Consider a reaction where the reactants are colorless, and the product is yellow
ID: 512754 • Letter: C
Question
Consider a reaction where the reactants are colorless, and the product is yellow. A + B rightarrow C colorless yellow The progress of the reaction can be followed by recording the increase in absorbance due to the product over time. At first, the absorbance increases linearly with time as the reaction starts, and then starts to curve, and eventually levels out as the reaction completes. A sample plot is shown here. To find the initial rate of the reaction, a best-fit line can be drawn through the data points that are linear. Choose the times for the data points which comprise the linear portion of the graph. 30 s 60 s 90 s 120 s 150 s 180 s 210 s 240 s 270 sExplanation / Answer
Data points between 30s-180 s (30, 60, 90, 120,150,180) are good for making best fit curve for finding the initial rate. The curvature starts from 210s onwards.