Regarding a little difficulty in high school chemistry, I hope to be helped

In fact, there are certain skills in learning any subject, skills + mind is the easiest to succeed, to give you a few tips, can be used in chemistry or other disciplines to learn.

1. Students who don't understand generally don't pay 100% attention to the blackboard, if you want to learn, you must first listen carefully, and the most obvious manifestation is to be able to see the teacher's occasional board mistakes in the first time.

2. Make up for what you haven't learned in class, first read the textbook, just read it seriously, the overall knowledge of chemistry seems trivial, not easy to organize, but each chapter is connected, you want to learn a chapter, don't just learn a class, it's useless.

3. In fact, organic chemistry is easier than inorganic chemistry, you will not be because there is no summary or less summary, can not be flexibly applied, it is recommended that you use a chapter of white paper to organize the content of the chapter of organic chemistry and summarize the key points, do not need to look for books when you can't do the question, and at the same time have an overall concept in your mind, which is easier to remember.

The reaction you said is not proficient, and you have to do more questions, I hope this suggestion, and if there are any additional questions to ask.

Organic chemistry is actually the easiest part of chemistry!! The vast majority of our lives are organic! You can learn organic chemistry very easily!

For example, isomerism! You can find some plasticine and make it your own with matchsticks! Slowly you can find a pattern!

The key is symmetry (carbon chain isomerism), which is more examined! The most difficult spatio-temporal isomerism and functional group isomerism in isomerism (functional group isomerism is the focus and difficulty of the college entrance examination)! These have a lot of spatial imagination!

It is recommended that you ask the teacher more, starting with simple content, today's students rarely ask the teacher questions, which is a misunderstanding of learning! You can think about whether you have almost never asked the teacher questions! Communicating with teachers is an important way to learn!

Hello landlord! I'm a freshman, and I used to be good in chemistry in high school, generally 90+, and our full score was 108. Okay, to get to the point, chemistry you must be familiar with common chemical reaction equations, it is recommended to buy a small book for 2 yuan, called a through train.

Memorize the equations inside, and then classify the classic equations, for example: acetaldehyde + ethanol = ethyl acetate + water, you can think like this, acetaldehyde can be replaced with formaldehyde, propionaldehyde, acetic acid can be replaced with formic acid, propionic acid and so on. So you have memorized the reaction of aldehydes and acids.

You say that inorganic is difficult, in fact, inorganic is very regular, you just need to remember: the hydroxyl group is oxidized to the aldehyde group, and the aldehyde group is oxidized to the carboxyl group; The carboxyl group is reduced to obtain an aldehyde group, the aldehyde group is reduced to a hydroxyl group, and the aldehydes and acids are reacted to obtain lipids. Plus some knowledge of features such as:

React with copper hydroxide and produce red, then this thing is aldehyde. Organic inference questions are basically no problem!

As for isomers, you have to change the number of carbon in the main bond regularly, and then change the position of aldehyde group, hydroxyl group, methyl group, etc. to get the answer, I believe it will be difficult for you!

Also, chemistry is the closest science to the liberal arts, and there are many things to remember, so you should usually remember more of those scattered knowledge, such as: metals that can react with both acids and bases - generally aluminum! These things are useful for inference questions!

That's it.,It's pure hand.,My personal opinion,I hope it's useful to the landlord.,I wish the landlord a great success in his studies!

Give it the best! Hehe.

Organic chemistry is mainly a combination of several properties common in books, such as hydroxyl group, acid group, aldehyde group, esterification properties, etc., so it is very important to grasp the properties in the book well, and it is easier to do homework, I hope it will help you.

Summary. Whether an individual can find problems or be good problems in the learning process indicates the strength of his learning level and ability. From the perspective of students' learning of chemistry, it is often one of the common problems in the process of learning chemistry that students do not have problems or cannot ask good questions.

The reason for this problem is that the basic knowledge in the learning process is not reliable, and it is not good at grasping the internal connections and differences between things, and it is not good at observing and thinking. Because of these deficiencies, many students turn a blind eye to the problem and fail to spot it. The learning process is one of constantly discovering problems and solving them on that basis.

End. The process of reciprocating and reciprocating. Therefore, if you don't ask for a good idea, you can't take the initiative to learn, which will lead to learning to buy one and get one free.

High school chemistry, I'll ask some questions.

Whether an individual can find problems or be good problems in the learning process indicates the strength of his learning level and ability. From the perspective of students' learning and learning, it is often one of the common problems in the process of learning chemistry that students do not have problems or cannot ask good questions. The reason for this problem is that the basic knowledge in the learning process is not reliable, not good at grasping the internal connections and differences between things, and not good at observing and thinking.

Because of these defects, many students turn a blind eye to the problem and are unable to spot the chain car volt problem. The learning process is a process of constantly discovering problems and solving problems on this basis. Therefore, if you don't ask for a good idea, you can't take the initiative to learn, which will lead to learning to buy one and get one free.

The fourth size relationship, why are carbonate ions greater than bicarbonate ions?

