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Anonymous users2024-02-15Chemistry Elective 3 Introduction --- 1
Chapter 1 Atomic Structure and --- 2
Section 1 Atomic Structure ---4
Induction and Collation---25
Review question --- 26
Chapter 2 Molecular Structure and Properties--- 28
Section 1 covalent bond --- 29
Section 2: Three-dimensional structure of molecules---37
Section III: Properties of Molecules---47
Induction and Collation---58
Review question --- 59
Chapter 3 Crystal Structure and Properties--- 59
Section 1: Common Sense of Crystals --- 62
Section 2: Molecular Crystals and Atomic Crystals---68
Section III Metal Crystals --- 76
Section IV Ionic Crystals---81
Induction and Collation---86
Review question --- 87
Open Assignment --- 89
Periodic table.
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Anonymous users2024-02-14Chapter 1 Atomic Structure and Properties --- 2
Section 1 Atomic Structure ---4
Induction and Collation---25
Review question --- 26
Chapter 2 Molecular Structure and Properties--- 28
Section 1 covalent bond --- 29
Section 2: Three-dimensional structure of molecules---37
Section III: Properties of Molecules---47
Induction and Collation---58
Review question --- 59
Chapter 3 Crystal Structure and Properties--- 59
Section 1: Common Sense of Crystals --- 62
Section 2: Molecular Crystals and Atomic Crystals---68
Section III Metal Crystals --- 76
Section IV Ionic Crystals---81
Induction and Collation---86
Review question --- 87
Open Assignment --- 89
Periodic table.
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Anonymous users2024-02-13The three knowledge points of high school chemistry elective three are atomic structure and properties, molecular structure and properties, crystal structure and properties, atomic structure and properties of elements, molecular crystals and atomic crystals, and the three-dimensional structure of molecules.
Chapter 1 Atomic Structure and Properties.
Section 1 Atomic Structure.
Section 2 Atomic Structure and Properties of Elements.
Chapter 2 Molecular Structure and Properties.
Section 1 Covalent bonds.
Section 2 Three-dimensional structure of molecules.
Section 3 Destruction of the nature of the molecule.
Chapter 3 Crystal Structure and Properties.
Section 1 Common sense of crystals.
Section 2 Molecular Crystals and Atomic Crystals.
Section 3 Metal Crystals.
Section 4 Ionic crystals.
Ion coexistence, ion sorting, ion coexistence is actually very easy to do, precipitation, gas, double hydrolysis, weak electrolyte, complexes, redox, whether there is color, pH, these few sieves can be selected in a circle, if you are not proficient, it can only mean that the question is not enough (no way, this piece is more brushed to brush the question is familiar), this piece is really simple. Ion coexistence is simple, but ion sorting is a big problem, and it can be said to be one of the most difficult knowledge points to understand in the whole high school.
I don't think I understand this, at least not as well as the school teachers. All I can say is that you must make good use of the three conservations, which can solve almost all the problems of ion concentration sequencing. Also, we must have a vague idea of the approximate concentration.
What do you mean? Let's say you have ammonia, the pH is about 11, and now if you want to rank the particles in the solution, you first have to think about the concentration of each substance.
NH3·H2O is weakly electrolytically retarded, so the concentration is slightly less, pH is 11, so OH- is, the difference between the two is 100 times, and then NH3·H2O>OH->NH4+>H+ can be written by using charge conservation. Why build a concept of approximate concentration? Because when there is some inaccurate order, you can roughly judge by this.
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Anonymous users2024-02-12The four knowledge points of high school chemistry elective include chemical reaction and energy, ion balance in aqueous solution, chemical reaction rate and chemical equilibrium, electrochemical basics, electrochemical corrosion and protection of metals, and factors affecting chemical reaction rate.
Chapter 1: Chemical Reactions and Energy.
Section 1: Chemical Reactions and Energy Changes.
Section 2: Heat of combustion, energy.
Section 3: Calculation of the heat of chemical reaction.
Chapter 2, Chemical Reaction Rates and Chemical Equilibrium.
Section 1: Chemical reaction rate.
Section 2 Factors influencing the rate of chemical reactions.
Section 3: Chemical Equilibrium.
Fourth, the direction of the chemical reaction hall.
Chapter 3 Ion Equilibrium in Aqueous Solution.
Section 1: Ionization of weak electrolytes.
Section 2: Ionization of water and acidity and alkalinity of solution.
Section 3: Hydrolysis of salts.
Section 4: Dissolution equilibrium of insoluble electrolytes.
Chapter 4 Fundamentals of Electrochemistry.
The first section, galvanic battery.
Section 2: Chemical power supply.
Section 3: Electrolytic cell.
Section 4 Electrochemical Corrosion and Protection of Metals.
Moles, stoichiometry, ideal gas equations, etc. are actually a small difficulty in high school chemistry, and the best way is to. Brush questions. There's a trick to do this piece of content, and I can't teach you this skill directly, so I say that no amount of it can compare to your proficiency in remorse after brushing the question.
My advice is to carefully study the analysis for every question you think is valuable (including but not limited to wrong questions), and if you are wrong, you must do it again without reading the analysis, and make sure that you have mastered this method of doing the question.
