High school must memorize chemical ion equations, high school chemical ion equations

18 places on the first floor can be rewritten as: CO2+2OH =CO32 +H2O, CO32-+H2O+CO2=2HCO3-;

Overdose actually occurs with 2 reactions; Excess reactions are generally synthesized by 2 reactions;

Also the "=" of some of your organic chemical reactions should be written as " ".

This is a personal understanding, and, personally, I don't think it is necessary to remember so much, as long as you master their laws, grasp the properties of the substances participating in the reaction, you can write them all, and remember a few common ones (the law is the relationship between acids, alkalis, salts, compounds, elementals, etc., to be precise, I am too lazy to say, this is summarized by myself, but also to say a word, if you want to learn chemistry well, do not rely on others, do not rely on teachers, rely on yourself, I wish you to learn chemistry well as soon as possible, and become a chemist in great China).

An ionic equation, i.e., a formula that represents an ionic reaction with the symbol of the ions that actually participate in the reaction.

Refers to the reaction in which soluble substances are detachable. The ionic equation not only represents a certain reaction between certain substances, but also represents the same type of ionic reaction.

For example, H++OH-=H2O can represent the neutralization of many strong acids and bases.

Whether a variety of ions can coexist in the same solution in large quantities can be summed up as: one color, two sexes, three special, and four reactions. To write an ionic equation, we must first determine whether the reaction is an ionic reaction regression.

For example, the reaction of acetic acid with sodium carbonate is an ionic reaction, and the reaction of acetic acid with ethanol to produce ethyl acetate and water is not an ionic reaction.

All high school chemistry equations and ion equations are as follows:

1.A small amount of CO2:2NaOH+CO2===Na2CO3+H20 is introduced into the sodium hydroxide solution

2. Under standard conditions, 1mol L100mL NaOH solution is introduced: CO2 + NaOH NaHCO3

3. In the caustic soda solution, the amount of sulfur dioxide is overly auspicious: NaOH+SO2==NaHSO3

4. Excess carbon dioxide is introduced into the clarified lime water: Ca(OH)2+2CO2=Ca(HCO3)2

5. A small amount of carbon dioxide is introduced into the water of ammonia: 2NH3?h2o+co2==(nh4)2co3+h2o

6. Absorb a small amount of sulfur dioxide with sodium carbonate solution: Na2CO3 + SO2Na2SO3 + CO27 carbon dioxide into sodium carbonate solution: Na2CO3 + CO2 + H2O = = 2NaHCO3

8. H2S gas is introduced into lead acetate [Pb(Ac)2] solution: Pb(Ac)2+H2S=PBS1+2HAC

9. A small amount of carbon dioxide is introduced into the sodium phenol solution: CO2 + H2O + C6H5OH + NaHCO310, and xenon iodide gas is introduced into the ferric chloride solution: 2Feci3 + 2Hi2Feci2 + I2 + 2HCI

1. NaHCO3 reacts with hydrochloric acid: HHCO3 CO2 H2O

2. NaHCO3 reacts with sodium hydroxide solution: HCO3 OH CO32 H2O

3. Add excess calcium bicarbonate solution to caustic soda solution: Ca2++HCO3 OH CaCO3 H2O

4. Add a small amount of calcium bicarbonate solution to the caustic soda solution: Ca2++2HCO3 2OH CAC3 H2O+CO32

5. Mix clarified lime water with a small amount of baking soda solution: Ca2 OH stuffy HCO3 CAC3 H2O

6. Mix the clarified lime water with the excess NaHCO3 solution: Ca2 2OH- 2HCO3-=CaCO3 2H2O+CO32-

7. Excessive carbon dioxide clo CO2 + H2O=HCO3 HCo is introduced into the calcium hypochlorite solution of the hood car

Ionic equation: The formula that represents an ionic reaction with the symbol of the ions that actually participate in the reaction.