What Affects the Rate of Reaction? :: Reaction Rates Energy Science Essays

What Affects the Rate of Reaction?HypothesisTo form a reaction the particles moldiness collide in high speed. Thefaster the particles collide the more(prenominal)(prenominal) kinetic energy is produced. Thisproduces a bigger reaction.There are five key variables that venture the rate of a reaction (inthis case with a solid and a solution)* Change in temperatureAn increase in heat energy within the particles leads to more kineticenergy. Therefore in that respect is more collision of particles and itincreases the rate of the reaction. When we decrease the amount ofheat energy, this will evidently windy down the reaction. For examplewe slow down the process of our food rotting by placing it in a fridgeor a freezer.* Change in concentrationThe concentrations of acids are classed in molars, so 2m would quite astrong concentrated acid, 0.5m would be a very dilute weak acid and 1mwould be in between the two. Also, the more concentrated the acid, themore particles it contains, so there is more of a chance forcollisions.* Change of particle sizeIncreasing the surface area of the particles would lead to morecollision. We do this by making the particles smaller. For instancepeeling a large potato would not take as long as peeling quaternion smallpotatoes this is because the smaller potatoes take aim a larger surfacearea for you to peel.* Pressure (for gases only)Increasing the pressure would bring particles closer together so therewould be more of a chance for collision.* CatalystA catalyst lowers the activation of energy required, consequentlythere being a faster reaction.The deuce-ace variables we are choosing to show which effect the rate ofreaction in our experiments are* Particle size* Concentration* TemperaturePressure was inappropriate to use as a variable, because we were notusing two gases and a catalyst was unsuitable to use for small testslike these. I think that the tests in changing the temperature willhave the fastest times, as the hotter a solution is the more theparticles will move and collide, thus the rate of carbon dioxide beingproduce will be faster. I also think that the large particles testwill take the slowest amount of time because of the lack of surfacearea and the reverse will egest with the test with powered atomic number 20carbonate.PlanWe will be running a various number of experiments to prove whateffects the rate of reaction with calcium carbonate (marble chips) andhydrochloric acid. The balanced equation for these reactants alongwith the productsCalcium carbonate + hydrochloric acid calcium chloride + carbon dioxide + water2 2 3 2