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 run of answer on stain chipsBackgroundThese different speeds of reaction are referred to as their rates. Therate of reaction depends on how often and how hard the reactingparticles collide with each other. Particles cast to collide in orderto react, and the have to collide hard teeming as well. This is calledthe collision theory.When the temperature is increased the particles all move quicker. Ifthey are paltry quicker then they are going to have more collisions.Reactions yet happen if the particles collide with enough energy. Ata higher temperature thither will be more particles colliding withenough energy to make the reaction happen. This initial energy isknown as the activation energy, and it is needed to fragment the initialbonds. If one of the reactants is a solid then breaking it up intosmaller pieces will increase its surface area. This means theparticles around it in the solution will have more area to work on sothere will be more useful collisions. A catalyst works by giving thereacting particles something to stick to where they dissolve unwrap into eachother. This obviously increases the number of collisions too. If thesolution is made more knockout it means that there are moreparticles of reactant knocking about amid 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, such asthe production of a final material, fast reactions will be desiredto increase production and therefore sales profit. For otherreactions, such as the degradation of a material, reducing the ratemay be respectable to increase the lifetime of a product.Times Education Series chemistry GCSEPlanI will investigate how the concentration affects the rate of reactionbetween hydrochloric acid and calcium carbonate (marble chips). Therate of reaction can be measured by mensuration the amount of gasproduced subsequently a certain amount of time.The reaction will take fall out in the conical flask from where the gasproduced will travel into the up-turned measuring cylinder. The gaswill then dis tush 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 sizedmarble chips. I will put the chips into the flask with the acid andimmediately place the bung over it so as to lose as unretentive gas aspossible. I will then take readings at intervals of fifteen seconds.