Rates of Reaction: Sodium Thiosulphate & HCl

[sueanne]

hi i have almost finished my chemistry coursework on rates of reaction based on concentration using sodium thiosulphate and hydrochloric acid. the conc of sodium thiosulphate is my variable. we measure concentration by placing a cross under the reaction mixture and sulphur percipitated makes the cross disappear using time taken for it to disappear.

i have taken two graphs:
one is showing the concentration against time taken
second is showing the rate of reaction (1/time) against concentration

my question is: what does the second graph show that the first graph dosent? apart from the fact that rate of reaction is porportional to concentration. Thanks

 

[GCT]

which one is more important for understanding the rate constant. The order of the reaction?

 

[Blueshift5]

The second graph, showing the rate of reaction (1/time) against concentration, provides a more direct and accurate representation of the relationship between the two variables. By taking the reciprocal of the time, the graph shows the inverse relationship between concentration and reaction rate. This means that as the concentration of sodium thiosulphate increases, the rate of reaction decreases. This information is not as easily apparent in the first graph, which only shows the general trend of the reaction time increasing as the concentration decreases. Additionally, the second graph allows for a more precise determination of the rate of reaction at different concentrations, as it eliminates the potential error of human judgement in determining when the cross has disappeared in the first graph. Overall, the second graph provides a more comprehensive and accurate understanding of the relationship between concentration and reaction rate in this experiment.