Why can t H2SO4 dry NH3 and what reactions do they occur?

Either is right. There are various ions in the solution, there are H+, HSO4-, SO4 2-H2SO4 ionization H+ is ionized step by step.

You can understand that a small amount of NH3 occurs as NH3+H2SO4=NH4HSO4, while NH3 is 2NH3+H2SO4=(NH4)2SO4 when there is an excess of NH3

NH3 is an alkaline gas capable of reacting with acidic concentrated sulfuric acid.

NH3+H2SO4=NH4HSO4 Note: Concentrated H2SO4 cannot oxidize NH3!

nh3+h2so4=nh4hso4

The equation is correct, the second step of concentrated sulfuric acid is not easy to react.

The equation upstairs is wrong.

Be. 2nh3+h2so4=(nh4)2so4

Upstairs is not entirely right, according to the electrode potential concentrated H2SO4 can oxidize NH3, but the reaction is more complex, mainly acid-base neutralization (acid-base proton theory), but concentrated H2SO4 oxidizes NH3 to produce nitrogen.

NH3 + H2SO4 = NH4HSO4, the concentration of sulfuric acid is large, even if (NH4)2SO4 is generated, it will continue to react with sulfuric acid to form NH4HSO4, the principle should be the same as Na2CO3 and carbonic acid.

Reaction, because the regular is paraluminal: NH3 + H2O = NH4OH

2nh4oh+h2so4=(nh4)2so4+h2o

So lift the round shed: 2NH3+H2SO4=(NH4)2SO4 (ammonia sulfate).

Substances that can react with dilute sulfuric acid.

1.It can react with litmus and other indicators.

It can react with active metals such as zinc and iron.

3.Can with. Metal oxides.

reactions, such as cuo

4.It can react with alkalis, such as NaOH

5.Reacts with certain salts: such as bacl2, carbonates.

Substances that can react with concentrated sulfuric acid:

Reductive cu, H2S, S, etc.

NH3 is an alkaline gas capable of reacting with acidic concentrated sulfuric acid.

nh3+h2so4=nh4hso4

Note: Concentrated H2SO4 does not oxidize NH3!

H2S is reducible, and concentrated H2SO4 has strong oxidation and can oxidize it, and generally the two will react as follows

h2s+h2so4=2h2o+so2+s(s)

SO3 can be dissolved in concentrated H2SO4, and oleum is made by dissolving SO3 in concentrated H2SO4.

Why can SO2 be dried with concentrated sulfuric acid, although SO2 is strongly reducing and round, and concentrated sulfuric acid is strongly oxidizing, but there is no valency among them.

The S in SO2 is +4 valence, and the S in concentrated sulfuric acid is +6 valence, and it seems that S does not have +5 valence, so they can't react.

SO2 and SO3 are not dissolved in sulfurous acid, but are actually dissolved in water in sulfurous acid solution.

SO3 dissolves in water to generate a cavity for sulfuric acid, and SO2 dissolves in water to produce sulfurous acid, that [Fantasy 730] classmate don't mislead people.

In order to carry out the redox reaction, the apparent phenomenon is the increase and decrease of the valence, which is essentially the transfer of the gain and loss of electron pairs.

In valence, s has common valences such as , +4, and +6, and you can take a look at the fact that +4 and +6 are not able to be transferred.

So ...

Concentrated sulfuric acid can not oxidize sulfurous acid for a lifetime, the same reason.

Because NH3 is an alkaline gas, it is able to react with H2SO4:

NH3 + H2SO4 == NH4HSO4 (the reason for this is that H2SO4 is overloaded).

NH3 drying generally uses soda lime, because the acid desiccant will react with it, and the common neutral desiccant CaCl2 will react with NH3 to form, so it is not possible. Anhydrous cuso4 is generally used to test the presence of water rather than gas drying.

Concentrated sulfuric acid cannot dry alkaline gases and partially reducing gases.

Alkaline gases, you just know that there is NH3.

Reducing gases include H2S, NH3, etc.

Concentrated sulfuric acid cannot be used to dry NO, and nitrosulfuric acid will be generated, although the textbook says that it can.

There is also P2O5, but it should be noted that it cannot dry the above two gases; There are also anhydrous copper sulfate, anhydrous calcium chloride, soda lime (sodium hydroxide solids and quicklime are generally replaced by it), etc.

Calcium chloride can not be used to dry ammonia, it will generate CaCl2·XNH3, iron powder and CaO can also be used as food desiccant,