What are the examples of chemical reactions, chemical reactions?

Bases & Acidic Oxides:

Sodium hydroxide reacts with sulfur dioxide to produce sodium sulfite and water.

2naoh+so2=na2so3+h2o

Sodium hydroxide reacts with carbon dioxide to produce sodium carbonate and water.

2naoh+co2=na2co3+h2o

Basic oxides vs. acidic oxides.

Calcium oxide reacts with carbon dioxide to form calcium carbonate.

cao+co2=caco3

Calcium oxide reacts with sulfur dioxide to form calcium sulfite.

cao+so2=caso3

Acids and metals. Hydrochloric acid reacts with iron to form ferrous sulfate and hydrogen.

2hcl+fe=fecl2+h2

Sulfuric acid reacts with magnesium to produce magnesium sulfate and hydrogen.

h2so4+mg=mgso4+h2

Acid-base neutralization. Sulfuric acid reacts with sodium hydroxide to produce sodium sulfate and water.

H2SO4 + 2NaOH = Na2SO4 + 2H2O hydrochloric acid reacts with sodium hydroxide to form sodium chloride and water.

hcl+naoh=nacl+h2o

Acids and salts. Hydrochloric acid reacts with barium sulfate to form sulfuric acid and barium chloride precipitates.

2HCl+Ba2SO4=H2SO4+2BaCl sulfuric acid reacts with silver nitrate to form nitric acid and silver sulfate precipitate.

h2so4+2agno3=2hno3+ag2so4

Alkalis and acidic oxides: sodium hydroxide reacts with carbon dioxide; Sodium hydroxide reacts with sulfur dioxide.

Basic and acidic oxides: sodium oxide and carbon dioxide; Potassium oxide reacts with carbon dioxide.

Acids and metals: magnesium, aluminum, zinc, iron, etc. react with hydrochloric acid.

Acid-base neutralization: acid, dilute sulfuric acid, hydrochloric acid, etc.; Alkali, sodium hydroxide, potassium hydroxide, etc. can all react.

Acids and salts: hydrochloric acid with calcium carbonate, silver nitrate.

Examples of chemical reactions

1. Chemical reaction is a class of chemical reactions.

A general term (usually an inorganic reaction) that refers to the chemical reaction of two or more reactants to produce a single product. For example, the combustion of hydrogen and oxygen to produce water is a chemical reaction. Usually the chemical reaction is an exothermic reaction.

2mg+o2→2mgo，2h2+o2→2h2o，c(s) +o2(g)→co2(g)。

2. Decomposition reaction.

decomposition reaction), which is one of the common types of chemical reactions. It refers to the reaction in which a compound is broken down into two or more elements or compounds under specific conditions.

Conceptual analysis. 1. Metal + oxygen metal oxide.

Many metals can be directly combined with oxygen. For example, when the common metal aluminum comes into contact with air, its surface can immediately form a dense oxide film (aluminum oxide, which can prevent the inner layer of aluminum from continuing to be detected by oxygen ants. 【4al+3o2===2al2o3】

2. Non-metal + oxygen Non-metal oxide: After ignition, many non-metals can be burned in oxygen. For example: igniting the carbon rod (full combustion) [c+O2== igniting and destroying socks ==CO2] (Note: insufficient combustion is also a chemical reaction, equation.

2c+o2==ignition==2co])

Common chemical reactions: synthesis, cellular respiration, combustion, rusting, batteries, etc.

1. Photosynthesis: Photosynthesis usually refers to the process in which green plants (including algae) absorb light energy, turn carbon dioxide and water into energetic organic matter, and release oxygen at the same time. It mainly includes two stages: light reaction and dark reaction, which involve important reaction steps such as light absorption, electron transfer, photosynthetic phosphorylation, and carbon assimilation, which is of great significance for realizing the energy conversion in nature and maintaining the carbon-oxygen balance of the atmosphere.

2. Cellular respiration: Cellular respiration refers to the process of organic matter undergoing a series of oxidative decomposition in cells to generate carbon dioxide or other products, release energy and generate ATP. Within a certain range, the intensity of cellular respiration increases with the increase of water content and decreases with the decrease of water content.

3. Combustion: Combustion is a kind of exothermic and luminescent chemical reaction, the reaction process is extremely complex, the chain reaction of free radicals is the essence of the combustion state mining reaction, and light and heat are the physical phenomena that occur during the combustion process.

4. Rust: Rust is a chemical reaction, which is essentially an oxidation reaction of metals. The most common phenomenon of rust is that iron products are oxidized by long-term exposure to air and oxygen, or are eroded by oxygen in water to become oxides.

5. Battery: The battery uses electrochemical or redox reactions to convert chemical energy into electrical energy. The spontaneous redox reaction occurs in the galvanic cell, while the non-spontaneous chemical reaction occurs in the electric sail Sakura nuclear decomposer.

1. Different definitions:

1) Chemical change refers to the process of the conversion or transfer of atoms or electrons between molecules in contact with each other to form new molecules accompanied by energy changes, which is essentially the breaking of old bonds and the formation of new bonds.

