What is chemistry and how to understand it

Chemistry majors can be engaged in chemical analysis, chemical engineering, chemical technology, quality management, etc. in technical enterprises, and can also be engaged in chemical blending, clinical chemistry, medical technology, pharmaceutical research and development in pharmaceutical enterprises.

Chemistry mainly studies the basic theoretical knowledge of chemistry and the basic operation skills of chemical experiments, including the chemical reactions and changes within a single substance and between multiple substances, and understands the mechanism and process of its change, such as: the combustion of goods, the rusting of steel, the decay of food, and the process of grain winemaking, all of which are chemical changes.

The main courses of chemistry are "Chemical Reaction Engineering", "Fundamentals of Chemical Engineering", "Inorganic Chemistry", "Organic Chemistry", "Analytical Chemistry", "Structural Chemistry", "Physical Chemistry", "Organic Chemistry Experiment", "Instrumental Analysis Experiment", etc. Some colleges and universities are trained in the following professional directions: science, medicine, industrial analysis, chemical pharmacy, analysis and testing, and fine chemical industry.

The universities include Tsinghua University, Zhejiang University, Shanghai Jiao Tong University, Nanjing University, Fudan University, University of Science and Technology of China, Huazhong University of Science and Technology, Wuhan University, Sun Yat-sen University, Harbin Institute of Technology, Beijing Shishu Mofan University, Sichuan University, Dongduan Yundounan University, Chinese Renmin University, Nankai University, Beijing University of Science and Technology, Shandong University, Xiamen University and so on.

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1.Chemistry plays an important role in guaranteeing the survival of human beings and continuously improving the quality of life of human beings. Such as:

the use of chemicals to produce fertilizers and pesticides to increase food production; The use of chemical synthesis of drugs to inhibit bacteria and viruses to protect human health; the use of chemistry to develop new energy and new materials to improve the living conditions of human beings; The use of chemistry to comprehensively apply natural resources and protect the environment to make human life better. 2.Chemistry is a practical discipline, which, together with mathematics, physics and other disciplines, has become the foundation for the rapid development of natural sciences.

The core knowledge of chemistry has been applied to all areas of the natural sciences, and chemistry is an important pillar of the powerful force that creates and transforms nature. At present, chemists use the perspective of chemistry to observe and think about social problems, and use the knowledge of chemistry to analyze and solve social problems, such as energy problems, food problems, environmental problems, health problems, resources and sustainable development problems. 3.

The intersection and penetration of chemistry and other disciplines have given rise to many marginal disciplines, such as biochemistry, geochemistry, cosmochemistry, ocean chemistry, atmospheric chemistry, etc., which have led to the rapid development of science and technology such as biology, electronics, aerospace, laser, geology, and oceanography. Nowadays, chemistry is increasingly permeating all aspects of life, especially major issues closely related to the development of human society. In short, chemistry is closely related to human clothing, food, housing, transportation, energy, information, materials, national defense, environmental protection, medicine and health, resource utilization, etc., and it is a practical discipline urgently needed by society.

Thank you for the trouble to adopt!

Chemical formulas are useful, and there is a lot of chemical knowledge in life! After learning chemistry and knowing how it works, you will feel very satisfied! For example, let's talk about a few small experiments, do you know why when you submerge eggs in vinegar, the eggs will go up and down!

Because the main component of the eggshell is CaCO3, vinegar contains acetic acid, acetic acid can dissolve CaCO3 and produce CO2, CO2 will form bubbles around the eggshell, and it will float up with the egg, when the egg floats out, the CO2 is released into the air, and the egg will sink again! Also, you should have learned that CO is an odorless gas! But why do we smell a special so-called gas in the kitchen?

Because this is for safety reasons, the gas company has added special rare gas components to the gas, so that we can find out when there is a gas leak! Do you know why using fluoride toothpaste strengthens your teeth! The chemical formula of the tooth is [Ca5(OH)(PO4)3],,OH) makes the tooth alkaline, the so-called tooth decay is an acid produced by microorganisms and the tooth reacts with the original strong tooth into a solubluble, fluoride toothpaste is to change the chemical formula of the tooth to [Ca5(F)(PO4)3], which makes the acid produced by the microorganism have no effect on the tooth, and it also protects the tooth.

In fact, studying chemistry does not have to do research, it can make us better discover the joy of life, and we can explain some things by ourselves, don't you feel a sense of accomplishment! There are also many interesting phenomena that you will discover after learning a little more!

Chemistry is a science that studies the composition, structure, properties and laws of nature of matter.

Chemistry is the science that studies the composition, structure, properties, and changes of matter.

The word "chemistry" literally means "the science of change". Chemistry, like physics, is the basic science of natural science. Many people call chemistry "central science", which is the science that studies the composition, structure, properties and changes of matter.

Chemistry plays an important role in our understanding and use of matter, the world is composed of matter, chemistry is one of the main methods and means used by human beings to understand and transform the material world, it is a discipline with a long history and vitality, it is very closely related to human progress and social development, and its achievements are an important symbol of social civilization.

From primitive societies that began to use fire, to modern societies that use various man-made substances, humans have enjoyed the fruits of chemistry. Human life can be continuously improved and improved, and the contribution of chemistry plays an important role in this.

Chemistry is one of the important basic sciences, which has developed rapidly in the interpenetration with physics, biology, physical geography, astronomy and other disciplines, and has also promoted the development of other disciplines and technologies. For example, the results of nucleic acid chemistry have raised today's biology from the cellular level to the molecular level, establishing molecular biology; The analysis of the chemical composition of various stars has led to the law of element distribution, the existence of simple compounds in interstellar space, the experimental data for the evolution of celestial bodies and modern cosmology, and the enrichment of the content of the dialectic of nature.

Chemistry is an experiment-based science.

Chemistry is the science that studies the composition, structure, properties, and changes of matter, and the object of study is the composition, structure, properties, and change laws of matter.

Chemistry is the science that studies the composition, structure, properties, and changes of matter.

To study chemistry, you should first be familiar with the elements you are going to study, know how to use them, and what characteristics each element has. Then do more questions on the basis of familiarity, which will help you study and consolidate chemistry.

The most important thing is to memorize the equations, and the most important thing is to memorize the equations (especially the trim!). There are three trimming methods:1

Least common multiple method 2Observational method 3Odd number coupling method Secondly, the wrong question book is also very important, because correcting the mistake will really make you improve by leaps and bounds There is also to do a good job of after-school questions, the questions in the school workbook, which is very important, because they are especially for the new knowledge learned, and the training will have an obvious consolidation effect; The second is to carry out a lot of training on the amount of questions, there will be a qualitative change in quantity, at the beginning there is less experience will not do, a lot of mistakes, but slowly it will be better, and the inspiration will come up (it is recommended to use "5-year high school entrance examination 3-year simulation" or "5-year college entrance examination 3-year simulation").

Essentially, the methods are pretty much the same, but the main thing is that you have to be careful when you learn chemistry, it's a half-literate, half-science, you can't be lazy, so you have to be careful.