High School Chemistry Key, What is the focus of high school chemistry?

I am a student studying chemistry education, in my opinion, the key to chemistry is to understand the principle of chemical reactions, so that you can draw inferences, understand the principle of this kind of reflection you will write all the chemical equations of this kind of reaction, in addition, chemistry is a bit of a liberal arts characteristic, memory is also very necessary, the equation memorized more, you will naturally be able to understand the law. Whether it is a substitution reaction or a redox reaction, pay attention to their differences and their respective characteristics. After studying it for a while, you will find that chemistry is not difficult at all.

I don't know what chemistry is like in your consciousness, but chemistry is in my consciousness like the concept of physics. In many physics, mechanics is still studied, but chemistry is a combination of microscopic physics and mathematics. Although chemistry changes the objective properties of matter, it is still composed of elementary particles from a microscopic point of view.

Particles are a very abstract thing, in fact, they are like some shrinkage in common sense, it depends on your imagination! As long as you analyze it fundamentally, all problems can be solved. It's a hassle to explain this question clearly, it depends on your understanding!

If you grasp the properties of chemical substances, the equations are easy to write according to their properties, except for some special reaction formulas, which generally do not need to be memorized. In the liberal arts of chemical form science, you have to memorize, read and write more, work hard, I studied chemistry, and I love it very much.

If you have a firm grasp of the basic knowledge, do more 5.3, and your grades will naturally go up.

High school chemistry is actually very easy. Don't be afraid of those equations. Well, there are a lot of chemistry experiments in high school, and participating in the teacher's experiments will make you deeply impressed by chemistry and cultivate your interest. If you don't know, you need to ask the teacher more.

It can be said that there are many key points in high school chemistry, I learned the people's education version, compulsory one or two, which must be familiar with the heart, and it is also the most basic, throughout the study of high school chemistry, for example: compulsory one, the amount of matter, it can be said that it can be used everywhere in chemistry.

Elective ......Personally, I think it is difficult to take elective four, chemical equilibrium movement, ion concentration, thermochemistry and electrochemistry, so you can only master them well if you study hard and hard in these places, otherwise they will be a huge stumbling block on the road to learning chemistry, and it is also a ......place where chemistry opens up the scoreIt is also the ...... of the gap between those who are the best in chemistry and the average student

Be careful, I believe you will succeed ......

The focus is generally on the difficult part.

The difficulty is not the point.

The most trunk part:

1. Electrochemistry: galvanic cells and electrolytic cells.

2. Equilibrium system: chemical equilibrium, ionization equilibrium, hydrolysis equilibrium, precipitation-dissolution equilibrium 3, redox reaction.

4. Organic chemistry.

5. Chemical experiments.

1,2AG++SO42-=AGSO4 precipitation.

2,** is calculated according to silver sulfate ksp=cag+ 2 x cso42- =.

Cag + 2 x CSO42- = means that the silver sulfate solution is saturated, and this product is greater than KSP and there is a precipitate.

Less than is very unsaturated, and the concentrations of Ag+ and SO42- are not necessarily in a fixed proportion, but the product is a constant of the constant solubility product.

I don't understand the multiple-choice question, what is the volume of 3 drops, is 20 drops counted as 1ml.

However, according to the solubility product, we know the concentration of one ion and find the other.

Hypothesis 1 Formation of water-soluble aghso4,4, experimental protocol.

Silver sulfate solid was added to nano3, and a precipitate was formed, and then concentrated nitric acid was added to precipitate and dissolve.

Then calcium sulfate is added to nano3, and a precipitate is formed, and then concentrated nitric acid is added to dissolve if the precipitate. The explanation is that hypothesis 1 is true.

Both form soluble bisulfate, if it is still insoluble, then hypothesis 2 is true.

5. SO42-+H+=reversible=HSO4-, H+ increases greatly, the equilibrium moves positively, the concentration of HSO4- increases, and SO42- decreases.

Ag2SO4 = reversible = 2AG++SO42-, SO42- decreases and the dissolution equilibrium moves positively, so that AG2SO4 gradually dissolves due to the increase of H+.

In fact, like silver sulfate, barium sulfate can also be dissolved in nitric acid, but the concentration of nitric acid is much higher than that of dissolved silver sulfate, because.

The solubility of barium sulfate is smaller than that of silver sulfate, and the dissolved is less ionized SO42-).