Module Details

The information contained in this module specification was correct at the time of publication but may be subject to change, either during the session because of unforeseen circumstances, or following review of the module at the end of the session. Queries about the module should be directed to the member of staff with responsibility for the module.
Title CHEM246 - Measurements in Chemistry
Code CHEM246
Coordinator Dr G Sedghi
Chemistry
G.Sedghi@liverpool.ac.uk
Year CATS Level Semester CATS Value
Session 2021-22 Level 5 FHEQ Whole Session 15

Pre-requisites before taking this module (or general academic requirements):

 

Aims

The aim of this module is to instruct students in the practice of taking physical measurements, the critical analysis and evaluation of experimental data, the application of measurements to the study of chemical phenomena and the dissemination of results.


Learning Outcomes

(LO1) By the end of the module, students should be able to
1. Take physical measurements of varying complexity using a wide range of experimental techniques;
2. Assess the risks involved in chemical lab work and handle chemical materials in a safe manner;
3. Choose appropriate methods for the analysis of data;
4. Analyse experimental data using graphs, spreadsheets and linear regression;
5. Assess the accuracy and significance of experimental results;
6. Apply the results of physical measurement to the interpretation of chemical phenomena;
7. Combine units and perform a dimensional analysis;
8. Have experience of the application of spectroscopic techniques (UV, IR, NMR and mass spectrometry) in the characterization of organometallic and inorganic compounds;
9. Organise and plan their time effectively.


Teaching and Learning Strategies

This is an on-line version of a laboratory-based module in which students practise a range of measurement techniques appropriate for the investigation of a wide range of chemical phenomena spanning thermodynamics, kinetics, spectroscopy, electrochemistry, surface science and transition metal chemistry. Students perform experiments with minimum supervision (although staff and postgraduate demonstrators are at hand to answer questions and provide guidance if necessary) and are responsible for planning and timetabling their experiments themselves. Students are expected to complete a minimum number of experiments, although more experiments may be undertaken. Each experiment must be analysed using appropriate techniques and written up in a laboratory report which is presented to a demonstrator for marking before the next experiment is allocated. Marks are allocated for the quality of the data, the quality of the write-up and the understanding displayed.


Syllabus

 

The experiments comprise a series of experiments from Physical Chemistry and Inorganic Chemistry:
• Kinetics of the acid-catalysed hydrolysis of ethyl ethanoate
• Critical micelle concentration
• Boiling point - composition diagram
• The dipole moment of dibenzoyl
• Iodine absorption spectrum
• Redox potential of the iron system
• The dissociation of ethanoic acid by conductance
• Potentiometirc titration
• Reaction isotherm
• Fluorescence of Rhodamine B and its quenching by iodide ions
• Gas-liquid chromatography
• The enthalpy of neutralisation
• Bomb calorimetry
• The association of uranyl and thiocynanate ions
• The reaction of crystal violet with hydroxide ions
• Thermodynamics of ethanoic acid dimerisation
• T he characterisation of reaction intermediates by NMR Spectroscopy
• Job's method
• Preparation & thermochromic transition of diethylammonium tetrachlorocuprate(II)
• Conductivity of transition metal complexes
• Magnetic susceptibility of nickel complexes
• UV-vis spectra of transition metal ions

The first workshop is designed to teach generic skills needed for the analysis of experimental results (Data and error analysis).

It is followed by a series of spectroscopic workshops. Each workshop will begin with a short lecture to introduce the topics covered. Students will be introduced to spin 1/2 NMR active nuclei other than 1H and will then work through problem sheets under the guidance of the demonstrators.
The following material will be covered:
• Introduction to the physical basis of NMR. Quantum numbers, energy levels, magnetic equivalence, chemical shifts, scalar couplings. Revision of CHEM 170 material.
• The use of mass spectra, infrared spectra, elemental analyses and multinuclear NMR spectra in the determination of the structure of inorganic and organometallic complexes.
• Scalar coupling (J values) in NMR and its use in the determination of stereochemistry and conformational analysis


Recommended Texts

Reading lists are managed at readinglists.liverpool.ac.uk. Click here to access the reading lists for this module.

Teaching Schedule

  Lectures Seminars Tutorials Lab Practicals Fieldwork Placement Other TOTAL
Study Hours       80

  52

18

150
Timetable (if known)              
Private Study 0
TOTAL HOURS 150

Assessment

EXAM Duration Timing
(Semester)
% of
final
mark
Resit/resubmission
opportunity
Penalty for late
submission
Notes
             
CONTINUOUS Duration Timing
(Semester)
% of
final
mark
Resit/resubmission
opportunity
Penalty for late
submission
Notes
Workshop exercises. Standard UoL penalties apply for late submission. There is no re-submission opportunity. These assignments are not marked anonymously.      20       
Coursework: Lab Experiments Lab Reports, presented to a demonstrator. The work is marked in student's presence to allow for immediate feedback. Anonymous marking impossible. There is no re-subm      80