How to review chemistry for science students in the third year of high school?

First follow the teacher to go through the things in the book, and then you must summarize yourself, and after the summary, you will consolidate the knowledge in the book while doing the questions. When you have any doubts about knowledge, you must solve them in time, and it is best to check the original version of the book by yourself. I remember that before the college entrance examination, I could vaguely remember the position of each knowledge point in the book.

It is said that the master is clearly remembered.

In fact, it is more realistic for chemistry to catch up with the average level in the third year of high school The key is to keep up with the teacher's progress Complete the day's review plan on time every day If you really can't solve complex problems, just give up Take down all the notes you can take in class Go home at night and review in time Make some wrong questions appropriately Review in the third year of high school Review is very comprehensive As long as you can pass the knowledge points one by one Get a score of 70 out of 100 is absolutely no problem There is also to be cheeky Absolutely don't love face Hit the swollen face worm fat man At this time, you have to put down your face If you don't understand anything, ask the teacher desperately Classmates, once and again again The person who laughs at you is a real fool Make timely marks on the places that you don't grasp well, review these places often, or write down some knowledge points that are often forgotten in the small book you carry with you, and the inside of the cover of the book, look through it at any time, I think you can do this, you can keep 70 to 80, if you have a bright brain, you can also rush 90.

There is no need to look at organic chemistry at the university.

In organic chemistry in college, every reaction will have a reaction mechanism, and the unfamiliar reactions involved in the college entrance examination are all based on the information to be able to see the relative changes of each part. In general, there are three types: unfamiliar substitution, unfamiliar addition, and unfamiliar redox.

In addition, if you really want to see some of the reactions you have seen in the college entrance examination, you can selectively take a look (don't delve into the principle):

Ozone water reduction of olefins, potassium permanganate oxidation, olefin metathesis, diese-alder reaction.

Fuk alkylation of benzene rings, Fuk acylation, interadjacent pair localization rules of benzene rings.

Acylation of phenol (utilization of acid chloride, utilization of anhydride).

Aldol condensation (preparation of cinnamaldehyde) reaction of carbonyl oxygen of aldehydes or ketones with active hydrogen (preparation of phenolphthalein, phenolic resin, bisphenol A).

Memorize the structural formula of the substance.

Cinnamic acid, coumaric acid, coumarin.

Succinic acid, maleic acid, fumaric acid, malic acid, tartaric acid, tannic acid.

Familiarize yourself with the Common Exam Template:

PXMA polymethacrylate template, DXP (DBP, DAP, DMP, etc.).

HCN to prepare a-hydroxy acids for cyclocondensation, etc.

Make good use of unsaturation: two unsaturations of a certain acid C9H8O2, it can be seen at a glance that in addition to the carboxyl group (1), the benzene ring (4) has a double bond left, so it is most likely cinnamic acid. Such methods abound.

The number of words is limited, and it is not possible to say it completely, summarize a sentence, and every time you do a problem, you must refine the model of the topic to find out the common ground. Make good use of unsaturation and some structural cues (NMR, monochloride species, presence or absence of methyl groups, how many methyl groups there are, etc.) to determine the molecular structure. Memorize the material structure that is often examined.

We believe you have the opportunity to make a rapid leap forward like our students!

You should never look at organic chemistry at university!! The college entrance examination is very simple, just be careful, and when you can't push it out, because you are not familiar with the nature of matter, take a look at it!! There is also the need to understand the characteristic reactions of substances.

And I think the most important thing is to memorize the basics, like the special and iconic properties of each substance.

So it's easy to see if it's in the question.

There are also the properties of various substances, such as hydrocarbons, alkynes, lipids, alcohols, aldehydes, what kind of reactions can occur, who can react with, what is the principle of the reaction, and which bonds will be broken by the reaction.

If you can figure out the basic properties and reaction principles, there should be no problem with the inference questions, and even if they are information questions, they will be based on what they have learned in the textbook, so they won't be too difficult! Good luck in the Chemistry exam! ~~

It is not necessary, the key to the information is to read it.

1. Divide into categories and grasp them one by one.

There are so many organic chemical things, and the method of grasping the beard and eyebrows is definitely not worth advocating. We need to learn to classify according to certain criteria, and the most common classification is to distinguish according to functional groups. To put it simply, it is classified according to double bonds, triple bonds, hydroxyl groups, etc., and the classification does not need to be very detailed, but it is necessary to put things that have the same points together.

After classifying, the thing to do is to understand the properties of each type of substance and how it reacts. Here it is still recommended that students draw a table by themselves, and summarize it according to the logic of "what kind of structure is what substance, what kind of properties have what properties, and what kind of properties lead to what reactions". When you summarize it all, it will definitely have a very profound impact.

2. Learn from point to surface.

For example, in organic chemistry, with the functional group as the main axis, it is necessary to distinguish the characteristics of the functional group, the formation rules of organic compounds (mainly the carbon chain and benzene ring rule), and all organic reactions and test points revolve around this formation rule and functional group characteristics.

3. Pay attention to accumulation.

Learning organic chemistry is a process of gradual accumulation, timely summary of the learned content, classification and induction of many knowledge points, with points (knowledge points) to draw lines (main lines of structure and properties), from the line to the surface (the basic properties of a certain class of compounds); In this way, we can not only have an overall overview of what we have learned, but also take the essence of it and make the book thicker and thinner, which is not only conducive to a relatively complete and systematic study and review of what we have learned, but also conducive to grasping the key points, mastering the basic content, and laying a good foundation for the study of subsequent contents. Especially at the end of the semester, it is very important to do a good job of summarizing and summarizing organic chemistry and achieving good results.

4. Don't fight unprepared battles.

As mentioned earlier, learning organic chemistry is a cumulative process, so it is destined to be "temporary cramming" that will not work!

No matter which discipline it is, we must pay attention to daily learning, pay attention to daily accumulation, the so-called "grinding guns are not fast, but they are also light", which may be useful in a short period of time, but it is not suitable for long-term learning strategies.

The above are some ways to learn organic chemistry, it is recommended that students change their learning methods according to their actual situation, after all, only what suits you is the best!

It's better to ask your teacher questions like this, after all, he has more authoritative information.

As far as my previous experience is concerned, I think the most important thing is to follow the pace of your chemistry teacher, and then do a comprehensive paper of science over the years, you can gain a lot of experience from it, and you can also find out where there will be more problems when you do it. Don't say that you won't do the comprehensive paper if you don't finish the review now, it is also necessary to do a few sets of comprehensive papers before the first round of review.