Ionization Equation Questions About Ionization Equations

It seems to be electrolysis.

Under general electrolytic conditions, when the aqueous solution contains a variety of cations, the order of their discharge on the cathode is as follows: AG+ Fe3+ Hg2+ Cu2+ H+>Pb2+>SN2+>Fe2+ Zn2+>Al3+>Mg2+>Na+>Ca2+>K+; When an aqueous solution contains a variety of anions, the sequence of discharge on their inert anode is: S2->I->BR->Cl->OH->Oxygenate" F-.

It is to see what ions are in the solution and who reacts first.

1.It is Cl->OH-so electrolyze chloride ions first.

Cu2+ H+ so electrolyze copper ions first.

So electrolyze copper ions first.

so42-3.Similarly.

CuCl2 does not add water because it is salt, completely ionized, adding water is electrolysis, electrolysis needs to be added to power, ionization can be added to water or molten state

Naoh, H2SO4, Na2SO4 strong acid and strong alkali positive salt in electrolysis reaction equation is electrolysis of water, because cations are more active than H+, it is not easy to get electrons, anions are the same, and then H+ and OH- gain electrons and lose electrons, and generate H2, O2 looks like electrolysis of water.

1 Water doesn't participate in the reaction, it's just ionization, and even if you write water, there's a water on the left, and it's still a water on the right, and it's gone.

2 Who said it was necessary to write about water???

3 It depends on how you react, otherwise I can't write it to you.

hf = reversible = h+ +f-

NH4HCO2====NH4+ +HCO3-KhSO4 ionization in aqueous solution KhSO4====K+ +H+ +SO42-

Ionization in the molten state khso4 ====k+ +hso4- understand please be timely!! Good luck with your progress!!

hf====h+ +f-

nh4hco2====nh4+ +hco3-hco3-====h+ +co32-

KhSO4 in aqueous solution KhSO4====K+ +H+ +SO42- in the molten state KhSO4 ====K+ +HSO4-

To memorize the high range of weak acids: organic acids: CHCOOH, H2C2O4 (in fact, most organic acids are weak acids.

Inorganic acids: HCO3, H2CO3, H2SO3, H2S, HF These are soluble H2SiO3 (insoluble).

Weak bases: Mg(OH)2, Cu(OH)2, Fe(OH)3, Al(OH)3, these are insoluble, NH3·H2O is soluble.

Ionization equation for NaHCO3: Molten state: NaHCO3 == NA+ +HCO3- in water:

Step 1: NaHCO3 == Na+ +HCO3- Step 2: HCO3- H+ +CO3 2- Only the ionic bond can be interrupted when ionized in the molten state, so only Na+ and HCO3- can be generated, and the covalent bond in HCO3- will not be broken; When ionized in water, Na+ and HCO3- are ionized first, and then HCO3- can be further ionized (but HCO3- is a weak acid ion, and ionization is reversible).

Since HCO3- is an extremely weak electrolyte, it ionizes very little and is almost negligible in solution. So the second step ionization is very small.

Strong acids, strong bases, most salts, and active metal oxides are strong electrolytes;

The equal sign is used when the strong electrolyte is ionized, and the reversible sign is used for the ionization of weak electrolytes;

When the acid salt is ionized, it is necessary to distinguish the weak acid and the strong acid acid salt, such as NaHCO3 ionization to obtain Na+, HCO3-, NaHSO4 ionization in solution to obtain NA+, H+, SO42-, and Na+, HSO4- when melting

HSO3 - = reversible = H+ + SO32-

You're sure you're not writing it right.

Ionization refers to the process in which substances (such as acetic acid, NH3·H2O, H2S, HCl, etc.) or crystals, such as NaCl, NH4NO3, BACL2, etc., turn into ions in water.

Ionization equation

It is used to express the equation used to represent the ionization of electrolytes such as acids, bases, and salts into freely moving positive and negative ions when dissolved in water or in a molten state. Such as:

mgcl2=mg2+ +2cl-

naoh=na+ +oh-

In the above equation, the total number of positive charges of the cation and the total number of negative charges of the anion are equal in absolute value.

Description When a substance is dissolved in water or in a molten state, the process of dissociating into free-moving ions is called ionization.

The number of charges carried by ions: the atoms of metal elements are easy to lose electrons in chemical reactions, and the valency is generally positive, so metal ions have a positive charge, and its valency is several, that is, it has several units of positive charge.

The action ion equation is a chemical equation that reflects the nature of chemical reactions, in solution, the strong electrolyte that is easily soluble in water does not exist in the form of crystals, but under the action of water molecules, ionization becomes ions (in fact, after ionization, most of the ions are hydrated with water molecules to become hydrated ions, but this is a university content, in high school only requires to write about the ions before hydration, so I will not discuss them here). The reaction in the solution is essentially the reaction between ions, for example, HCl+AGnO3=AGCL +Hno3, and NaCl+AGN3=AGCL+Nano3, these two reactions seem to be different, but the essence is chloride ions and silver ions to generate silver chloride precipitation, which can be clearly seen with the ion equation: AG++Cl-=AGCL.

However, weak electrolytes, strong electrolytes that are not easily soluble in water, non-electrolytes or elemental substances are mainly present as molecules (or crystals) in solution reactions, so the molecular formula is still written when writing the ion equation. Therefore, the ionic equation is mainly written on the basis of the main form of existence of matter in solution.

(1) It should be understood that when writing the ion equation, all substances that are not completely ionized cannot be disassembled into ionic form, and it is not the second floor that "strong acids are not dismantled, and the rest are dismantled".

2) In addition, if kal(SO4)2·12H2O is to be ionized in this question, then it must be put in water, right? Didn't the 12 crystals in each kal(SO4)2·12H2O run into the solution? Therefore, to write the ionization equation of kal(SO4)2·12H2O, you do not need to consider the ionization of water, but only the ionization of kal(SO4)2.

Potassium aluminum sulfate dodecahydrate is a crystal, put in water to dissolve ionization, water is the solvent.

This H2O is the crystalline water of alum which is part of the molecular formula and exists in the form of a molecule.

Conservation of materials.

c(na+) =c(ha-)

Ha- enters the solution in three forms: C(A2-), C(Ha-), and C(H2A).

1. Calcium hydroxide solid and ammonium chloride solid are mixed and heated to produce ammonia, which is a direct reaction of solids, and the temperature cannot reach melting.

2 For example, the reaction of sodium metal and water is generally written at the secondary school level:

2Na + 2H2O = 2Na+ +H2 +2OH - and it is the hydrogen ions that actually participate in the reaction, not the water molecules.

3 Of course, HCL is a strong acid, completely ionized, hydrochloric acid, hydrogen ion concentration is also the source base. Acetic acid is a weak acid, some of the electrocracking slag is separated, the bond is lhac, most of it is in a molecular state, and the concentration of hydrogen ions is much less.

+3oh-

al3+ +2h2o = alo2 - 4h+2.The second difference should have different requirements for the width of the mold, and the teacher should have mentioned which is the default situation when he was in class, and we will not write it if we don't emphasize it.

3. Bisulfite should be further ionized.

4.Sodium sulfate? This should be no problem.

5. NaHSO4 = Electricity = Na+ + HSO4 - The ionization of Rongrong does not need to lose rent further.

I also want to know ...

Ahhhh

When Little Thirteen found out, tell me, Xie.