Rates of Reaction :: GCSE Chemistry Coursework Investigation

The ordain of reply is a measure of how fast something happens. We burn find the measure of chemical answer by measuring the change that happens in a set compass point of time.Introduction------------The rate of reaction is a measure of how fast something happens. Wecan find the rate of reaction by measuring the change that happens ina set period of time. Many factors can fix the rate of reactionthe density of the reactants is one of them. In the followingexperiments we will investigate how the intentness of the reactantsaffect the rate of reaction. To do this we will use the reactionbetween milligram and hydrochloric erosive. GRAPHI will measure the rate of reaction by timing how long the reactiontakes.Aim- I am trying to find out how an increase/decrease in concentrationof the acid affects the rate of reaction in magnesium strips.PredictionI predict that as the concentration of hydrochloric acid increases thetime taken for the magnesium t o dissolve will decrease. I also thinkthat when the concentration of the acid doubles the rate of reactionwill also double.Collision conjectureThe collision theory is how the rate of reaction increases when theconcentration of hydrochloric acid increases.In the reaction firstly all of the particles in the reactingsubstances must clash. They must collide with a certain sum ofenergy called activation energy, this must be legislateed for the reactionto take place. If the particles do not reach this required amount ofenergy there will not be any fortunate collisions and therefore thereaction will not take place. If the particles do reach the requiredamount of energy a reaction will poop out place and as the number ofcollisions increase the reaction speeds up.The more laborious the reactants the larger the number ofsuccessful collisions between the particles. This explains why thelargest rate of reaction is usually as soon as the reactants have beenmixed together, this mean they a re both at their highestconcentrations.High concentration Low concentration(18cm HCL + 2cm HO) (6cm HCL + 14cm HO)The temperature in this investigation will not affect the rate ofreaction because throughout the investigation it will stay at roomtemperature. If the temperature was to change during the experiment itwould effect the rate of reaction by speeding it up if the temperatureincreased because the particles move a lot prompt and travel a larger