How the change of Hydrochloric Acid concentration affects the rate of reaction with Marble Chips :: GCSE Chemistry Coursework Investigation

How the change of Hydrochloric Acid concentration affects the rate of chemical reaction with Marble ChipsAimTo find if changing the concentration of an stifling will increase ordecrease the rate of the reaction when marble is dissolved inhydrochloric acid. With the equation CaCO3 + 2HCl CaCl2 +H2O + carbonic acid gas.The rate of the reaction affects how quickly the CO2 is produced.Background Knowledge====================The rate of reaction depends on how often and how hard the reactingparticles clash with each 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 particlesall move quicker. If they are moving quicker then they are going tohave much collisions. Higher temperature also increases the energy ofthe collisions, because it makes all the particles move faster.Increasing the temperature only causes faster collisions. Reactionsonly happen if the particles coll ide with enough energy. At a hightemperature there will be more particles colliding with enough energyto make the reaction happen. This initial energy is known as theactivation energy, and it is needed to shock the initial bonds. If oneof the reactants is a solid then breaking it up into smaller pieceswill increase its surface area. This means the particles around it inthe dissolving agent will have more area to work on so there will be moreuseful collisions. If the solution is made more concentrated it meansthat there are more particles of reactant moving about between thewater molecules which makes collisions between the important particlesmore likely. Because of this I expect the reaction rate to be quickerwhen the concentration of the acid is higher. The reaction shouldhowever, end on the same arrive of gas given off. Rate is measured bythe disappearance of reactants and/or the appearance of a product.PredictionWhen the concentration of acid increases the rate of reaction w illincrease. I will be able to sympathise the rate of reaction is increasing asthe gas is produced more quickly.Equipment=========Clamp StandHydrochloric AcidMedium Marble ChipsMeasuring Cylinder (100ml) x 2 (clearly mark each for water or acid)250 ml conical flaskBalanceGas SyringeSafety Equipment i.e. Lab coat, gogglesBoiling TubesStopclock actors line TubeThermometerMethod======* NB before each experiment, ensure that the air temperature is consistent.* Using the measuring cylinder specific for the acid, measure out the specified amount of hydrochloric acid. Then, measure out the specified amount of water in the other measuring cylinder. Pour both of these liquids into a boiling tube.