Substances that are soluble in HNO3 and insoluble in HNO3

Substances soluble in Hno3: active metals such as Cu, Fe, and Zn.

hydroxides (precipitate), carbonates (precipitate), etc.

Substances that are insoluble in Hno3: silver halide (precipitation), sulfate (precipitation), sulfite (precipitation), some phosphates (precipitation), etc.

Encyclopedia is wrong. Many of the metals in the cycle are insoluble in dilute concentrated nitric acid, such as AG, PT, NB, TA, etc.

The cold concentrated nitric acid can passivate Fe and Al to form a dense oxide film to prevent further reactions.

In addition, Baso4, AgCl, AGBR, AGI, HGS, etc. are insoluble in water and dilute concentrated nitric acid. (Not all silver halides are precipitated, AGF is soluble in water.) After the formation of baso3 precipitation, it will be oxidized by dilute concentrated nitric acid to form insoluble baso4 precipitation.

Phosphate is mostly soluble in dilute nitric acid.

Non-reducing solid acid oxides and solid acids are insoluble in nitric acid, mainly SiO2, H4SiO4, H2SiO3, P4O10, etc.

Hehe, let me sum it up:

Look at the nature of nitric acid on the 1st floor, 2nd floor, 3rd floor, and then search on the Internet to see the 2nd floor, but if you are in high school.

Then you must remember these insoluble substances: agcl baso4 h4sio4 mainly this 3

precipitates, insoluble in high school chemistry.

You can also refer to the precipitation behind the 3rd floor, but the high school does not require it.

If I ask about the insolubles of the university, then I can't do anything, I can help you hehe.

Nitric acid is an important strong acid (three strong acids: hydrochloric acid, sulfuric acid, nitric acid), which is characterized by strong oxidizing and corrosive properties. With the exception of gold and platinum, all metals can be dissolved by it.

So something can't be dissolved. You know it all

The first floor was wrong, I remembered that aluminum and iron (I don't know which one, or both) could not be dissolved in cold nitric acid, because a dense oxide structure would form on the surface of the oxide to continue the reaction.

HCl soluble 1:400

NH3 is soluble 1:700

HBR is soluble and has a good reputation for HCL, which is smaller than HI

HI Soluble Great Zen segment in HBR

SO2 Soluble 1: or Crude 40

H2S soluble 1:

Cl2 is soluble 1:2

CO2 is soluble 1:1

O2 slightly soluble.

NO2 reaction.

No tolerate.

CO is insoluble.

Solution: Copper does not react with sulfur annihilating acid, but can provide hydrogen ions, nitric acid reacts with copper to generate copper nitrate, nitrate ions and hydrogen ions supplied by sulfuric acid can continue to react, the reaction ion equation is as follows, 3Cu + 2NO3- +8H+ =Cu2+ 2NO+ 4H2O

When the concentration ratio of nitrate ions to hydrogen ions is 1:4, the most dissolved copper is produced.

Let the amount of sulfuric acid be xmol and the amount of nitric acid be ymolx+y=

y:(2x+y)=1:4

x=y=3cu + 2no3- +8h+ =cu2+ 2no + 4h2oz

z = maximum molar copper dissolving.

HNO3 is a covalent compound.

Ionic compounds are compounds made up of cations and anions. When the genus (such as sodium, potassium, calcium, magnesium, etc.) and active non-metals (such as fluorine, chlorine, oxygen, sulfur, etc.) are combined with each other, the active metals lose electrons to form positively charged cations (such as Na+, K+, Ca2+, Mg2+, etc.), and the active non-metals obtain electrons to form negatively charged anions (such as F-, Cl-, O2-, S2-, etc.), and cations and anions form ionic compounds by electrostatic action. There are also cationic and oxygenate formed compounds that are ionic compounds.

Among the compounds composed of non-metals, with the exception of ammonium salts, most of them are valence barriers.

Categories: Education Academic Exams >> Gaokao.

Problem description: What are the ions present in NaHSO4 both in solution and in the molten state? 2+ Why?

Analysis: Na(+)H(+)SO4(2-) is present in the solution, and Na(+)HSO4(-) is present in the molten state

Therefore, the ions present in both are a,na(+).

Just note down the water to break the bonds in HSO4- and ionize the hydrogen, while in the molten state it can only separate the metal ions from the acid ions, and other high school levels are not required, thank you!

Answer]: A redox reaction occurs so that the solution is s2-

The concentration is greatly reduced, and the ion noise accumulation is smaller than the dissolution and dismantling product of the collision, so that the metal sulfide is dissolved, $3ag2

s+8hno3

3s↓+2no↑+4h2

o+6agno3

Hello, now I am here to answer the above questions for you. The relative molecular mass of HNO3, HNO3 I believe that many friends still don't know, now let's take a look! 1. Nitric acid nitric acid is a kind of nitric acid that has. <>

1. Nitric acidNitric acid is a strong acid with strong oxidation and corrosiveness, which belongs to the monologic inorganic strong acid, is one of the six major inorganic strong acids, and is also an important chemical raw material.

2. It can be used in industry to make fertilizers, pesticides, explosives, dyes, salts, etc.; In organic chemistry, the mixture of concentrated nitric acid and concentrated sulfuric acid is an important nitrification reagent, and its aqueous solution is commonly known as nitrate water or ammonia nitrogen water.

3. The hazard symbols are O (oxidizing agent) and C (corrosive).

4. The anhydride of nitric acid is nitrous pentoxide.

5. Expand the information of Li Peng: In the eighth century AD, the Arab alchemist Jabir ibn Hayyan discovered and prepared nitric acid when he was distilling saltpeter, which is the earliest record of nitric acid in human beings.

6. In 1905, a factory for the production of nitric acid by arc method appeared in Norway, which was the earliest attempt to industrialize nitric acid in history.

In Germany, a nitric acid plant with a daily production capacity of 3 tons was built with platinum mesh as a voltaic catalyst.

In the same year, the synthesis of ammonia came out, and the production of nitric acid by ammonia oxidation began to enter the industrial stage, and it is still the main method of producing nitric acid in the world.

Halogen atoms are commonly divided into chloride ions, bromine ions, iodine ions, among which the reducibility is enhanced in turn, nitric acid has strong oxidation, so in the halogen ion and nitric acid mixed solution, redox reaction will occur, the stronger the reduction, the more difficult to coexist, only chloride ions can coexist with nitric acid, because the oxidation of nitric acid is not enough to oxidize chloride ions into elemental matter! Hope, thank you!

If there is no H+, i.e. no3-, it can coexist with all metal ions. Because nitrates are easily soluble in water.

If there is H+, NO3-, i.e., HNO3, it cannot coexist with reducing ions. For example, Fe2+, I-, S2-, SO32-, etc.

Because Hno3 has strong oxidizing properties, it can oxidize Fe2+ to Fe3+, which is similar to other ions.

fe2+h+no3-

fe3+no↑h2o