Can anyone help me with some questions about inorganic chemistry in middle and high school chemistry

The landlord is kidding. It's okay to say in junior high school, but the chemical formula in high school changes back and forth, so many times, it's impossible to write them all!!

I'll just list a few: (parentheses indicate conditions or reaction types).

Decomposition: The decomposition reaction is ab=a+b, some are redox reactions, some are not.

CaCO3 (high temperature) CO2 + CAO (redox).

CuSO4 5H2O CuSO4 + H2O (non-redox).

Compounding: The compounding reaction is A+B=AB, some are redox reactions, and some are not.

C+O2 (ignition) CO2 (redox).

AGCL+2NH3 H2O AG(NH3)2Cl (non-redox).

Displacement: The displacement reaction generally occurs in solution, which is A+BC=AC+B, and all reactions are redox reactions.

fe+2cucl=fecl2+2cu

zn+2hcl=zncl2+h2↑

Metathesis: The metathesis reaction generally occurs in solution, which is AB+CD=AD+CB, HCl+Naoh=NaCl+H2O

bacl2+na2so4=2nacl+baso4↓

na2s+2hcl=2nacl+h2s↑

Redox: The redox reaction is the loss of electrons, the valency of the elements that lose electrons increases, and the valency of the elements obtained by the electrons decreases.

2COO2 (ignited) 2CO2

Decomposition: One thing becomes several.

Compounding: Several become one.

Replacement: In junior high school, metal is added to acid or salt.

Metathesis: The two things are essentially less ionic concentration due to the presence of water, gas or two other things on the side of the precipitate in the product.

You're asking the wrong question! There is no ...... of diethylene and diethanol (diacetic acid as well as diacetaldehyde).It only appears as a group name in complex compound excavations, and is not required in high school.

Ethylene: colorless and odorless gas, denser than air, insoluble in water, soluble in organic solvents.

The molecular formula is C4H6, and the structure is simplified as CH2=CHCH=CH2It can react with chlorine water to form 1,2,3, and judge 4-tetrachlorobutane. It can be added with hydrogen and can be oxidized by potassium permanganate.

Ethylene glycol: colorless with special odor gas. Soluble in water and organic solvents.

Molecular formula C2H6O2, file filial piety structure formula (CH2OH) 2The chemical properties are the same as ethanol.

<> (1) oxidation reaction (strictly speaking, dehydration); Malonic acid.

2) carboxyl group; >h structure.

Synthetic routes.

Answer: A according to the question stem: add excess dilute sulfuric acid, the type of anion in the solution remains unchanged--- you can judge that there is SO42-excluding BA2+ in the solution

The amount of ions contained in the substance is 1mol--- according to the conservation of charge to exclude Al3+ to add excess dilute sulfuric acid, there are bubbles to produce --- sulfuric acid to provide hydrogen ions, nitric acid has oxidizing properties, oxidizes Fe2+, generates NO and the air turns reddish-brown. At the same time, Fe3+, KSCN solution was generated, and the solution was blood-red.

At the same time, it is judged that d is correct.

a If a sufficient amount of NaOH solution is added to the solution, after sufficient reaction, filtration, washing (iron hydroxide), and cauterization, the final solid (iron oxide) mass is 80g

Hope satisfied.

a。When nitrate ions meet hydrogen ions, they are concentrated nitric acid, and then oxidize divalent iron ions, and then produce nitric oxide to produce trivalent iron ions. Other ions are then ejected according to the electroneutrality of the solution. The solid in a should be 1mol of iron hydroxide, not 72 grams.

I think it's okay to choose a to analyze the first floor.

nh4)2so4 → nh3 + so2 + n2 + h2o

NH4)2SO4 is the S element as an oxidizing agent and N element is a reducing agent.

Each S atom gains 2 electrons, and every N atom that loses an electron loses 3 electrons.

Then n(so2) : n(n2) = 3 : 1

nh4)2so4 → nh3 + 3so2 + n2 + h2o

According to the sulfur element:

3(nh4)2so4 → nh3 + 3so2 + n2 + h2o

According to n elements:

3(nh4)2so4 → 4nh3 + 3so2 + n2 + h2o

Complete the writing of the equation according to the h element:

3(nh4)2so4 =△2nh3↑ +3so2↑ +2n2↑ +6h2o

Finally, check the omissions of the equation against the o-element (although this step can theoretically be omitted, it is best to get into the habit).

Left: 3 * 4 = 12

Right: 3 * 2 + 6 * 1 = 12

That's right! According to this equation, the ratio of the number of nitrogen atoms that change in valency to those that do not change is: Zheng this.

2n(n2) :n(nh3) =2 * 2 : 2 = 2 : 1

2(nh4)2so3+o2=2so2+n2+2nh4+4h2o

Among them, ammonia becomes high-co., nitrate, and the price of nitrogen is changed to widen the wheel, and oxygen becomes hydration, and the valence is changed. From the equation, the ratio of nitrogen change to invariance is 1:1.

Ionic equation: Fe2+ +2HCO3- =FeCO3 (precipitate) + H2O +CO2 (gas).

This reaction uses the principle of hydrolysis, ferrous ions and bicarbonate ions are weak ions, which can be hydrolyzed in water, but due to the large degree of bicarbonate hydrolysis, the hydrolysis of bicarbonate is considered at this time, 2HCO3- +H2O = H2CO3 + CO3)2-, and ferrous ions are immediately combined with the hydrolyzed carbonate ions, so that the reaction moves forward and approaches completeness, so this reaction can be completely reacted and can be equalized.

The principle of this process is as follows: the first step: the use of different solubility, and the addition of a certain substance to remove impurities, can obtain ferrous sulfate crystals, dissolved through the above process to generate ferrous carbonate, calcined and heated to obtain ferric oxide, and ferric oxide in the case of 1800K oxygen loss to generate ferric oxide.

feso4+2nh4hco3=feco3+(nh4)2so4+h2o+co3

If you don't understand, just discuss it with me.

I went to look at the answer again, and he gave it: Fe2+ +2HCO3-=FeCO3+H2O+CO2

And then there is another step of oxidation, in fact, I think the oxidation step can be left without writing, because he didn't ask about the reaction after that.

So the landlord can refer to.

I remember you had another question that was written in purple, and I was speechless. Kill people. H2O of a, d, h...Woo, I don't know how to ask, a lot of them are characteristic reactions in high school, write them down, write down the equations,