What is solution in chemistry class 12
Chemistry topics 12 class lower saxony
Using selected aromatic compounds, the students compare the characteristic reaction behavior of this class of compounds with that of known hydrocarbons. In doing so, they also become aware of the limitations of previous bonding models. Mesomerism complements these model concepts and forms the basis for understanding bonding in aromatic molecules. When dealing with the reaction mechanism of electrophilic substitution as well as the influence of an aromatic residue on the properties of known functional groups, the students repeat important basics about structure-property relationships of organic molecules from grade 10 and learn that aromatic compounds play an important role as basic materials of numerous everyday products.
The development of the relationship between the physical and chemical properties of substances and the molecular structure also leads the students to aspects of healthy nutrition and makes clear to them the role of fats as renewable raw materials. Starting with soaps as the most widely known surfactants, they learn not only about the mode of action of detergent substances, but also about the importance of synthetic surfactants in everyday life today.
What is a solution in chemistry?
In chemistry, a solution is a homogeneous mixture consisting of two or more chemically pure substances. It contains one or more dissolved substances (the solutes) and a solvent (which may itself be a solution), usually the substance that is present in greater quantity.
What is a solution example?
Example of a real solution
B. in an aqueous sugar solution, the sugar molecules are evenly distributed between the water molecules in such a way that each volume part of the solution contains the same number of sugar or water molecules. The solution therefore has the same composition everywhere (homogeneous).
Chemistry 12 class high school tasks
Method: experiment, group work, panel discussion - working time: 180 min, soil, glyphosate, agriculture, pesticidesTeaching sample importance and value of soil. Agriculture and pesticides. Organic and conventional agriculture. Glyphosate.
Working time: 45 min, isotopes, average atomic massThe average atomic mass of chlorine is given as 37.5 in the PSE. The SUS form hypotheses how this value can come about, although there are no half elementary particles. The SUS are taught that atoms differ in the number of neutrons.
What is a solution in chemistry
Preparation of acetone from propan-2-olAcetone can be obtained from the alcohol propan-2-ol by oxidation with potassium permanganate. The students should have knowledge of the functional groups of alcohols and ketones.
Detection of aromatics (in gasoline)In this experiment, aromatics are to be detected by means of a converted Friedel-Crafts alkylation and the resulting colors. This method should also be used to detect aromatics in gasoline. The students should already have had some experience with dyes - otherwise the color effect of large delocalized electron systems can also be discussed here.
Influence of temperature on chemical equilibriumThis experiment illustrates the influence of temperature on the shift from a chemical equilibrium. It can be treated in connection with the "Principle of the smallest constraint" of Henry Le Chatelier.
Influence of concentration on chemical equilibriumThe experiment illustrates the influence of concentration on the shift of a chemical equilibrium. It can be treated in connection with the "Principle of least constraint" by Henry Le Chatelier.
Chemistry 12 class topics
Keywords chemistry_new, secondary level I, atomic structure, elements of the main groups, complex compounds, basics, nomenclature of complex compounds, subject didactic basics, subject scientific basics, open forms of teaching, substitution lessons, functional group, substance class, double bond, triple bond
The content covers the basic topics of organic chemistry, which should be present in the learners at the end of the 10th grade. The article Chemistry at the Christmas Market is therefore also wonderfully suitable for repeating and consolidating the topics already worked on in class.