Is it difficult to test the chemistry test paper in Guizhou college entrance examination, with analysis and solution of the test paper?

1.Is it difficult to test the chemistry test paper of Guizhou college entrance examination in 2022? In 2022, the difficulty of Guizhou college entrance examination chemistry paper may increase. The difficulty trend of the 2022 college entrance examination exposed the proposition orientation of the 2022 college entrance examination announced by the senior high school entrance examination, and pointed out the direction for candidates to prepare for the exam. The overall goal is to pay attention to the development and progress of science and technology, social and economic development and excellent traditional culture. The characteristics of the question type are as follows: first, flexible and open examples examine the imagination of candidates, and there are many groups of correct answers and various problem-solving schemes to choose from; Second, appropriately set up ill-structured questions to examine candidates' understanding of the nature of chemistry, and guide middle school chemistry to attach importance to cultivating chemical core literacy in the teaching of chemical concepts and methods; Third, open questions in an orderly way, to examine candidates' logical reasoning ability and operational problem-solving ability, to reflect openness, and to examine the accuracy and order of candidates' thinking.

Two, Guizhou college entrance examination chemistry questions and answer guide.

1. When arranging the sequence, distinguish from "from big to small" or "from small to big", and similarly, from strong to weak and from high to low.

2. When writing a chemical equation, distinguish whether it is an equal sign or a reversible sign. For example, the reversible symbol is generally used in the brine hydrolysis equation, and the product cannot be marked "↓" or "↑". The ionization of weak electrolyte must use reversible sign instead of equal sign.

3. If there is a unit, write the unit; If there is no unit, don't write. For example, the unit of "solubility" is g, the unit of molar mass is g.mol- 1, the amount and concentration of substances, etc. If you don't write the unit, you will be deducted. Units should be expressed in letters, not Chinese characters.

4. It is required that the name must be written in Chinese characters, and the molecular formula or other chemical formulas cannot be written. Schematic diagram of electron, atom or ion structure, simple structural formula, structural formula, ionic equation, etc. It should be written clearly to prevent being arrogant.

5, pay attention to the state of sulfur trioxide, ethane, hexane, water, hydrogen fluoride and other substances. Distinguish between liquid hydrogen chloride and hydrochloric acid, liquid ammonia and ammonia water, liquid chlorine and chlorine water.

6. Please pay special attention to whether the directivity of multiple-choice questions is "true" or "false".

7. Fully describe the experimental phenomenon, and conduct it in all directions by land, sea and air. Don't be simplistic.

8. To prevent the ion charge from being confused with the valence of elements, the anode and cathode of primary battery, the anode and cathode of electrolytic cell and electroplating pool.

9. The chemical calculation errors are as follows:

(1) The chemical equation is wrongly written or disconnected or connected;

(2) When calculating with relational expression, the quantity of matter ignores some access relations;

3 discussing problems, lacking discussion process;

④ The calculation result must be accurate;

⑤ It is required to write the calculation standard flow, and the steps shall not be omitted, and the calculation process shall be in units. Pay attention to the implicit requirement of significant figures in the question.

10, inference question, according to the meaning of the question, inorganic matter and organic matter should be considered comprehensively. Pay attention to keywords and key steps.

1 1. When answering short answers, be sure to avoid "simplification". When it comes to principles, there must be cause and effect, and the answer is "fundamental". If you fill in the physical quantity, you should also pay attention to the unit.

12, balance any equation, and finally "simplify the coefficient" without false balance. Organic chemistry equation should use "→"; The thermochemical reaction equation does not omit the "+"or "-"sign of the aggregate state or the heat of reaction, and the unit of the heat of reaction is kj mol-1. Pay attention to balance, conditions and symbols when writing equations.

13. When you encounter similar problems, you must not get carried away. You should look at the problem carefully, find the right keywords, find the right breakthrough, and don't lose your mind. When you encounter difficulties, you should be more calm. You know, it's hard for everyone. It should be noted that there are also small items that are easy to score in difficult problems. You should read and solve problems to get these small points.

14, don't be "abnormal" during the exam. It's still easy first, then difficult. Do the first volume first, and then do the second volume.