What do you think about strong acids and weak alkali salts in high school chemistry? 40

Strong acids and alkalis refer to those that can be completely ionized in aqueous solutions, such as sulfate hydrochloric acid, sodium hydroxide, and calcium hydroxide (although calcium hydroxide is slightly soluble in water, it is completely ionized). Weak acids and weak bases are the opposite. Strong acid and strong alkali salt are the neutralization products of strong acid and strong base, and so on.

Strong acid and strong alkali salt are neutral, strong acid and weak alkali salt are acidic because they will be hydrolyzed, strong alkali and weak salt are alkaline, weak acid and weak alkaline salt depends on whose acidity or alkaline strength is strong, acidity wants to be strong acidic, and relatively strong alkaline is alkaline. The hydrolysis process is shown in the figure, and the handwritten words are ugly.

Strong acid and strong alkali salt: generally neutral (pH = 7) (such as: NaCl KNO3) but for fluoroborate such as sodium fluoroborate, its corresponding fluoroboric acid is a strong acid, which belongs to a strong acid and strong alkali salt, but sodium fluoroborate partially releases HF because of the reaction of the fluoroborate part with water to form hydroxyfluoroboric acid, so its aqueous solution pH is about 2 4, showing strong acidity.

Strong acid and weak alkali salt: acidic (pH<7) (such as: NH4Cl CuSO4) weak acid and strong alkali salt:

Basic (pH>7) (e.g., Na2CO3 NAHCo3).

Strong acids are only HCl H2SO4 and HNO3, other acids are weak acids, strong bases have NaOH KOH Ca(OH)2 BA(OH)2 and so on, there are many soluble salts, which are soluble in water, like CaCO3 BaSO4 those insoluble are not. In addition, strong acids, strong bases, soluble salts, when writing ion equations, must be disassembled into ionic form! ～

Inorganic experiments are basically characteristic reactions, and there are obvious phenomena. Organic experiments, this is relatively simple, focusing on the understanding of the principle of reaction, the questions are all the same, and remember the basic color of each gas, such as na yellow, reaction naoh is pale yellow, na2oh2 is white, various colors after the reaction must be entered, there are 2 corollary questions, basically starting from this, useful to you, hope

Strong acid and weak alkali salt, acidic, strong alkali weak salt alkaline, strong acid and strong alkali salt neutral, weak acid and weak alkali salt, see which is stronger.

In short, whoever is strong shows who is sexual, and the strength is equal and neutral.

Memorize by yourself which are strong acids and strong bases, weak acids and weak bases, and see what type of acids and bases are composed of compounds, which are what acids and alkali salts are composed of.

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 alkalis: 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 [TL OH3], 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 that can change the color of a specific indicator (such as turning a purple litmus solution, turning a colorless phenolphthalein solution red, etc.), under standard conditions (concentration, pH value greater than 7. The anions ionized in the aqueous solution are all hydroxide ions, which 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. The alkali metal and some alkaline earth metals correspond to a strong alkali metal.

2.Weak base: A weak base is a base that is not completely ionized after being dissolved in water.

Weak alkali is not necessarily insoluble in water (of course, it is generally insoluble alkali), for example, NH3·H2O is very soluble in water, but because it is not completely ionized 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.

The acidity of various acids in secondary school is ranked in order (from strong to weak):

HClT (perchloric acid)> HI (hydroiodic acid)> HBR (hydrobromic acid)> HCl (hydrochloric acid)> Hso (sulfuric acid)> HNO (nitric acid)> HClo (chloric acid) (the above are strong acids).

> H C O (oxalic acid), > H so (sulfurous acid), > H po (phosphoric acid), > ch Cocooh (pyruvate), > HNO (nitrite acid), > HF (hydrofluoric acid), > HCOOH (formic acid), > (the above are moderately strong acids).

C H O (lactic acid) > C H Cooh (benzoic acid) > ch = CH-COOH (acrylic acid) > ch COOH (acetic acid) > C H COOH (propionic acid) > C H Cooh (oleic acid) > C H Cooh (stearic acid) > H O·Co (i.e. HCO) (carbonated) > H S (hydrosulfuric acid) > HCO (hypochlorous acid) > HCO (boric acid) > H Sio (metasilicic acid) > C h OH (phenol).

The alkalinity of various alkalis in secondary school is ranked in order (from strong to weak):

CSoH>rboH>KOH>NaOH>BA(OH) >LiOh>SR(OH) >Ca(OH) (all of the above are strong bases).

> mg(OH) >agoh (equivalent to AGO suspension) (the above is a medium-strong base).

> nh ·h o(nh oh)> fe(oh) >cu(oh) >fe(oh) >al(oh) (distinctly amphoteric, very weakly alkaline).

What are the common strong acids and strong bases in high schools, and what are the weak acids and weak bases of salt.

Hello, I am happy to answer for you, 1. Strong acids: hydrochloric acid, sulfuric acid, nitric acid, perchloric acid, hydrobromic acid, hydroiodic acid, etc. 2. Strong alkali: potassium hydroxide, sodium hydroxide, calcium hydroxide, barium hydroxide, etc. Hope it helps.

Sodium hydroxide: white or translucent crystal (depending on the purity) and soluble in water and emit a lot of heat, soluble in ethanol, easy to deliquescent and absorb carbon dioxide, the solution is strongly alkaline, strongly corrosive, can corrode paper, wood products, cotton, cyanide, etc. Used in pharmaceuticals, laboratories are used to decompose acidic or aluminosilicate samples, metal ion precipitators, acid-base regulators, acid gas absorbents, desiccant, etc.

