How can high three chemistry be efficient back to the equation

Do more questions, see more equations, and naturally it will be. If you have to memorize it, copy it from the book yourself, after all, you can have a little impression when you copy it yourself, there are a lot of pamphlets sold outside, but it is not necessarily of much use to buy them.

Redox is a clue, according to the electrons of the elements of each main group, sketch the network diagram by yourself, and then write the equation under the network, you will basically understand and memorize it. In fact, there are not a few equations involved in each element, take it easy, understand him, come on!

Instead of just memorizing equations, it is better to understand the types and characteristics of various reactions, as well as the coexistence of ions, which is very helpful for you and the chemical equations. Chemistry is nothing more than the regular reaction of matter, and once you understand the basics, you can quickly write the equations of two or more substances.

Understand and memorize, it is not enough to simply memorize, write more, as the saying goes, it is better to write by hand than to see it.

Don't memorize, see the products and reactants clearly, look at the reaction environment, how the reactants can be reconstituted into products, what is the principle, understand these, take them out from time to time, and remember.

On the basis of understanding, draw inferences from one another, and draw from one to the other. Chemical equations are not rote memorization.

It's the third year of high school, it's not the time for the backrest to be solved, the chemical equation is the abbreviation of the chemical structure change, you have to be familiar with the laws of their chemical change, a single back is useless.

Let's just talk about redox reactions. List a table of compounds in each valence state of an element, such as N2, N2O, NO2, NO2, HNO3, etc. The transformation between each of the two compounds is then analyzed.

Organize them together, use the scattered time to read, watch them whenever you have time, and make it a habit to imprint it in your heart.

Look more, use the right method, and find the similarities of the formula.

For exercises, science is different from liberal arts, not a simple memorization, but a skillful memorization.

The key is to understand, and when you really understand, you will remember.

It is still necessary to understand the principles of chemical reactions in order to help with memory.

The equation is not memorized, even if you are only in the third year of junior high school, let alone your third year of high school.

1. Experimental linkage.

From vivid and intuitive to abstract thinking, chemical equations are faithful and essential descriptions of chemical experiments, and are generalizations and summaries of experiments. Therefore, it is most effective to memorize the relevant chemical reaction equations based on chemical experiments.

For example, under the condition of heating and using a catalyst (MNO2), the decomposition of KCLO3 is used to produce oxygen. As long as we pay attention to the experimental situation, we can associate the experimental fact that white crystals are mixed with black powder and heated to produce oxygen, which will promote the understanding and memory of this chemical reaction equation.

2. Reaction law method.

Chemical reactions are not random. The reaction laws of compounding, decomposition, displacement and metathesis are more familiar to everyone, and here we will emphasize the laws of oxidation-reduction reactions.

For example, FeCl3 is a strong oxidant, Cu is not too weak reducing agent, according to the principle that the oxidation-reduction reaction always occurs first between the stronger oxidant and the stronger reducing agent, so the two can react: 2FeCl3 Cu=CuCl2 2FeCl2 and in contrast, CuCl2 and FeCl2 are weaker oxidants and reducing agents, so they cannot react with each other.

3. Memory according to the classification of substances.

The key to mastering this type of method is to be proficient in the concepts of acids, bases, salts and oxides. Substances of the same kind generally have similar properties, and remembering one equation is also remembering a class of equations.

For example, CO2 can react with NaOH: CO2 + 2NaOH = Na2CO3 + H2O, we can not only see it as an equation for this equation, but also look at it from the perspective of classification, where CO2 belongs to acidic oxides, NaOH belongs to alkalis, and this equation represents a class of equations, namely: acidic oxides + alkalis = salt + water.

4. "Characteristic response" memory method.

For organic chemical reaction equations, it is advisable to use the characteristic reaction memory method. The basic types of organic chemical reactions include: substitution reaction, addition reaction, polyaddition reaction, elimination reaction, esterification reaction, polycondensation reaction, etc.