Unit ANALYTICAL CHEMISTRY
- Course
- Chemistry
- Study-unit Code
- GP000255
- Curriculum
- In all curricula
- Teacher
- Francesca Nunzi
- Teachers
-
- Francesca Nunzi
- Fabio Marmottini (Codocenza)
- Hours
- 73 ore - Francesca Nunzi
- 24 ore (Codocenza) - Fabio Marmottini
- CFU
- 9
- Course Regulation
- Coorte 2020
- Offered
- 2020/21
- Learning activities
- Caratterizzante
- Area
- Discipline chimiche analitiche e ambientali
- Academic discipline
- CHIM/01
- Type of study-unit
- Obbligatorio (Required)
- Type of learning activities
- Attività formativa monodisciplinare
- Language of instruction
- Italian
- Contents
- The course aims to provide students with the basics of chemical analysis in solution and its use in volumetric quantitative analysis, including through practical individual exercises in laboratory.
In particular, the students who attended the course:
- They know how to report the result of an experimental measure;
- They know the acid-base equilibria, the equilibrium of formation of precipitates and complexes;
- They know how electrodes for potentiometric and conducting measurements work;
- They can calibrate the glassware for volumetric analysis;
- They can determine the unknown concentrations of analytes present in aqueous solution by acid-base, precipitation, complexation and redox reactions;
- They are able to carry on measure with a potentiometer or with a conductivity meter. - Reference texts
- 1. Daniel C. Harris Chimica Analitica Quantitativa 2017 Zanichelli
2. Daniel C. Harris Fondamenti di Chimica Analitica Quantitativa 2017 Zanichelli
3. D.A. Skoog - D.M. West - F. G. Holler - S.R. Crouch - Fondamenti di Chimica Analitica III Edizione EdiSES NAPOLI 2015
4. Valerio Di Marco, Paolo Pastore, G. Giorgio Bombi Chimica analitica. Trattazione algebrica e grafica degli equilibri chimici in soluzione acquosa Edises 2015
5. John R. Taylor Introduzione all’ analisi degli errori Lo studio delle incertezze nelle misure fisiche Zanichelli 2000
6. Silvia Araneo Esercizi della chimica analitica con richiami di teoria Società editrice Esculapio 2014
7. Laboratory Experiments in Analytical Chemistry Maurice O. Iwunze AuthorHouse 2016 - Educational objectives
- Students are expected to acquire knowledge of the fundamental principles of analytical chemistry,
with particular attention devoted to chemical equilibria in solution. - Prerequisites
- In order to be able to understand and apply the techniques considered within the Course, it is necessary that the student has successfully passed the exam of General and Inorganic Chemistry 1 and that he has attended to the lab of the Elements of Inorganic Chemistry and Lab of Inorganic Chemistry course. In particular, it is essential that the student has fully understood the fundamental rules of the stoichiometric calculation and the principles governing the equilibria in acqueous solution and that he knows how to manage eoth the precision and non precision glassware.
- Teaching methods
- The course is organized as follows:
- lectures on the subjects of the course;
- practical analysis in lab aiming at the quantitative determination of some analytes in acqueous solution. Students are generally divided into two or three groups (35 students maximum for each group) and the laboratory exercises will be held in two or three turns, each one of 3 or 4 hours. - Other information
- Teacher's e-mail:
francesca.nunzi_at_unipg.it
(please, replace at with @) - Learning verification modality
- During the semester, students must work autonomously in the laboratory exercises. They are also invited to fill in and deliver to the teacher the lab papers containing the results of the analyzes carried out. Both the methods of carrying out the laboratory exercises and the obtained results contribute to the final evaluation. Examination takes place through a written test (solving of numerical problems) plus an oral interview lasting 30-45 minutes on the course content and on laboratory analysis.
For information on support services for students with disabilities and/or DSA please visit the web page http://www.unipg.it/disabilita-e-dsa. - Extended program
- - Theoretical and practical aspects of an analytical process.
- Fundamental theoretical principles of chemical reactions in solution.
- Steps in a typical qualitative and quantitative chemical analysis.
- Interferences in analytical chemistry and their treatment.
- Studies of the feasibility criteria of an experimental analytical determination.
- General aspects of volumetric direct and indirect analytical processes.
- Study of the factors that govern the solubility of poorly soluble substances.
- Error associated with a measure.
- Precision, accuracy and reliability of an experimental result.
- Preparation of standard solutions.
- Theoretical and experimental titration curves.
- Mathematical equation that describes the titration curve of a generic volumetric analytical process.
- Criteria to determine the equivalence point in the symmetrical and not symmetrical theoretical and experimental titration curves.
- Titrations by precipitation.
- Equation titration curve and its use in analysis for precipitation.
- Titration of halides according to Mohr and Fajans methods.
- Neutralization titrations.
- General concepts on acids and bases (Bronsted- Lowry theory)
- Exact and approximate calculation of the concentration of H+ in aqueous solutions.
- Mathematical equations of titration curves for strong and weak monoprotic and polyprotic acid-base systems.
- Buffering capacity and mathematical equation for the exact and approximate calculation of the - buffering capacity of an aqueous solution versus pH.
- Study of the correlation between buffering capacity versus pH graphs and their titration curves for complex acid-base systems.
- Two-colour and appearing colour acid-base indicators.
- Conductometric and potentiometric methods for the determination of the equivalent point.
- Feasibility study of experimental acid-base titrations of acid or base mono and polyfunctional substances and of commercial products.
- Conductimetry
- Measurement and study of the factors responsible for the conductance of an aqueous solution.
- Conductometric titration curves.
- Criteria to determine the equivalent point in conductometric titration curves.
- Use of conductimetry in acid-base titrations and in titrations for precipitation.
- Complexometric titrations
- Study of the complexation reactions for analytical applications.
- Use of chelating agents in complexometric procedures (in particular EDTA).
- Study of the optimal experimental conditions for the complexometric determination of a generic analyte.
- Metallochromic indicators.
- Direct, indirect, by displacement and selective of several metals complexometric titrations.
- Oxidation-reduction titrations.
- Study of the factors that govern the redox reactions.
- Titration curve and the potential at the equivalent point in redox reactions.
- Stability of the redox couples in aqueous solutions.
- Permanganate titrations, direct and indirect iodometry.