QUESTION 1-DATA ANALYSIS a. Obtain a table expressing concentrations in mg/L and micromole/L ( b. Obtain a table with the average intensity of current for each of the solutions analysed in the experiment. Obtain the standard deviation and the relative standard deviation (%RSD) for each of the measurements. Comment on the results. c. Produce a calibration curve, plotting average current intensities vs paracetamol concentration in mg/L. Obtain the correlation coefficient and the best line fit making sure you show the uncertainty (standard deviation) for each of the measurements in the form of error bars. Comment on the results. d. Experiment 2. Calculate the average intensity of current. Obtain the standard deviation and the %RSD of the determination for experiment 2. e. Draw a plot for the different intensity of current vs potential plots with the data from experiment 3. Comment on the results. ( f. Draw a plot for the scan rate vs peak current of experiment 3. Use the literature to comment on this. g. Fill in Table 1 by entering values of parameters collected from your experiments (noted as 'exp') and calculate relevant parameters (noted as 'calc') Table 1. Data collected from experiments Ccalib sol ν (mg/L) (V/s) e; 'exp' 'exp' 'exp' Epa(V) Epc(V) 'exp' ΔΕΡ (V) 'exp' 'calc' ipa ipc E (V) (HA) 'calc' (HA) 'exp' 'exp' ipǝ/ipc 'calc' h. Determine reversibility of the redox of paracetamol and fully justify your answer. i. An electrode has a potential of -0.535 V with respect to a calomel electrode. What is the potential with respect to silver-silver chloride electrode? (Ecalomel = +0.241 V, Esilver-silver chloride +0.197 V)
QUESTION 1-DATA ANALYSIS a. Obtain a table expressing concentrations in mg/L and micromole/L ( b. Obtain a table with the average intensity of current for each of the solutions analysed in the experiment. Obtain the standard deviation and the relative standard deviation (%RSD) for each of the measurements. Comment on the results. c. Produce a calibration curve, plotting average current intensities vs paracetamol concentration in mg/L. Obtain the correlation coefficient and the best line fit making sure you show the uncertainty (standard deviation) for each of the measurements in the form of error bars. Comment on the results. d. Experiment 2. Calculate the average intensity of current. Obtain the standard deviation and the %RSD of the determination for experiment 2. e. Draw a plot for the different intensity of current vs potential plots with the data from experiment 3. Comment on the results. ( f. Draw a plot for the scan rate vs peak current of experiment 3. Use the literature to comment on this. g. Fill in Table 1 by entering values of parameters collected from your experiments (noted as 'exp') and calculate relevant parameters (noted as 'calc') Table 1. Data collected from experiments Ccalib sol ν (mg/L) (V/s) e; 'exp' 'exp' 'exp' Epa(V) Epc(V) 'exp' ΔΕΡ (V) 'exp' 'calc' ipa ipc E (V) (HA) 'calc' (HA) 'exp' 'exp' ipǝ/ipc 'calc' h. Determine reversibility of the redox of paracetamol and fully justify your answer. i. An electrode has a potential of -0.535 V with respect to a calomel electrode. What is the potential with respect to silver-silver chloride electrode? (Ecalomel = +0.241 V, Esilver-silver chloride +0.197 V)
Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
ChapterA1: Evaluation Of Analytical Data
Section: Chapter Questions
Problem A1.23QAP
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Transcribed Image Text:QUESTION 1-DATA ANALYSIS
a. Obtain a table expressing concentrations in mg/L and micromole/L (
b. Obtain a table with the average intensity of current for each of the solutions analysed in the
experiment. Obtain the standard deviation and the relative standard deviation (%RSD) for
each of the measurements. Comment on the results.
c. Produce a calibration curve, plotting average current intensities vs paracetamol
concentration in mg/L. Obtain the correlation coefficient and the best line fit making sure you
show the uncertainty (standard deviation) for each of the measurements in the form of error
bars. Comment on the results.
d. Experiment 2. Calculate the average intensity of current. Obtain the standard deviation and
the %RSD of the determination for experiment 2.
e. Draw a plot for the different intensity of current vs potential plots with the data from
experiment 3. Comment on the results. (
f. Draw a plot for the scan rate vs peak current of experiment 3. Use the literature to comment
on this.
g. Fill in Table 1 by entering values of parameters collected from your experiments (noted as
'exp') and calculate relevant parameters (noted as 'calc')
Table 1. Data collected from experiments
Ccalib
sol
ν
(mg/L) (V/s)
e;
'exp' 'exp'
'exp'
Epa(V) Epc(V)
'exp'
ΔΕΡ
(V)
'exp' 'calc'
ipa
ipc
E (V) (HA)
'calc'
(HA)
'exp'
'exp'
ipǝ/ipc
'calc'
h. Determine reversibility of the redox of paracetamol and fully justify your answer.
i. An electrode has a potential of -0.535 V with respect to a calomel electrode. What is the
potential with respect to silver-silver chloride electrode? (Ecalomel = +0.241 V, Esilver-silver
chloride +0.197 V)
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