Which substances are weak bases, which bases are strong bases, and which bases are weak bases?

According to the different classifications in chemistry, there can be many.

Broncester's acid-base theory says that if you can get protons (i.e., H ions) is a base, then a base with a weak ability to obtain protons is a weak base, such as NH3, H2O, OH roots combined with heavy metal cations, etc.;

According to Lewis acid-base theory, a substance that can wait for electrons is a base, and a substance that is not strong in electrons is a weak base, such as AlCl3.

Don't remember too much weak alkali.

The four strong bases in secondary school: naoh koh ca(oh)2 ba(oh)2 Remember the strong bases, and the rest are weak bases (that is, they may be encountered).

Generally speaking, substances that can neutralize with acids, but do not ionize hydroxide ions, can be defined as weak bases. Lewis bases in a more generalized sense include more substances than this one.

Ammonia, copper hydroxide, ferrous hydroxide, iron hydroxide.

In middle school chemistry, all bases other than the four strong bases: Naoh Koh Ca(OH)2 Ba(OH)2 can be considered as weak bases.

Weak bases occur incomplete ionization in aqueous solutions. Weak alkalis are composed of hydroxide ions and metal ions, and weak alkali metals are weaker in reducing than magnesium. Because magnesium hydroxide is a medium-strong base. For example: Cu(OH)2

naoh koh ca(oh)2 ba(oh)2 remember the strong base, and the rest are weak bases (that is, they may be encountered).

The "strong and weak bases" at the high school level are as follows:

1. The main "strong and weak alkalis" in high school are:

Strong alkali: lithium hydroxide [LiOH], sodium hydroxide.

Caustic soda, NaOH], potassium hydroxide [KOH], rubidium hydroxide [RBOH], cesium hydroxide [CSOH], hydrated lime [calcium hydroxide, Ca(OH)2], strontium hydroxide [SR(OH)2], barium hydroxide [BA(OH)2], mercury hydroxide [HG(OH)2], thallium hydroxide [TLOH], thallium hydroxide [TLOH3], silver ammonia hydroxide [AGOH·2NH3], choline [HOCH2CH2N(CH3)3( oh)]；

Weak bases: Mg(OH)2, Al(OH)3, Zn(OH)2, Fe(OH)3, Fe(OH)2, Cu(OH)2,;

2. What is a strong base and a weak base.

Strong base: Usually refers to a substance whose solution can discolor a specific indicator (e.g., making a purple litmus solution blue, making a colorless phenolphthalein).

solution turns red, etc.), in the standard case (concentration is, pH.

Greater than 7. Anions ionized in an aqueous solution.

All are hydroxide ions that react with acids to form salts and water. The so-called strong alkali and weak alkali are relatively speaking, the alkali can be completely ionized when dissolved in water, and it belongs to the strong alkali. Alkali metal.

The alkali corresponding to some alkaline earth metals is generally a strong alkali.

2.Weak base: A weak base is a base that is not completely ionized after being dissolved in water. Weak bases are not necessarily insoluble in water (of course, they are generally insoluble bases), such as NH3·H2O

It is easily soluble in water, but due to incomplete ionization in water, NH3·H2O is a weak base. Alkalis that cannot be completely ionized are generally formed from inactive metals (or NH3), such as: Al(Oh)3, Cu(Oh)2, Fe(Oh)2, Fe(Oh)3, ZN(Oh)2 and other insoluble bases.

1. Ammonia: refers to the aqueous solution of ammonia, which has a strong pungent odor and is weakly alkaline. Ammonia is a commonly used ammonia in the laboratory, which can react with solutions containing copper ions to form dark blue complexes, and can also be used to configure analytical chemical reagents such as silver ammonia solutions; Sodium carbonate:

Also known as soda ash, also known as soda or soda ash in the world, is a kind of white powder that is easily soluble in water, the solution is alkaline, can be decomposed at high temperature, and does not decompose when heated, and is an important organic chemical raw material, mainly used in the production of flat glass, glass products and ceramic glaze.

