Experimental association method
From vivid intuition to abstract thinking, the loyalty and basic description of chemical experiments of chemical equations, that is, experimental summary and generalization. Therefore, the chemical reaction equations related to chemical experiments are the most effective. For example, under the conditions of heating and using catalyst (MnO 2), KClO3 is decomposed to prepare oxygen. As long as we pay attention to the experimental scene, it will promote the understanding and memory of this chemical reaction equation by connecting the experiment of mixing white crystal and black powder to produce oxygen.
Reaction law method
Chemical reactions are not irregular. The laws of recombination, decomposition, substitution, decomposition, etc. are familiar to everyone, and then they are emphasized-reducing oxidation through reaction. For example, FECL3 _ 3 _ 3 is a strong oxidant, while Cu is an excessively weak reductant. According to the principle that redox reaction always occurs between strong oxidant and strong reductant, both of them can react.
Exponential method
The indexing method is to fill queues, queues and special cards according to the equation or the equation of response research to form a publicity system. These cards are reproduced with zero rest time and leave a deep impression on the cerebral cortex.
Grouping method
The index can summarize the whole and the group can highlight the part, which is a targeted form of expression. The two complement each other and have the same intention.
For example, a set of equations for aluminum components:
ALCL3 + 3NH3？ H2O = Al(OH)3↓+3n H4 cl；
al2o 3+2 NaOH = 2 NAA lo 2+H2O；
2Al+2 NaOH+2H2O = 2 NAA lo 2+3 H2↑；
al(OH)3+NaOH = NAA lo 2+2H2O；
al2s 3+6H2O = 3H2S ↑+ 2AL(OH)3‰；
2AL 3 ++ 3co 32-+3H2O = 2AL(OH)3 \u+ 3co 2；
2lo 2-+CO2+3H2O = 2AL(OH)3 \u+ CO32-；
Formula method
In order to separate chemical equations, sometimes according to the characteristics of chemical equations, some form of easy-to-store statements can be added, which is the characteristics of chemical equations and is called this method. al2o 3+2 NaOH = 2 NAA lo 2+H2O； This reaction is: alkaline water, sodium. The further evolution of oral decision method is a specific sparse coding method, and "38342" is the coding of this reaction.