The written examination of Shanxi special post teachers is generally conducted in mid-July, and the examination subjects are educational theoretical knowledge and subject knowledge. If you are applying for the position of chemistry teacher, then the chemistry subject is what you need to review. Of course, the focus of the examination of chemistry subjects is different, and some basic chemical concepts and chemical reactions will be examined. So how do teachers in Shanxi Tegang prepare for the written test in 2020?

Examination questions and contents:

The total examination score is 100, and the examination time is 2 hours. The examination content is divided into educational theoretical knowledge and subject professional knowledge, and subject knowledge accounts for 90 points. There are multiple-choice questions, fill-in-the-blank questions, experimental inquiry questions, calculation questions and so on. For the examination of chemical professional knowledge, all modules (basic concepts of chemistry, chemical reaction principle, elements and their compounds, organic chemistry knowledge, chemical experiments) will be involved, and most of the test questions come from college entrance examination questions over the years or chemical model questions in senior high schools in various regions.

Test difficulty:

Generally speaking, the exam is not difficult, but for candidates, the scope of review is relatively wide and they need solid theoretical knowledge. On the basis of understanding the theory, they should do more different types of problems and expand accordingly.

Preparation method of each module:

1. Basic concepts of chemistry

(1) chemical terms and chemometrics: ① schematic diagram of atomic structure, electronic writing, structural formula and structure simplification;

② Avogadro's constant, avogadro's law and the molar volume of gas (applicable scope and conditions);

(3) The preparation steps of a substance concentration solution, matters needing attention in the use of the volumetric flask, and error analysis.

(2) Periodic Table of Elements and Periodic Law of Elements: comparison of metallicity and nonmetal of the same period with the main group (comparison of electronegativity and first ionization energy); Comparison of particle radii with the same electron layers.

(3) Ion reaction: ion reaction equation writing (charge, electron and atom conservation), ion coexistence problem (one color, two properties and four reactions).

(4) redox reaction: increasing the degree of reduction to obtain the degree of reduction; The oxidizability of oxidant is greater than that of oxidation products; Common oxidants and reductants.

2. Chemical reaction principle

(1) Primary cells and electrolytic cells: bipolar three-way two-way reaction, chemical power supply (hydrogen-oxygen fuel cell, methane fuel cell), electrolytic cell application (copper electroplating, copper refining, chlor-alkali industry);

(2) Chemical balance: factors affecting chemical balance, Le Chatterley principle;

(3) Electrolyte solution: ionization equilibrium of weak electrolyte and its influencing factors;

(4) Hydrolysis of salt: three conservation, hydrolysis law (the weaker, the more hydrolysis, which involves the alkaline comparison between strong base and weak acid salt); Comparison of particle sizes in solution (main particles are in the front row, new particles are in the back row, ionization and hydrolysis are compared, and whoever is stronger comes out first).

3. Elemental compounds: common metals, nonmetals and their compounds (basic knowledge, transformation between substances combined with experimental investigation);

4. Organic chemistry: the distinction and mutual transformation of hydrocarbons, halogenated hydrocarbons, alcohols, phenols, ethers, carboxylic acids and esters; Isomers and homologues;

5. Experimental chemistry: storage and use of reagents, commonly used experimental instruments and basic experimental operations (combined element compounds);

Candidates can learn from the above knowledge when reviewing, focus on breakthroughs and strengthen practice.

The above is the introduction of the chemistry written test preparation for teachers in Shanxi Tegang in 2020. Judging from the situation in the past three years, the special post written test is not difficult, but the number of applicants is increasing year by year, so we can't take it lightly. The knowledge of chemistry is relatively broken, and there are many details to be tested. Candidates are advised to study ahead of time, take your time, and make sure that the written test scores are absolutely dominant. Combine the college entrance examination questions in the process of chemistry learning, sum up mistakes and puzzles, prepare for the exam smoothly, and come on!