Don't read the answer and think that you have no problem doing it next time, and then skip it, and continue to fall into the pit next time. Let's talk about the calculations again. Calculating this thing feels like a lot of skill, but you really can only rely on your own ability.
My calculations have also gone from very bad brushing questions to passing, so let's go and brush them. It's still the same, focus on researching and redoing valuable questions, and if you think it's really good, you can copy it into the wrong question book, and do it again after a while, you may not be able to do it right.
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Anonymous users2024-02-11The knowledge points of the high school chemistry selection of the people's education version include entering the chemical industry, chemistry and resource development and utilization, the development of chemistry and materials, the development of chemistry and technology, polymer compounds and materials, and the comprehensive utilization of seawater.
The first unit is to enter the chemical industry.
Topic 1: Basic problems in the chemical production process.
Topic 2: Artificial nitrogen fixation technology Synthetic ammonia.
Topic 3: Soda ash production.
Unit 2: Chemistry and Resource Development and Utilization.
Issue 1: Access to clean water.
Topic 2: Comprehensive utilization of seawater.
Topic 3: Comprehensive utilization of oil, coal and natural gas.
Unit 3: Chemistry and Materials Development.
Topic 1: Inorganic non-metallic materials.
Topic 2: Metal Materials.
3. Polymer compounds and materials.
Unit 4: Chemistry and the Development of Technology.
Topic 1: Fertilizers and pesticides.
Topic 2: Surfactants and fine chemicals.
1.If you can, find time to do it.
2.If you don't have the conditions, try to understand why you're doing it. Why do you have to use the lower end to release the gas instead of pulling out the upper plug?
Because it is easy to spray the plug out by pulling the plug directly, it will not be deflated with the lower end. There's a reason for everything. Understand this reason, and you will never be mistaken.
Rote memorization is not always reliable.
3) Another ability tested in the lab questions is analytical ability. For example, there are often questions asking you to fill in the reagents in a certain bottle. Generally speaking, these reagents are mainly used to remove impurities, and at this time, you have to analyze what kind of impurities are removed?
Some topics call for the removal of CO2 and H2O in the air, that is, soda lime.
4) Some topics require the measurement of the volume of gas reacted by a certain liquid phase, and at this time, concentrated sulfuric acid is required to remove water vapor. Analysis is the core ability to do this kind of question. Another way to do this is to think about it from the perspective of the experimental designer.
If you're an experimental designer, why would you design it this way? If you're an experiment designer, where do you worry about errors? How do you prevent these errors?
5) After completing the questions, even if you are all right, you should analyze and think about the whole experiment, which is what I call "thinking more" in the text. You can think about what you would do if you were the one who wrote the question and gave you such an experiment. Then answer for yourself.
After all, I didn't take the test this time, and I might take the test next time. Everyone brushes the question, what you have to do is to make the most of the value of this question. If you brush one question and top others to brush three questions, of course you will improve more than others.
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Anonymous users2024-02-10Senior 2 Introduction] Knowledge points are the basic units of information transmission in online courses, and the study of the representation and association of knowledge points plays an important role in improving the learning and navigation of online courses. For all students, I have compiled the "Notes on the Three Knowledge Points of the Second Year Chemistry Elective State Draft", I hope it will be helpful to your learning!
1.Senior 2 Chemistry Elective 3 Knowledge Points Notes Part 1Heat of Reaction of Chemical Reaction (1) The Concept of Heat of Reaction:
When a chemical reaction is carried out at a certain temperature, the heat released or absorbed by the reaction is called the thermal effect of the reaction at this temperature, referred to as the heat of reaction. It is represented by the symbol Q.
2) The relationship between the heat of reaction and the endothermic reaction and the exothermic reaction.
Q>0, the reaction is endothermic; QE (4S), E (4D), E (4D>), E (5S), E (5D) > E (6S), E (6D) > E (7S), E (4F) > E (5P), E (4F) > E (6S) and other books. The energy relation of atomic orbitals is: ns
Or teaching objectives, the specific content of the lesson plan includes the following ten items. (2) Teaching a new lesson 1 Choose different teaching methods for different teaching contents, which include the following steps: 1. Topic (explain the name of the lesson) 2. Teaching purpose (or teaching requirements, concise generalization, and explain the tools used in auxiliary teaching methods) in the process of writing the lesson plan. >>>More
Material: Iron Series:
Pig iron: Fe-C alloy with a C content of more than 4% is characterized by being hard, also known as cast iron, and is the main component of manhole covers. >>>More
The density of the mixed gas is the same as that of N2 under the same t,p, that is, the average relative molecular weight of the mixed gas is the same as that of N2, which is 28, and the relative molecular weight of Co is 28, so it is sufficient to make the average relative molecular weight of CO2 and H2 28. Let n(CO2)=x, n(h2)=1-x >>>More
It is indeed difficult to calculate the unit cell, to have spatial three-dimensional thinking, geometric knowledge, you can summarize several unit cells together, such as face-centered cube, body-centered cube, etc., after summarizing together, find out the common points and differences, and compare them to learn, so that it will get twice the result with half the effort, I remember that there is a summary of this aspect on the textbook help, you can take a look at it specifically.
Elective 2. Chemical reaction. It refers to the process by which molecules are broken into atoms, and the atoms are rearranged and combined to form new molecules. It is often accompanied by luminescence and heat in the reaction. >>>More