65816 - Stoichiometry And Chemical Processes

Learning outcomes

At the end of the course the student will possess the knowledge and the theoretical basis necessary for the understanding of the quantitative aspects of the chemical reactions. The student will be able to describe the equilibria involved in chemical transformations through the use of stoichiometric equations and to evaluate the spontaneity of acid-base, redox and precipitation reactions, as well as to understand the meaning of the experimental results in various quantitative analysis, especially those based on volumetric titrations.

Course contents

• Definitions of solutes concentration in homogeneous (molarity, molality, normality and molar fraction) and heterogeneous mixtures (percentage by weight and by volume).
• Preparation of solutions with known titre
• Acid-base titration for the quantitative analysis
• pH control and selection of buffer systems in the application range
• Quantitative foods analyses based on titrations and acid-base back -titrations
• Kjeldahl method and conversion index for proteins
• Redox species and reduction potential, spontaneity of redox reactions
• Redox Titrations
• Simultaneous equilibria in solution and speciation of acid polyprotic at controlled pH
• Solubility constant and effect of the common-ion, controlled precipitation.
• Applications of spectrophotometry in the study of chemical reactivity: calibration curves and fitting of the experimental data
• Isosbestic point and quantitative determination of ionizable species.
• Raoult law and colligative properties: drop in vapour pressure, boiling point elevation, freezing point depression, osmotic pressure. Vapour pressure of liquid mixtures homogeneous
• Meaning of the Arrhenius equation. Quantitative aspects of chemical kinetics
• Order of reaction and reaction mechanisms
• Computer-aided stoichiometric problem solving 

Readings/Bibliography

• Title: Stechiometria. Un avvio allo studio della chimica
Authors: Bertini Ivano, Luchinat Claudio, Fabrizio Mani, Enrico Ravera
Publisher: Casa Editrice Ambrosiana (CEA)
Sesta Edizione
Pages: 371
EAN: 978-88-08-82023-5

• Title: Stechiometria. Dal testo di M. Freni e A. Sacco
Authors: Alessandro Caselli, Francesca Tessore, Silvia Rizzato
Publisher: Edises
Sesta Edizione
Pages: 480
EAN: 978-88-36-23031-0

Teaching methods

The teaching consists of 6 ECTS. Each ECTS includes 6 hours of lectures and 4 hours of practical work in class. The practical work is carried out in the didactic room at the Campus of Cesena (Villa Almerici) with a PC workstations equipped with a projector and with access to the network. The objective of the practical exercises is twofold:

• Have the student familiar with the calculation tools
• To develop the student's ability to independently develop logic processes needed to translate the chemical problem in a number of useful mathematical operations.

Assessment methods

The examination at the end of the course aims to assess the achievement of learning objectives that consist of the student's ability to:

• Translate a chemical problem in setting stoichiometric calculations
• Evaluate the chemical meanings of the numerical results
• Develop critical skills in assessing quantities and errors of measurement
• Addressing, from the quantitative point of view, the aspects of the transformation of matter qualitatively encountered during the general chemistry course

The exam consists of a written test based on 6-7 exercises of progressive difficulty to assess the partial or complete maturity of the preparation.

Teaching tools

The didactic material presented in class (spreadsheets and text documents) will be made available to the student in electronic format.
To get educational materials visit the website: http://www.francescocapozzi.it
Audio recordings of the lectures will be permitted, provided that they are made ​​available to all students through the sharing of mp3 files into restricted areas of the above teacher's website.
Username and password are reserved for students enrolled in the course and will be reported by the teacher, at the beginning of the course, directly in class. Otherwise, they will be communicated by subscribing to the corresponding mail distribution list.
Guided access to specialistic web portals is offered where students find constants, variables and characteristics of the substances in order to perform quantitative calculations related to the transformation of matter.

Office hours

See the website of Francesco Capozzi