The content of the first unit of Physical Chemistry in the first year of high school

Chemistry is redox and ionic reactions are the focus, I just finished my first year of high school this year, and I will be my second year of high school in September. Chemical redox may seem difficult, but if you study it carefully, you can do it in 2 afternoons. But ionic reaction is different, ionic reaction is very simple to learn, but it must be mastered very solidly, otherwise many of the later content will be difficult to learn, such as the reversible reaction in compulsory 2, and the metal and non-metal in compulsory 1, all of which must be understood by ionic reaction, and many of my classmates do not understand it well.

In the case of physics in the first year of high school, compulsory 1 is not interesting, memorize the formula, Niu Er must study hard, and the force analysis will be applied in all questions in the future. I didn't study well in compulsory 1, and it's nothing, but I still did well after completing compulsory 2

ps: It's normal to learn hard in high school physics at the beginning, and it's normal to fail exams, so be prepared. Chemistry is very simple, and it depends on this pull.

Chapter 1: 1Redox reactions.

2. Ionic reaction.

3. Energy changes in chemical reactions.

In general, the first chapter of chemistry is difficult and requires careful memorization and understanding. This chapter is also important for later study.

High school physics starts with mechanics, and the difficulty rises. If it's more difficult.

I think physics, mathematics, chemistry.

Physics: Force. Chemistry: Redox reactions.

High school science (especially physics) and mathematics are difficult to learn! (See for yourself).

Physics is more difficult to learn.

Both barium and silver precipitate sulfate, copper and silver precipitate hydroxide, and silver precipitates chloride ions.

Therefore, hydrochloric acid should be added first, otherwise it will not be possible to precipitate one by one.

The order of the next two solutions is actually interchangeable. Pick B

The answer is reason B: hydrochloric acid is added first to remove silver ions, then potassium sulfate is added to remove barium ions, and sodium hydroxide is added to remove copper ions.

Chapter 1: The Moore Problem! This unit is useful.

Chapter 2 Memorize the equation.

Chapter 3 Organic Chemistry There is a more detailed introduction to organic chemistry in the second year of high school, if you are a high school student, you should send a book.

We sent it three years at a time.

Oxygen (oxygen is capable of rekindling a strip of wood with sparks).

The chemical reaction between sodium peroxide and water releases heat, which causes the air in the suction filter bottle to be heated and expanded, and the gas is everywhere through the catheter, and bubbles are seen.

1.Basis: If there is no element C in the material elements participating in the reaction, then there will be no substance containing element C in the product.

3. 2na2o2 + 2h2o === 4naoh + o2

1, oxygen, 2, there is heat released during the reaction, so that the air in the suction filter bottle is heated and expanded 1, the type of elements before and after the chemical reaction remains unchanged, and the reactants do not contain carbon elements, 2, Naoh, 3, 2H2O2 = MNO2 = 2H2O + O2 gas.

Chapter 1 Description of Movement.

First, the main knowledge.

1.Time & Moment.

2.Reference system, coordinate system.

3.Particle. 4.Displacement and distance.

5.Speed, Rate, (including instantaneous velocity, instantaneous rate, average velocity, average velocity) 6Acceleration.

7.Displacement – a temporal image.

8.Speed – Temporal image.

9.Experiment: Speed measurement with a dot timer.

Second, the main ideas and methods.

1.Scientific Abstraction – Model Building Ideas.

2.Limit thinking.

3.Combining mathematics and science.