Publication in the Diário da República: Despacho n.º 10852/2016 - 05/09/2016
4.5 ECTS; 1º Ano, 2º Semestre, 30,0 T + 30,0 TP + 2,0 OT , Cód. 938012.
Lecturer
(1) Docente Responsável
(2) Docente que lecciona
Prerequisites
Not applicable.
Objectives
The students should be able to describe chemical balances (acid-base, coordination and oxide-reduction)and identify these phenomena in artifacts and cultural property.
Program
Chemical equilibrium: General notions of chemical equilibrium; The equilibrium constant; The heterogeneous equilibrium; The quotient of the reaction; Factors affecting balance; Equilibria of solubility; Acid-base equilibria; Equilibria of complexation.
Ionic equilibrium (Acid-base): Bronstead-Lowry acid systems; Autoionization of water; Calculation of the concentrations of the hydrogen ion and the hydroxide ion; Criteria for acidic, basic and neutral solutions; The concept of pH; Solutions of strong acids and bases; PH measurement; Exemplification of pH measurement of solutions with pH meter, and universal indicators.
Complexity Equilibrium: History; General concepts about coordination compounds and complexes; Balance of formation of complexes; Most common complexes in CR practice; Conclusion.
Oxidation-reduction: Oxidation-reduction state; Oxidation-reduction concepts; writing and balancing of redox semi-reactions; writing of a complete redox reaction; Oxidant and reducer; Oxidation and reduction in organic compounds; Reduction potential; Galvanic or voltaic cells; Electrolytic cells; Corrosion of metals; Chemical cleaning by redox mechanisms; Final considerations.
Evaluation Methodology
Continuous assessment consists of four written tests (T1, T2, T3 and T4) and a report of a practical laboratory work (P) classified from 0 to 20 values. The final grade results from the average of the five assessments and must be equal to or greater than 10 values for approval.
Final continuous assessment grade=(T1+T2+T3+T4+P)/5
The presence in the practical laboratory class is mandatory, as well as the group writing of the report of the practical work performed.
In the Exam, Appeal Exam, Worker-Student Exam and Special Exam periods, students will be evaluated in a theoretical test (T) classified from 0 to 20 values, with the final grade resulting from the following weighting with the average grade obtained in the reports of the two practical assignments (P):
Final grade exams=T*0.8+P*0.2
Students approval is obtained when the exam final grade is equal to or greater than 10 values.
Bibliography
- Antunes, J. (2016). Apontamentos de Quimica 2. Tomar: IPT
- Eastop, D. (1998). Chemical Principles of Textile Conservation. Oxford: Butterworth
- Matteini, M. e Moles, A. (1989). La Chimica nel Restauro. Roma: Nardini Ed.
- Wolbers, R. (2000). Cleaning Painted Surfaces: Aqueous methods. London: Archetype Publications
Teaching Method
Lectures, tutorials and laboratory classes.
Software used in class
Not applicable