The primary ionization of dibasic acid is much greater than the secondary ionization, which is the law that the equilibrium can prove, from a microscopic point of view, the carbonate ion with two negative charges, the junction of the megahydrogen ion is naturally stronger, and the bicarbonate section of the blind root ion holds a negative charge, and there is a proton in the outer layer, which is naturally weak.

Both carbonate and bicarbonate will be hydrolyzed in water, and the mu is forming carbonic acid. In this process, water gives hydrogen ions, so hydroxides are left to make the system alkaline. However, the ability of carbonate and bicarbonate to bind hydrogen ions is different, so the number of hydrogen ions given by water is also different, resulting in different alkaline strengths of the system.

We'd be glad to be able to help you, do you have any other questions that you can ask us to help you? If not, can you give Shoujue a thumbs up? At the same time, if you have any other questions in the future, you can click on my avatar to enter my slim homepage for consultation, I wish you a happy life, goodbye. ❤️

It doesn't matter what reaction 1 is positive, then 2 is positive, consumes hi, then reaction 1 is positive again, and 2 consumes hi

Since the title says, balance, just use the concentration at the time of equilibrium, don't worry about 1 2 How to match it well and then balance, the reaction will balance itself, don't worry, you just need to know the concentration at the time of equilibrium.

k=4*5=20

The remaining unresponsive ones are: 5molNH3 and 4molHI. That's 20.

1.It's really not that hard to learn chemistry well. There's a lot of content, so you'll have to build a notebook.

Write down the knowledge points that you don't know and are not familiar with, and don't remember those that are too biased. I have to write down what the teacher said casually!! It works!

Sometimes the teacher emphasizes too much, so that we ignore the emphasis that the teacher has not emphasized, but this may be a good shortcut to understand the knowledge points. Pay attention to summarizing more, summarizing yourself is much better than looking at the ready-made materials!

2.I believe that the accumulation of quantity has reached a qualitative leap, and the slow accumulation will make you directly face the unfamiliar and unfamiliar when you open the note, and this is how kung fu is used on the blade, don't forget to organize, compare, and summarize. You can even write down your feelings directly on the knowledge points that seem awkward.

3.Repetition is power, it is recommended to read it early to memorize! It's important to remember repetition.

Learning chemistry focuses on summarizing, taking more notes in class, doing more exercises after class, and familiarizing yourself with textbooks. In fact, there is not much content in high school chemistry, but there are many things that need to be memorized. In short, you have to take more notes, summarize more, as long as you have something that you can't do, write it down, and then slowly ponder, why?

There will be progress that way. If you spend one and a half hours a day, you'll learn pretty well. Pay attention to the lectures...

Preview before class, so that you can focus on listening to what you don't understand during the preview process. Take more notes in class, because the teacher has gone through a lot of practice and summarized the essence of things, so you must listen attentively in class; You must practice after class, the truth is like learning to swim, no matter how good your theoretical knowledge of swimming is, if you don't swim in the water, when the flood comes, it is always you who drowns.

After learning, you have to summarize by yourself, form a network of knowledge, there are a lot of knowledge to memorize, if you don't summarize the knowledge you have learned, it will be very messy, it is recommended to prepare a notebook, so that it is convenient for you to review in the third year of high school, chemistry is not something you can solve the problem with just your back!

Memorize more, do more exercises. Persist for two years, and you will be liberated in the third year of high school. Study hard in the first and second years of high school, and the pressure of the third year of high school is completely wooden!

Add a little to him! Chemistry, I think it's more about comprehension, because there are so many things to memorize that I can't remember at all.

Let the b of the reaction be xmol, 2a (gas) b (gas) 2c (gas), the original: 1 3 0 reaction: 2x x 2x the amount of total substances after the reaction:

1+3-2x-x+2x=4-x density is proportional to the amount of the substance, so density before reaction: density after reaction = 4: 4-x = 9:

10 solution x=

i.e. a participates in the reaction by 2x= so the reaction rate is:

First of all, the ratio of density is equal to the ratio of molar mass (a corollary of Avogadro's law), and the total mass is conserved, so it can be reversed to get the inverse ratio of density equal to the amount of matter.

Then, list the three lines, start, change, and equilibrium, assuming that the amount of change in b is x

There is an equation: (4-x) 4=9 10 Find x= So the amount of change in a is , and the rate of reaction is (

The amount of increasing jujube friends is divided by 5L of Xuyan and then divided by 30s, the answer is, this is the speed of NO. According to the ratio, NH3 is obtained, O2 is , and H2O is the difference front.

I calculate the speed of の.

In the ratio of the number of measurements to calculate the others.

c(h+) is in descending order.

C-digging letter. Armor.

Second. The order in which the pH is ranked from smallest to largest is. Second. Armor.

Third. Observed to be abundant.

Hydrochloric acid. The rate of bubble formation in the test tube is faster. At the end of the reaction, the total volume of gas produced in the two tubes (in the same condition) is certain.

Same (fill in "equal" or "not equal"), the reason for which is:

The amount and concentration of the substance are the same, and the volume is the same; then the amount of H ions is absolutely the same, and H2 can be produced; The amount is of course the same.