Rates Of Reaction :: essays research papers

Rates of ReactionBACKGROUND INFORMATIONWhat affects the rate of reaction? 1) The surface area of the atomic number 12. 2)The temperature of the reaction. 3) Concentration of the hydrochloric acid. 4)Presence of a catalyst.In the sample we use hydrochloric acid which reacts with the magnesium toform magnesium chloride. The hydrogen ions carry hydrochloric acid its acidicproperties, so that all solutions of hydrogen chloride and water hold in a sourtaste corrode active metals, forming metal chlorides and hydrogen turn litmusred neutralise alkalis and react with salts of weak acids, forming chloridesand the weak acids.Magnesium, symbol Mg, silver white metallic element that is relativelyunreactive. In group 2 (or IIa) of the periodic table, magnesium is one of thealkaline earth metals. The atomic number of magnesium is 12.Magnesium(s) + Hydrochloric acid(aq) = Magnesium Chloride(aq) + Hydrogen(g)Mg + 2HCl= MgCl2+ H2In the reaction when the magnesium hits the acid when dropped in, it fisses andthen disappears giving of hydrogen as it fisses and it leaves behind a solutionof hydrogen chloride.The activation energy of a particle is increased with heat. The particleswhich have to have the activation energy are those particles which are moving,in the case of magnesium and hydrochloric acid, it is the hydrochloric acidparticles which have to have the activation energy because they are the onesthat are moving and bombarding the magnesium particles to produce magnesiumchloride.The rate at which all reactions happen are different. An utilization of a fastreaction is an explosion, and an example of a slow reaction is rusting. In anyreaction, reactants chemical reactions products.We can measure reactions in two slipway1) Continuous- Start the experiment and watch it happen you can use acomputer logging system to monitor it. I.e. Watching a burnish fade orincrease.2) Discontinuous- Do the experiments and take readings/ samples from theexperiment at different times, th en analyse the readings/samples to see how manyreactants and products are used up/ produced.Reaction rate = amount of reactant used uptime takenIf the amount used up is the same to each one time then the wholly thing that changes isthe time taken.so, reaction rate 1time taken.rate = Ktime taken.Where K is the constant for the reaction.For particles to react-a) They have to collide with each other. b) They need a certain amount ofenergy to break down the bonds of the particles and form new ones. This energyis called the Activation Energy or Ea.When we increase the temperature we give the particles more energy which1) Makes them move faster which In turn makes them collide with each other more