2. Sodium bicarbonate: commonly known as baking soda, baking soda, heavy cao, is a white fine crystal, the solubility in water is less than sodium carbonate, is an industrial chemical, may be toxic, the solid begins to gradually decompose above 50 degrees Celsius to produce sodium carbonate, carbon dioxide and water, 440 degrees Celsius completely decomposed. It is an acid salt formed after the neutralization of strong alkali and weak acid, which is weakly alkaline when dissolved in water, and can be used as a leavening agent in the food production process.

1. Ammonia: refers to the aqueous solution of ammonia, which has a strong pungent odor and is weakly alkaline. Ammonia is a commonly used ammonia in the laboratory, which can react with solutions containing copper ions to form dark blue complexes, and can also be used to configure analytical chemical reagents such as silver ammonia solutions; Sodium carbonate:

Also known as soda ash, also known as soda or soda ash in the world, is a kind of soluble white powder in water, the solution is alkaline, high temperature Kaizheng Li can decompose, heating does not decompose, is an important organic chemical raw material, mainly used in the production of flat glass, glass products and ceramic glaze.

2. Sodium bicarbonate: commonly known as baking soda, baking soda, heavy cao, is a white fine crystal, the solubility in water is less than sodium carbonate, is an industrial chemical, may be toxic, the solid begins to gradually decompose above 50 degrees Celsius to produce sodium carbonate, carbon dioxide and water, 440 degrees Celsius completely decomposed. It is an acid salt formed after the neutralization of strong alkali and weak acid, which is weakly alkaline when dissolved in water, and can be used as a leavening agent for food production process.

A weak base is a base that is not completely ionized when dissolved in water. Common weak bases are silver hunger: Al(OH)3 aluminum hydroxide. cu(oh)2

Copper hydroxide, Fe(OH)2

Ferrous hydroxide, Fe(OH)3

Iron hydroxide, Zn(OH)2

Zinc hydroxide, etc.

A weak base is a base that is incompletely ionized in an aqueous solution, which means that the protonation reaction is incomplete. The pH value of a general base.

The range is 7 14, where 7 is neutral and 14 is strongly alkaline, and the weak alkali is from the water molecule relative to the strong alkali.

The ability to accept protons is poor, resulting in a higher concentration of H+ in the solution and a lower pH.

A strong base is an anion ionized in an aqueous solution.

It is a substance that is all hydroxide ions. The strong alkali reacts with the acid to form salt and water. The so-called strong alkali and weak alkali are relatively speaking, the alkali dissolves in water and can completely ionize the hail return, which belongs to the strong alkali. Common strong bases are Lioh lithium hydroxide and KOH potassium hydroxide.

Ca(OH) calcium hydroxide.

Ba(OH) barium hydroxide, etc.

What are the weak acids and bases, as follows:

1. Hydrochloric acid, sulfuric acid and nitric acid are strong acids, and sodium bicarbonate and calcium bicarbonate are weak bases;

2. Acid refers to the cations ionized in the aqueous solution are all hydrogen ion compounds, the so-called strong acid, weak acid is relatively speaking, acid dissolved in water can be completely ionized, belongs to strong acids such as HCL, H2SO4, HNO3, HBR, HI, etc., acid soluble in water can not be completely ionized, belongs to weak acids such as carbonic acid, H2S, HCN, HF, phosphoric acid, methyl nucleic acid, acetic acid, etc.;

3. Alkali refers to the ionization of anions in aqueous solution are all hydroxide ion compounds, the so-called strong alkali, Bi Pa Liang weak alkali is relatively speaking, alkali dissolved in water can be completely ionized, belongs to strong alkali such as KOH, Naoh, CSOH, etc., the alkali corresponding to the active metal is generally a strong alkali, alkali dissolved in water can not be completely ionized, belongs to a weak alkali, such as monohydrate and ammonia, calcium hydroxide, hydroxide aluminum, zinc hydroxide, etc.