The Effect Of Concentration On The Rate Of Reaction Coursework

The Effect Of Concentration On The Rate Of Reaction Coursework-13
Aim To investigate how a change in temperature effects the rate of a chemical reaction.

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The first solution then, will compromise 10cm3 of 40g/dm3 sodium thiosulphate, which in a conical flask, and then 100cm3 of water will be added to complete the solution.

10cm3 of dilute hydrochloric acid will be poured into a separate measuring cylinder.2. The acid is poured into the flask which has the sodium thiosulphate solution in it.3.

These steps are to be repeated but the concentration of sodium thiosulphate will be varied.

This will be done by mixing different volumes of the original sodium thiosulphate solution with water.5.

The Effect of Temperature on the Rate of Reaction Plan We must produce a piece of coursework investigating the rates of reaction, and the effect different changes have on them.

The rate of reaction is the rate of loss of a reactant or the rate of formation of a product during a chemical reaction.When the temperature is increased the particles will have more energy and thus move faster.Therefore they will collide more often and with more energy.The graph shown below is taken from my preliminary experiment's results and supports this argument.Volume ofdilute HCl(cm3) Volume of 40g/dm3Sodium Thiosulphate Volume of Water(cm3) Time taken for Crossto disappear(sec)5 50 0 315 40 10 395 30 20 525 20 30 555 10 40 89List all the apparatus that you now plan to use (diagrams should be included) (P4b).As the hydrochloric acid mixes with the sodium thiosulphate and the water in the flask, the stopwatch is started.The flask is viewed from the top and then as the cross disappears the stopwatch is stopped and the time recorded.4.This means that the graph drawn up in my analysis will have a negative correlation, because as one variable increases the other one decreases.In this case as concentration increases the time taken for the reaction to occur will decrease.Particles with more energy are more likely to overcome the activation energy barrier to reaction and thus react successfully.If solutions of reacting particles are made more concentrated there are more particles per unit volume.

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