with black cross onConical flasks gapeWaterPipetteMeasuring cylinderMethodTo provide plumb accurate results it is important to ensure that thesame printed cross is used for for each one experiment. In this the experimentthe amount of Sodium Thiosulphate is varied each cartridge clip in comparison tothe amount of water used, the solution will incessantly add up to 45cm3.There will always be 5cm3 of hydrochloric acid used. The experimentwas performed at room temperature as this made the experiment on the loose(p) toperform, as no heating or cooling devises were necessary.

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