Chemical ionization, is ionization a chemical reaction

This question is more comprehensive, and I have solved this problem according to the following ideas, which can be referred to:

Step 1: Thinking about extreme cases: The extreme cases of this question (the so-called boundary cases) are nothing more than two cases, 1. Both beakers are too acidic:

It means that the acid has not reacted, which means that the zinc has finished reacting. The title says that the quality of zinc added to the two beakers is not equal, that means that the mass of zinc after the reaction is unequal, and further speaking, the amount of zinc involved in the reaction is unequal, and the amount of hydrogen produced by the equation is definitely not equal, and the amount of hydrogen produced naturally by adding more zinc is more.

2. There is an excess of zinc in the two beakers: the zinc has not been reacted, indicating that the two acids have reacted completely, although the volume of the two acids is the same, but the hydrochloric acid is a strong acid, the hydrogen ions can not be supplemented in the process of the reaction, acetic acid is a weak acid, the concentration of hydrogen ions will only slowly decrease due to ionization balance, and the hydrogen ions reacted in the end are bound to be more acetic acid, so that the hydrogen produced by acetic acid is more.

Step 2: Determine the actual situation. After thinking about the two endpoints, it is not difficult to conclude that the latter has a stronger ability to produce hydrogen with the same pH of hydrochloric acid and acetic acid.

Therefore, it should actually be an excess of acetic acid and hydrochloric acid is not accurate, it can be an excess of acid or an excess of metal, and item b is absolute, and it is excluded. Hydrochloric acid is bound to react more hydrogen ions to make up for its own deficiency, so the mass of the heart added should be more, a correct.

Step 3: Determine the remaining options: C is the best to confirm, it must be right, the production of a mol of hydrogen consumes 2a mol of hydrogen ions, and now the amount of hydrogen is equal to nature, and the amount of hydrogen ions reacted is equal.

c correct. d has been analyzed earlier, due to the ionization equilibrium of acetic acid, its hydrogen ion concentration decreases slowly after the beginning, while hydrochloric acid is not supplemented by hydrogen ions, and the hydrogen ion concentration decreases quickly.

After three steps, the correct answer ac is obtained

A The mass of zinc in a beaker is greater than that in a beaker B.

The amount of CH3COOH in the B beaker is greater than the amount of hydrochloric acid in the A beaker, and the hydrogen produced during the complete reaction must be more than that in the B beaker, so if there is zinc left in the B beaker, it is impossible to have the same volume of hydrogen. Therefore, it can only be that there is zinc left in the beaker of A, and according to the equality of hydrogen, the actual consumption of zinc is equal, and now there is zinc remaining in A, so there is more zinc in A, and A is correct.

Note: If there is no zinc left in the first place, the condition of unequal quality of zinc put in the first is not met.

Excess acid in a beager.

Since there is zinc left in the nails, the acid is insufficient. Mistake.

c Equal amount of zinc participating in the reaction in two beakers.

According to"At the end of the reaction, an equal amount of hydrogen is obtained"Illustrates that the amount of zinc actually reacted in the two beakers is equal. That's right.

After the start of the reaction, the c(h) in the B beaker is always smaller than the c(h) in the A beaker.

Ionization usually involves a physical process, the physical process is dissolution, and the chemical process refers to the breaking of a part of the original chemical bond in the electrolyte under the action of solvent molecules, such as water molecules. A chemical process is not a chemical change. In addition to the breaking of the old bonds, the chemical reaction also requires the formation of new bonds, so ionization is not a chemical reaction.

Ionization. <> ionization, also known as ionization, is the process by which atoms and molecules form ions under the action of (physical) energy. For example, ionization can be roughly subdivided into two types:

Continuous ionization and non-continuous ionization. In classical physics, only continuous ionization can occur. Non-continuous ionization, on the other hand, violates several laws of physics and is quantum ionization.

For example: 1. In aqueous solution, due to the action of water molecules, HCl is all dissociated into H+ and Cl2, so it is defined as a strong acid.

2. In aqueous solution, due to the action of water molecules, CH3COOH is partially dissociated into H+ and CH3COO, so it is defined as a weak acid.

3. Under light or high-energy ray radiation, gaseous atoms and molecules lose electrons and become ions.

Chemical reaction. A chemical reaction is a process in which molecules are broken into atoms, and the atoms are rearranged and combined to form new substances, which is called a chemical reaction. In the reaction, it is often accompanied by luminescence, heat, discoloration, and the formation of precipitates, etc., to determine whether a reaction is a chemical reaction'Depending on whether the reaction generates a new substance.

