Publication in the Diário da República: Despacho n.º 8955/2023 - 31/08/2023
6 ECTS; 1º Ano, 2º Semestre, 30,0 T + 30,0 PL + 3,0 OT , Cód. 938089.
Lecturer
- Manuel Alberto Nogueira Henriques Rosa (1)(2)
(1) Lead Professor
(2) Teaching Professor
Prerequisites
Not applicable.
Objectives
To understand the fundamental principles and mechanisms of acidbase, redox, and coordination equilibria, and to recognize how these equilibria manifest in cultural heritage materials and in conservationrestoration processes.
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 laboratory practical work report (P), all graded on a scale of 0 to 20. The final mark is obtained from the average of the five assessment elements and must be equal to or higher than 10/20 for approval.
Final mark (continuous assessment) = (T1+T2 +T3+T4+P) / 5
Attendance at the laboratory practical class is compulsory, as is the group preparation of the report on the practical work carried out.
During the Examination, Resit Examination, Student Worker and Special assessment periods, students will be assessed by means of a theoretical test (T), graded on a scale of 0 to 20, with the final mark resulting from the following weighting together with the mark obtained in the practical work report (P):
Final examination mark = (T×0.8)+(P×0.2)
Students who obtain a final examination mark equal to or higher than 10/20 shall pass the course unit.
Bibliography
- Raymond, C. (2021). Chemistry. New York: McGraw Hill
Teaching Method
Lectures, tutorials and laboratory sessions.
Software used in class
Not applicable.