2) Chemical reaction refers to the process by which molecules are broken into atoms, and the atoms are rearranged and combined to form new molecules, which is called a chemical reaction. In the reaction, it is often accompanied by luminescence, heat, discoloration, formation of precipitate, etc., and the basis for judging whether a reaction is a chemical reaction is whether the reaction generates new molecules.

2. Different classifications:

1) Chemical changes are divided into four basic types of reactions: chemical reactions, decomposition reactions, displacement reactions, and metathesis reactions.

2) Chemical reactions: redox reactions, non-redox reactions; Autoredox, the reducing agent reacts with the oxidant.

For example, if rusted iron filings are put into sulfuric acid, there will be two chemical reactions:

1) Fe + H2SO4 = FeSO4 + H2 (gas).

2）fe2o3+h2so4=feso4+h2o

We can say that the rusted iron filings are chemically changed when they are put into sulfuric acid, and it has two chemical reactions.

Personally, I think that chemical changes may involve a lot of chemical reactions. And when we're learning, usually a complex chemical change, we'll simplify it into one or two more important or simple chemical reactions. For example, iron rust is actually a more complex chemical change, but when we learn, as long as we know the iron and oxygen in it to form iron oxide, we learn a little more later, and know that it reacts with water and its impurities to form galvanic cells.

It doesn't make a difference, chemical change is also called chemical reaction.

Ca(OH)2+CO2=CaCO3 +H2O The neutralization reaction of the clarified lime water and carbon dioxide is generated, and the lime water becomes turbid.

NaOH + HCl = NaCl + HCO Sodium hydroxide (commonly known as caustic soda, caustic soda, caustic soda) can be neutralized with hydrochloric acid to form sodium chloride and water.

2NaOH + H So = Na So + 2Ho Sodium hydroxide can neutralize with sulfuric acid to form sodium sulfate and water.

NaOH + HNoT = Nano + HO Sodium hydroxide can neutralize with nitric acid to produce sodium nitrate and water.

Ca(OH) +2HCl=CaCl +2HO Calcium hydroxide can be neutralized with hydrochloric acid to generate calcium chloride and water, and the reaction releases a lot of heat.

Al(OH) +3HCl=ALCL +3HO Aluminum hydroxide can neutralize with hydrochloric acid to produce aluminum chloride and water, **The main ingredient of gastric medicine with excessive gastric acid is aluminum hydroxide.

Ba(OH) +2HCl=BACL +2HO Barium hydroxide and hydrochloric acid undergo a neutralization reaction to generate barium chloride and water.

Fe(OH) +3HCl=FeCl +3HO Iron hydroxide (Fe(OH)) is insoluble in water, but can also neutralize with hydrochloric acid to form ferric chloride and water. (Fe(OH)) dissolves and the solution turns yellow.

Decomposition reaction: It refers to the reaction in which a compound is decomposed into two or more simple elements or compounds under specific conditions (such as heating, direct current, catalyst, etc.).

Metathesis reaction: A reaction in which two compounds exchange components with each other to produce two other compounds.

Displacement reaction: A chemical reaction in which an element reacts with a compound to form another element and compound.

Chemical reaction: refers to the formation of a new substance from two or more substances.

Chemical reaction. Disproportionation reaction: The reaction process in which two different molecules are formed due to the transfer of atoms (clusters) between the same molecules under certain conditions.

Substitution reaction: refers to the reaction in which an organic compound is attacked by a certain type of reagent, causing a group (or atom) in the molecule to be replaced by this reagent.

Addition reaction: two atoms at the end of the reactant molecule bound by heavy bonds or conjugated unsaturated systems are bonded with groups or atoms provided by the reagent respectively in the reaction to obtain a saturated or relatively saturated addition product.

Esterification reaction: It is a reaction in which alcohol and carboxylic acid or oxygenated inorganic acid form ester and water.

Saponification reaction: a reaction in which esters (especially carboxylic esters) are hydrolyzed to form carboxylates and alcohols under the action of alkalis.

Sulfonation reaction: a reaction in which the hydrogen atom in the aromatic hydrocarbon compound such as benzene molecule is replaced by the sulfonic acid group (—SO3H) in the sulfuric acid molecule.

That's all for the common ones, as for those proprietary reactions in organic chemistry that contain English, there is no definition, if you are interested in reading the book on organic chemistry, I hope it can help you.

Chemical Reaction Limit 1, Concept: Chemical reaction limit is the maximum degree that can be achieved by studying reversible reactions. 2. Reversible reaction:

Under the same reaction conditions, a chemical reaction can be carried out in both the positive and reverse reaction directions. 3. Description: (1) Most reactions have a certain degree of reversibility.

A reaction is necessary for a reversible reaction: it takes place under the same reaction conditions. (2) When the reversible reaction is carried out to a certain extent under certain conditions, the positive reaction rate and the reverse reaction rate are equal, the concentration of reactants and products does not change, the amount of the substance generated per unit time is equal to the amount of the substance consumed, and the reaction reaches a state of chemical equilibrium.

3) Chemical equilibrium is a dynamic equilibrium. In the state of chemical equilibrium, the chemical reaction is still carried out, but the composition of the reaction mixture is consistent, and when the reaction conditions change, the original chemical equilibrium state is destroyed, and a new equilibrium is reached after some time.