Special topics and analysis of chemistry and traditional culture

1.Is it difficult to test the chemistry test paper of Ningxia college entrance examination in 2022? In 2022, the difficulty of chemistry examination paper in Ningxia college entrance examination may increase. The tendency of the difficulty of the 2022 college entrance examination exposes the proposition orientation of the 2022 college entrance examination announced by the senior high school entrance examination, and points 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, Ningxia college entrance examination chemistry questions and guiding principles

For element inference, it is generally possible to draw a periodic table containing only short-period elements on draft paper first, and then infer against this table.

(1) For the element inference questions with breakthrough points, we can use the breakthrough points implied by the stem of the questions, contact other conditions, follow the trail, break through one by one, and draw conclusions;

(2) For the problem of element inference without obvious breakthrough, we can make use of the condition limitation of the problem to gradually narrow the inference scope and fully consider the relationship between elements to infer;

(3) Sometimes the qualifications are insufficient, we can discuss them and draw a reasonable conclusion. Sometimes there are more than one answer, as long as we can explain it reasonably. If the topic only needs one set of conclusions, choose the one you are most familiar with and confident about. Sometimes you need to use intuition, make bold attempts and assumptions, and then verify them according to the conditions given in the questions.