LABORATORY FOR CHEMISTRY
Learning outcomes of the course unit
to introduce the first year students to the laboratory experience and to apply the general chemistry teories.
basic concepts of general chemistry
Course contents summary
introduction : laboratory safety, equipments, chemical products.
Chemical reactions: acid-base, redox; recognition of gaseous products. precipitation of few soluble salts; identification of substances on the ground of reactivity tests.
Preparation of compounds (PbCrO4), crystallization and purification of substances (CuSO4).
Solution equilibria : solubility of ionic compounds, solubility product, effect of the common ion, temperature, complexes formation.
Application of homogeneous and heterogeneous equilibria in the separation and recognition of cations and anions.
Principles and applications of volumetric analysis:
1)preparation and dilution of solutions .
2)acide-base titrations(NaOH vs HCl, Na2CO3 vs HCl) and determination of end point with indicators.
3) Potentiometric acide-base titrations and titrations curve.
4) redox titrations (permanganatometric)
5) complexometric titration (determination of total and permanent hardness of water using EDTA)
Preparation of buffer system and control of buffer power.
behaviour of metals in the solutions of different ions. Elettrochemical series.
TLC for separation of leaves pigments.
determination by means of spectrophotometry UV-visible of concentration Fe 2+ in water samples. Calibration line.
are delivered everytime copies of experiences, with outline of teory.
Explication of experiences and laboratory exercitations