Store tightly sealed in a polyethylene bottle.

Calcium hydroxide: white and light powder, slightly soluble in water and ethanol, easy to absorb moisture and carbon dioxide. The laboratory is used in acid gas absorbers, desiccant, neutralizers, metal ion precipitants and other industries for building materials, chemical raw materials, and also used in the pharmaceutical industry.

Keep glass bottles tightly closed.

Sodium chloride: colorless powdery crystal, soluble in water, insoluble in ethanol, pure and non-hygroscopic. It is widely used in food processing and condiments and feed industry, industrially used in pharmaceutical industry, chlor-alkali industry, chemical raw materials, etc., and used in chemical analysis (quantitative analysis reagent of silver or as a reference reagent) to prepare hydrochloric acid.

Copper sulfate: 5 water and matter is a beautiful dark blue crystal, anhydrous matter is white absorbent powder, soluble in water, insoluble in ethanol, toxic. It is mainly used in feed industry, pesticide, copper smelting, chemical industry, laboratory for desiccant (anhydrous), carbon monoxide absorber, aldehyde oxidation or identification reagent, etc.

Strong acids and alkali salts such as: sodium chloride, sodium sulfate, potassium nitrate 2 Weak acids and weak alkali salts are salts formed by the reaction of weak acids and weak bases, such as: ammonium carbonate, ammonium acetate, copper sulfide.

Weak acid ions: carbonate ion CO3 2-, sulfite ion SO3 2-, hydrosulfate ion HS-, silicate SIO3 2-, metaaluminate ALO2-, acetate CH3COO- weak base ion: alkali that is insoluble in water, such as Fe(OH)3, Cu(OH)2, NH3·H2O (ammonia) 3 Strong alkali weak salt is a salt generated by the reaction of strong alkali and weak acid Dissolved water is alkaline, such as sodium carbonate, sodium acetate Weak acid ion:

Such as carbonate ions CO3 2-, sulfite ions SO3 2-, hydrosulfate ions S2-, silicate SiO3 2-, metaaluminate ALO2-, acetate CH3COO-, etc. Strong base ions: such as Na+, K+, Ca2+, Ba2+, etc. 4 Strong acid and weak alkali salt are salts generated by the reaction of strong acid and weak base, and the solution is acidic For example: copper sulfate, iron chloride, ammonium chloride Strong acid ions:

Six inorganic strong acids in chemistry Sulfuric acid, nitric acid, hydrochloric acid (hydrochloric acid), hydroiodic acid, hydrobromic acid, perchloric acid Weak base ions: NH3·H2O (ammonia) Alkalis that are insoluble in water, such as Fe(OH)3, Cu(OH)2, Mg(OH)2, Al(OH)3 5 Weak alkalis are insoluble in water and cannot be completely ionized, generally belonging to bases formed by inactive metals, such as NH3·H2O, Al(OH)3, Cu(OH)2, Fe(OH)2, Fe(OH)3, Zn(OH)2 and other insoluble bases6 The strong alkali that is common in this paragraph:

Alkali metal hydroxides: caustic soda [sodium hydroxide, Naoh] Potassium hydroxide [KOH] Lithium hydroxide [LiOH] Alkaline earth metal hydroxide Hydrated lime [calcium hydroxide, Ca(OH)2] Barium hydroxide [Ba(OH)2] 7 Common weak acids in middle school chemistry are: H2CO3 (carbonic acid), H2SO3 (sulfurous acid), HF (hydrofluoric acid, rare), CH3COOH (also known as C2H4O2 acetic acid, also known as acetic acid), H2S (hydrosulfuric acid), HCO (hypochlorous acid), HNO2 (nitrous acid, less common), all organic acids in the middle school range (organic strong acids are not studied in secondary schools) 8 Inorganic strong acids:

Sulfuric acid (H2SO4), nitric acid (HNO3), perchloric acid (HCO4), hydrochloric acid (HCl), hydrobromic acid (HBR), hydroiodic acid (HI), perbronic acid (HBRO4), chloric acid (HCO3), bromine acid (HBRO3).

Strong acids: sulfuric acid, hydrochloric acid, nitric acid, hydrobromic acid, hydroiodic acid, perchloric acid, strong acids: phosphoric acid, sulfurous acid, (there is a bit at the bottom that says HF, hydrofluoric acid is a weak acid) strong alkali:

Sodium hydroxide, potassium hydroxide, barium hydroxide, calcium hydroxide solution (it is wrong to say calcium hydroxide alone, because only calcium hydroxide soluble in water is strongly alkaline, and calcium hydroxide is slightly soluble in water).

Soluble salts: can only be illustrated, too many, (nitrate salts are soluble), NaCl, Feso4, Cuso4, MgSo4 (carbonate is only soluble in Na, K, ammonium, etc.).

Hello....In high school chemistry, strong acids are HCl, H2SO4, HNO3, HBR, HCO4, Hi, strong alkalis Koh, Naoh, Ba(OH)2, Ca(OH)2 of which calcium hydroxide is slightly soluble in water. Soluble salts, the vast majority of them are soluble salts, you remember the insoluble salts, barium ions and sulfate, carbonate will form insoluble salts, calcium ions and carbonate will be formed, aluminum ions will form insoluble salts when they meet halogens, halogens such as: i br cl.