Determination of a Rate Equation Essay -- GCSE Chemistry Coursework In

Determination of a score EquationRate equation has the form send = k AxBy which shows how the rateof a chemical reply depends on the concentration of the reactants(A&B) and the rate constant k. The rate equation normally indicateswhat species are involved in the rate-determining step and how manyspecies are involved.A rate equation is used to describe how the concentration of a productincreases or the concentration of the reactants decreases with time,the equation also indicates how the concentration of one or morereactants directly affects the rate. now and again it can even be theconcentration of a product that affects the rate. In general the rateequation for the chemical reaction A + B C + DIs found by experiment to follow simple kinetics with the rateequation being written asRate = k AxByk = rate constant, x = revisal with respect to A, y = order withrespect with B.There are three orders of reactions, zero order, first order andsecond order.Zero order = the rate does non depend upon the concentration of thereactant. The rate of reaction is fixed. Doubling or tripling theconcentration of the reactant makes no difference to the rate. ThusRate of reaction = k or rate of reaction = kA0.First order = the rate of reaction depends directly upon theconcentration of the reactant. If the concentration of the reactant isdoubled, the rate doubles, thusRate of reaction = kA or rate of reaction = kA1Second order = the rate of reaction depends directly upon the squareof the concentration of the reactants. If its concentration isdoubled, its rate of reaction quadruples. ThusRate of reaction = kA2 The graph below shows zero, first and second order reactions and howchanges in the co... ...ean that the concentration would be altered so this wouldnt work.Also when doing the experiment the temperature was not al instructions constantin the surroundings and in the solution. This could have affected therate of reaction by some reactions happening faster and some dilato rythan the others. To improve this i could make sure all the solutionswere at the same temperature before starting the reaction. This wouldthen fancy that the test was being conducted fairly and that way icould get more accurate results.To improve the experiment and minimise errors I can try and devise abetter method that would ensure that all of the above errors werereduced.When measuring out my solutions I was taking readings from below themeniscus, this reduced the numbers of errors in my results.REFERENCES Cambridge chemistry 2 text book Letts rewrite guide. Class notes.