27571 - Analytical Chemistry 2

Learning outcomes

At the end of the course the student has the theoretical bases and the practical ability in the chemical laboratory that allow him to employ the volumetric, potentiometric, conductimetric, voltammetric and electroanalytical analytical techniques in general. The student knows how to tackle elementary analytical problems and how to choose and apply the most suitable technique and the most appropriate method for processing and performing statistical treatment of experimental data

Course contents

Primary and secondary standards. Precipitation indicators. Complexometric indicators.

Volumetric analysis: precipitation, complexation and redox titrations.

Indirect potentiometry: acid-base and precipitation titrations. Direct potentiometry and ion-selective electrodes. Glass electrode and operational pH measurement.

Conductometry and conductometric titrations.

Fundamentals of spectroscopy: Lambert-Beer law with qualitative and quantitative applications.

EXERCISES:

Statistics for analytical chemistry: setup and use of spreadsheets for experimental data processing.

LABORATORY:

To attend the laboratory, it is requested that students have completed the compulsory course on safety at work and they have handed over to the teacher (or sent by e-mail to mara.mirasoli@unibo.it) a copy of the certificate of passing the final exam.

Each student is required to procure and wear the chemical lab coat.

Laboratory experiments:

- Standardization of a strong base with an acid primary standard

- Titration of a polyprotic acid with a strong base: identification of the end points by means of two chemical indicators or by potentiometry.

- Titration of bleach with thiosulphate (indirect iodometry) with starch indicator.

- Titration of ascorbic acid with iodine, with starch indicator (direct iodometry).

- Back titration of ascorbic acid with excess of iodine in the presence of iodate, with starch indicator.

- Complexometric titration for the determination of water hardness, with determination of the calcic and magnesium components.

- Titration of chloride ions with silver nitrate, Fajans method.

- Titration of Volhard.

Readings/Bibliography

Material: the material presented in class is made available to the student in electronic format.

The course material and notes taken in class are essential for the exam, as well as one of the following texts:

- Fondamenti di Chimica Analitica Quantitativa", Daniel C. Harris (Zanichelli Editore, Bologna, 2017).

- "Fondamenti di Chimica Analitica di Skoog e West”, F. J. Holler, S. R. Crouch (Edizione: III, EdiSES, S.r.l., Napoli, 2015).

- “Chimica Analitica e Analisi Quantitativa”, D.S. Hage, J.D. Carr, (Piccin Nuova Libraria SpA, Padova, 2012).

- "Chimica Analitica Quantitativa", Daniel C. Harris (Zanichelli Editore, Bologna, 2017).

Other university-level analytical chemistry texts can be freely chosen by the student.

The following text, in which the theoretical part is only recalled to great signs, contains numerous exercises with detailed explanation for their execution:

- "Esercizi per la Chimica Analitica, con richiami di teoria", S. Araneo, (Progetto Leonardo, Esculapio, Bologna, edizione 2012 e edizione 2018).

Teaching methods

Lessons in which the course topics are presented and discussed, with explanatory numerical exercises executed at the blackboard. Practical tests. Laboratory experiments.

Assessment methods

The assessment of learning takes place only through the final exam, which ensures the acquisition of knowledge and skills expected by conducting an oral interview and the resolution of numerical problems of the entire program.

The exam registration is required on Almaesami, in compliance with mandatory deadlines. Students are invited to unsubscribe if they are not interested in taking the examination. Cancellations must be made on Almaesami or, in alternative, by writing an email to the teacher at mara.mirasoli@unibo.it [mailto:mara.mirasoli@unibo.it] .

The evaluation criterion is based on the demonstration by the student to be able to use and apply the knowledge, information and cultural tools provided by the course, with discussion of the laboratory report. The threshold of sufficiency of learning is represented in particular by the demonstration of critical understanding and ability to discuss about the topics of the course, as well as the resolution of numerical problems.

The teacher is available for further clarification, and to verify the level of pre-exam preparation by appointment.

Teaching tools

Video projector, PC, Internet and You Tube links.

Office hours

See the website of Mara Mirasoli

See the website of Martina Zangheri