The Nature of Substances
Course code
old course code
Course title in Estonian
Ained ja loodus
Course title in English
The Nature of Substances
ECTS credits
Assessment form
lecturer of 2022/2023 Autumn semester
lecturer not assigned
lecturer of 2022/2023 Spring semester
lecturer not assigned
Course aims
To arouse interest in water as an everyday essential substance, to understand the importance of this compound in organic and inorganic world, and to know the physical and chemical qualities of the substance.
To know characteristic parameters of dispersed systems, theoretical principles of water purification and to obtain the skill of carrying out experiments accentuating simpler purification methods.
To know the structure of atom and corelate it with patterns of periodic system, and to determine potential oxidation values.
To know the composition of air, the effect of its components on environment, oxygen as the most essential oxidizer of nature.
Be able to draw up the formulas of the representatives of main classes of inorganic substances, and corelate them with minerals and mineral fertilizers found in nature.
To acquaint oneself with the teaching methods and opportunities for developing cognition of nature in the frames of natural science course of the 2nd and 3rd levels of study.
Brief description of the course
Water as an oxide. Associates, hydrogen bond, water as a solvent. Genuine solutions, pseudosolutions, coarse dispersion systems (emulsions, suspensions, aerosols). Ways to express concentration (% concentration, molar concentration, solving tasks according to adequate didactics). Hardness of water, its disposal facilities. Theoretical bases of water purification. Mineral and organic fertilizers, pesticides. Atmosphere. Composition of air, ozone, its characteristics and environmental effect, exploitation opportunities of ozone. Air as dispersion environment. Structure of atom, nucleons. Periodic system, its structure and interpretation to characterize the atoms of specific elements and to prognosticate their characteristics. Drawing up the formulas of the representatives of main classes of inorganic substances, application of solubility table. Correlation of minerals and fertilizers with the representatives of main classes. pH of solutions, understanding and determining of the importance of acidity and alkalinity of natural waters and soil.
Handling didactic questions related to the topics.
Practicing tasks on the subject: percentage and molarity calculation; drawing up the formulas of inorganic compounds; drawing up electronic structural schemes of elements and ions and obtaining the mastery of their interpretation.
Laboratory works: 1) preparing solutions of certain concentration; 2) familiarizing with methods of water purification (distillation, filtration, use of separating funnel); 3) experiments characterizing the composition of air; 4) characteristics of oxides and their effect on environment (acid rains, soil acification, liming); 5) characteristics of acids (corrosion, rusting etc).
Learning outcomes in the course
Upon completing the course the student:
- can evaluate the qualities of water according to analysis of molecule structure and chemical bond (solubility and associate formation) and can solve the syllabus-based tasks;
- performs experiments on water purification and explains the theoretical and didactic grounds;
- knows the most important fertilizers and knows the environmental effects of pesticides and fertilizers;
- knows the composition of air and the effect of components on environment and the oxidizing qualities of oxygen;
- knows the components of atom and can draw up electronic structural schemes for atoms and ions;
- explains the structure of periodic system and corelates the knowledge with atom structure, draws up formulas;
- understands the importance of pH on environment;
- is able to explain the material taking into consideration the age peculiarities of schoolchildren of the 2nd and 3rd levels of study and didactic principles.
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