Document Quality :: GCSE Chemistry Coursework Investigation

Document Quality meter the rate of answer, when dilute sodium thiosulphatesolution and dilute hydrochloric acid ar mixed.HypothesisI predict that the higher the engrossment of sodium thiosulphate,the express the rate of reaction.AimIn this experiment I intend to run the collision possible action. My aim is tosee if the concentration of sodium thiosulphate leave behind push the rateof reaction.IntroductionIn this experiment I will sidetrack the concentration of sodiumthiosulphate to measure the rates of reaction. I will be mixingdifferent concentrations of sodium thiosulphate with hydrochloricacid, the collision theory says the reaction cartridge holder will alter this iswhat I will be testing.The collision theory tells us that the larger the surface atomic number 18a, thefaster the reaction. So the higher the concentration the more(prenominal)(prenominal) atomsthither atomic number 18 to react. There are 4 things that take up the rate ofreaction, concentration, surface area, catalysts and temperature.Concentration gage affect the rate of reaction by increasing atoms tocollide with each other. The more atoms there are to collide, thefaster the rate of reaction.In reactions where gases are involved, if you profit the jamthe particles will move closer together. The smaller the space in thecontainer, collisions are more likely to occur. If the concentrationis weaker, this means there are fewer atoms to collide. If an objectivehas a large surface area, the reaction rate will increase as there ismore surface area for the atoms to collide. I guesswork that the moresurface area there is the more space there is for the particles toreact.Catalysts heighten the rate of chemical substance reactions but are not employ up inthe reaction.Examples of catalysts are enzymes, clay, and hydrogen peroxide. Theseall speed up certain chemical reactions. Enzymes are found in thehuman body, they are there to break level food and make digestion timeshorter. Enzymes can also be found in washing powder, to break downfood stains on clothes. Temperature can affect the rate of reaction toa great extent because particles vibrate more at higher temperatures.The more they vibrate the more chance there is that they will collidewith some other particle, thus causing the rate of reaction to increase.In a chemical reaction, the reactants collide with each other.PressureThis diagram shows us that the more pressure there is the more likelyit is that the particles will collide.High pressure secondary pressureMore collisions as the particles are closer together non many collisionsMarble in dilute hydrochloric acidThis diagram shows us that surface area does have an effect on therate of reaction.1 Large marble cube Marblecube split into 6 piecesIn the experiment I carry out, I will change the concentration and see