But nuclear reactions are not chemical reactions.

Chemical reactions are often accompanied by luminescence, heating, discoloration, and the formation of precipitates. Whether a reaction is chemical or not is determined by whether the reaction produces new substances. According to the theory of chemical bonds, it is also possible to determine whether an old bond is broken and a new bond is formed in a change process.

Update 1:I would like to ask if there are only covalent compounds in the ionization system. thx

Ionization refers to the process by which some ionic compounds form ions in water. For example: H2SO4

It is composed of 2H + buried SO4 2- combined.

When water is inserted, H + buried SO4 2- is generated

Whereas, H+ is acidic.

Therefore, H2SO4 is also a type of acid. The electrolysis system uses an electric current through the electrode rod (positive and minor poles) to form an ionic GE solution in water for one d.

One of the d ions is anodized.

The cathode or bucket is the process of reduction.

It is generally the process of moving (aq) to a different state. However, some do not move (aq) to other states of the process.

For example, when the Fe3(AQ)+ concentration is too high.

It will only be reverted to Fe 2+(AQ). For example: putting water in an electrolysis cell.

A carbon rod is used as an electrode.

H+ will be aspirated to the cathode to reduce to H2 (g).

The semi-reactive formula is 2H + E - H2(g) and OH - is sucked to the anode.

The half-reaction formula for oxidation to oxygen is: 4OH - O2 (G) + 2H2O + 4E - while ionized.

Generally are ionic compounds that do not covalent compounds (except water)!Because ionic compounds are first made up of ions.

So it can be separated.

Covalent compounds, on the other hand, are composed of electrons that share them.

So it is generally not separated (i.e. ionized)!

Reference: Yourself. Embarrassment.

1. What does ionization mean in chemistry: ionization refers to a process in which the electrolyte produces free stool ions in an aqueous solution or in a molten state.

2. The process of dissociation of electrolyte into freely moving positively charged cations and negatively charged catheteric ions in water under the action of water molecules is called ionization.

3. No need to be powered on! Ionization refers to the process by which an electrolyte produces free ions in a solution or in a molten state, which can be expressed by the ionization equation.

No! If so, the dissolution of a chemical substance in water is a chemical reaction. Where did so many reactions come from.

Ionization usually involves a physical process, the physical process is dissolution, and the chemical process refers to the breaking of a part of the original chemical bond in the electrolyte under the action of solvent molecules, such as water molecules.

A chemical process is not a chemical change. The chemical change is not a chemical change in addition to the breaking of the old bond and the formation of a new bond, so ionization is not a chemical change.

Whether ionization is a chemical change can not be generalized, the ionization of ionic compounds under melting is not a chemical change from the perspective of chemical bonds or new substances, and this process only has the destruction of old chemical bonds and the formation of new chemical bonds; Although free ions are generated, they are not new particles, but only the original ions are freed from the shackles of static electricity.

The ionization of the electrolyte in aqueous solution I think is a chemical change, and this complete process should include the dissociation of the electrolyte under the action of water molecules and the hydration with water molecules, in which there are both the breaking of old chemical bonds and the formation of new chemical bonds, and hydrated ions are also new products. When writing reactions in high school, the hydrated ions were simplified, and the hydration process was not reflected.

It's a chemical change.

Ionization refers to the process by which atoms and molecules form ions under the action of (physical) energy. Refers to the acquisition or loss of electrons by an atom or molecule gaining a negative or positive charge to form an ion, usually in combination with other chemical changes.

1. Ionization is a spontaneous process that does not require electricity.

2. The total number of positive charges carried by all cations in the solution and the total number of negative charges carried by all anions are equal, so the solution is not electrical. However, the number of cations is not necessarily equal to the number of anions.

Ionization can be broadly subdivided into two types: one sequential ionization and non-sequential ionization. In classical physics, only continuous ionization can occur.

Discontinuous ionization, on the other hand, violates several laws of physics and is quantum ionization.

You can think of it as a systematic process of decreasing the free energy of gibbs, or a process of reaching chemical equilibrium.

Pure ionization belongs to physical change, because only the chemical bond is broken, but generally after ionization, there will be water and process, forming hydrated ions, forming coordination bonds, which is a chemical change.