27718 - Laboratory of Analytical Chemistry L (M-Z)

Learning outcomes

At the end of the Course the student is able: to recognize the laboratory equipment and to describe its use.;  to draw hypotheses from experimental results;  to explain the used procedures  on the basis of the involved chemical equilibria; to apply the classical volumetric analyses  (acidimetry, redoximetry, complexometry, and argentimetry) to the quantitative determination of chemical species;  to use  simple instrumental techniques (potentiometry) for the quantitative determination of chemical species; to devise simple  methodologies suitable to solve simple analytical problems; to compile the laboratory notebook; to elaborate the experimental data using basic statistical procedures (significance tests, linear regression), to report experimental data with tables and diagrams; to correctly report the analytical results; to elaborate synthetic reports of own laboratory activity; to give objective evaluation of own work results (using statistical tests).

Course contents

Frontal lessons

Tracking laboratory activity. Practical features of gravimetry. The volumetric glassware: characteristics, use, calibration. Practical features of volumetric titrations: determination of endpoint by means of indicators or graphical and numerical methods. Primary standards. Error treatment. Introduction to potentiometry

Lab activity*

Effect of pH and complexation on solubility. Gravimetric determination of Ni. Calibration of volumetric glassware. Solubility equilibria of amphoteric metals. Acid-base titrations: standardisation of HCl and NaOH solutions; determination of the titer of a tetraoxalate solution; determination of the titer of unknown solutions. Redox titrations: comparison of two different methods for the determination of the titer of a tetraoxalate solution; determination of the titer of unknown solutions. Complexometric titration. Potentiometric titrations (Acid-base, argentimetry).

Numerical exercises

Statistical treatment of the experimental data obtained by the students in their experiences will be conducted.

*The students have to compile their own laboratory notebook, recording their activity and results. The laboratory notebook will be used for course evaluation and credit

Readings/Bibliography

D.A. Skoog, D.M. West, F.J. Holler,  S.R. Crouch, Fondamenti di Chimica  Analitica.  EdiSES, Napoli, 2005.

D.C. Harris, Chimica Analitica Quantitativa, Zanichelli, Bologna, 2005

G. Saini, E. Mentasti, Fondamenti di Chimica Analitica, UTET, Torino 1992.

J.C.Miller and J.N.Miller, Statistics for Analytical Chemistry, Ellis Horwood Ltd., Chichester, 1988.

 

 

Teaching methods

Lectures integrated by exercises related to the discussed topics. It is encouraged individual study on text books and team-discussion on the arguments under study. Theory and laboratory work must co-exist since practice not only develops the capability of the student to think but also to act independently.

Assessment methods

Assessment of the course will be via a written exam, with questions, problem-solving exercises, numerical exercises. It will be followed by an oral exam on the syllabus, integrated with “ Analytical Chemistry ” course (only one final mark will be given for both courses)

Teaching tools

Laboratories, software for data treatment, experiences booklet.

Office hours

See the website of Domenica Tonelli