How the concentration of an acid affects the rate of reaction on marble chips :: GCSE Chemistry Coursework Investigation

How the concentration of an acid affects the pose of answer on marble chipsBackgroundThese different speeds of chemical reaction ar referred to as their rates. Therate of reaction depends on how often and how nasty the reactingparticles collide with distributively other. Particles have to collide in orderto react, and the have to collide hard enough as well. This is calledthe collision theory.When the temperature is increased the particles all move quicker. Ifthey are moving quicker then they are going to have more than collisions.Reactions only happen if the particles collide with enough energy. Ata higher(prenominal) temperature there will be more particles colliding withenough energy to make for the reaction happen. This initial energy isknown as the activation energy, and it is infallible to break the initialbonds. If one of the reactants is a solid then good luck it up intosmaller pieces will increase its surface area. This means theparticles or so it in the solution will have more area to course on sothere will be more effective collisions. A catalyst works by giving thereacting particles something to stick to where they toilet bump into eachother. This obviously increases the number of collisions too. If thesolution is made more concentrated it means that there are moreparticles of reactant knocking some between the water molecules,which makes collisions between the important particles more likely.Chemists overseeing large reactions in industrial situations mustcarefully consider the rates of reactions. For some reactions, much(prenominal) asthe production of a final material, fast reactions will be desirableto increase production and therefore sales profit. For otherreactions, such as the degradation of a material, reducing the ratemay be beneficial to increase the lifetime of a product.Times Education serial Chemistry GCSEPlanI will investigate how the concentration affects the rate of reactionbetween hydrochloric acid and calcium car bonate (marble chips). Therate of reaction can be measured by measuring the amount of splashproduced after a certain amount of time.The reaction will crap place in the cone-shaped flask from where the gasproduced will pop off into the up-turned measuring cylinder. The gaswill then displace the water in the tube. I will measure out exactly50ml of 1molar hydrochloric acid into the conical flask. I will thenweigh out exactly or as close as possible to 2 grams of small coatmarble chips. I will put the chips into the flask with the acid and right off place the bung over it so as to lose as little gas aspossible. I will then keep readings at intervals of fifteen seconds.