|SCIENTIFIC DISCIPLINARY SECTOR||CHIM/01|
You can take the exam for this unit if you passed the following exam(s):
|MODULES||This unit is a module of:|
The Analytical Chemistry Course deals with the various stages of an analytical process from the choice of the method of analysis to the elaboration of the results with particular regard to the evaluation of their reliability.
Analytical Chemistry develops and applies methods, tools and strategies to obtain information on the composition and nature of matter in space and time. It deepens the study of chemical equilibria for the calculation of the chemical species concentrations. They study the basics of statistics and their application to analytical chemistry.
The course provides the basics of analytical chemistry, including analytical methods, the choice of the method of analysis and its accuracy, sampling, sources of error, the importance of a proper calibration and the use of standard. The tools will be also provided for the interpretation of analytical data with the aid of statistical methods, in order to assess the reliability of data obtained from a series of analyzes.
The course is organized in lectures, supported by power point presentations and other training material available on www.aulaweb.unige.it/.
Both the lectures that the exams can be carried out remotely via computer.
A. Methodology of analytical chemistry
Definition and purposes of analytical chemistry. Good laboratory practices. The main steps of the analytical process. Quantity and unit of measure. Description of the system.
Activity and concentration, ionic strength, and activity coefficients, Debye Hukel equation.
Chemical equilibrium, law of mass action, the equilibrium constants, calculation of the equilibrium constants, complete reactions, the reaction conditions, the solvent.
B. Statistical Bases
Random experiments, population sample. Absolute and relative frequency, random variables.
Statistical regularity, frequency distribution, probability distribution.
The central limit theorem.
Continuous variables. Frequency histogram, probability distribution for continuous variables. Location, dispersion and sample dispersion.
Standard normal distribution.
Distribution of media, Student distribution, distribution of Fisher.
The significance test.
Test on average of a single sample of N repetitions.
Test between the means of two different samples, N1 and N2.
Test on paired data. Test Dixon.
The calibration of an instrument-univariate regression.
Systematic and random errors. Accuracy and Precision.
LOD and LOQ.
C. Chemical reactions.
Acid-base reactions Brönsted. Solvents: properties and classification. The solvent water, protolisi reactions in water.
generic setting for balance: basic state, reactions and equations, mass and charge conditions.
Calculation of the equilibrium concentrations
monoprotic weak acid dissolved in water, neutralization curve with strong base
monoprotic strong acid dissolved in water, neutralization curve with strong base.
monophasic strong base dissolved in water, neutralization curve with strong acid.
monophasic weak base dissolved in water, neutralization curve with strong acid.
weak acid and strong base dissolved in water
weak acid and weak base dissolved in water
The buffer solutions: buffer capacity and the 'index of Van Slyke.
Complexation reactions: general, complexes with ligands unidentati, the chelating ligands.
precipitation reactions: general, dissolution, precipitation, concurrent reactions. Calculation of the equilibrium concentrations.
M. Forina, "Introduzione alla Chimica Analitica", ECIG, Genova, 2003, ISBN: 88-7545-986-X.
D.A. Skoog, D.M. West, F.J. Holler, S.R. Crouch "Fondamenti di Chimica Analitica", EDISES, Napoli, 2005, ISBN: 8879593005
D. S. Hage, J. D. Carr, “Chimica Analitica e Analisi Quantitativa”, PICCIN, Padova, 2012, ISBN 978-88-299-2118-8.
Office hours: Every day, by appointment.
MONICA CASALE (President)
RICCARDO LEARDI (President)
All class schedules are posted on the EasyAcademy portal.
The exam consists of a written test for admission to the oral test. The written test consists of 8 exercises and students have 120 minutes available. After correcting, the papers are discussed with the students involved. The oral test takes place in the presence of two professors, concerns the syllabus taught during the lectures and in general it takes about 30 minutes.
During the course, the students have the opportunity to do an ongoing evaluation that consists in a written entirely equivalent to the written tests scheduled for the appeal sessions. Additional simulations of the oral test are performed.