CHM 1046L Florida International University 2. Which graph Department of Chemistr
ID: 503364 • Letter: C
Question
CHM 1046L Florida International University 2. Which graph Department of Chemistry and Biochemistry Therefore, (zero, first, or second order) produced the data that fit best to the linear trendline? what is the order of this reaction? 3. Once the order of the reaction has been determined, use the graph to determine the rate constant (k). Be sure to show all calculations and provide correct units based on the order of the reaction. 4. Once the rate constant has been determined, use it to calculate the hal life of Ba. Be sure to show all calculations. on the theoretical t of Ba (2.55 min) and the a. Calculate a percent error based 1/2 experimental value obtained.Explanation / Answer
2. The graph which best describes the decay of 137mBa is Ln Net Count versus time, thus the reaction follows first order kinetics.
3. equation of line : y = -0.1409x + 7.6467
equation for first order reaction : Ln[R]t = -kt + ln[R]o
compare the 2 equation Slope of the line = -0.1409 = -k
thus rate constant = k = 0.1409 min-1
4. half-life of the first order reaction is given by following equation
t1/2 = 0.693/k = 0.693/0.1409 = 4.92 min
% error = difference between the values * 100 / actual value = ( 4.92 - 2.55) *100/ 2.55 = 92.94% error
The percentage error is very high, as determined rate constant from graph is very small. Kindly check the calculation for plotting graph or else repeat the experiment.
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