Who can find a summary of ion concentration relationships in common electrolyte solutions 50

Relationship of ion concentration in electrolyte solution:

1) Make good use of the two conservation relationships:

1.Conservation of charge: the number of anion and cation charges is equal, that is, the solution is electrically neutral;

2.Conservation of materials: that is, the number of atoms of various elements remains unchanged before and after dissolution.

These two conservation relations determine the basis for the establishment of the equality relationship between ions in solution.

ii) Comparison of the magnitude of ion concentration in an electrolyte solution:

1.Strong acid and weak alkali salt solution: focus on the hydrolysis balance of weak alkali ions;

2.Strong alkali and weak salt solution: focus on the hydrolysis balance of weak acid ions;

3.Weak acid solution: the ionization equilibrium of the main weak acid;

4.Weak alkali solution: the ionization equilibrium of the weak alkali is mainly grasped;

5.Acid salt solution of strong alkali and weak acid solution: the main balance of ionization and hydrolysis of acid ions.

3) Comparison of ion concentrations after mixing of two electrolyte solutions:

1.Strong acids mixed with weak bases (or strong bases mixed with weak acids):

a.When the reaction is just right, the main grasp is the hydrolysis of the two solutions mixed to generate strong acid and weak alkali salts;

b.When a weak base (or weak acid) remains, the acidity or alkalinity of the solution is determined by the hydrolysis of the strong acid and weak base (or strong base weak acid) and the relative size of ionization of the weak base (or weak acid).

2.strong alkali and weak salts are mixed with strong acids (or strong acids and weak alkali salts are mixed with strong bases); The ionization of the weak acid (or weak base) formed after mixing the two solutions.

When the concentration of weak acid (or weak base) is the same as that of salt, the degree of ionization of weak acid (weak base) is usually greater than that of strong base weak salt (strong acid weak alkali salt).

3.The conditions in the main topic are the mixing of strong alkali and weak acid (or strong acid and weak alkali salt mixed with weak alkali).

Then it depends on how the examiner comes up with the questions.

The H+ in the C(H+)=C(Oh-)+C(NH3·H2O) solution comes from two parts, one is the ionization of water, and the concentration is equal to the concentration of OH-.

The other part is the hydrolysis of NH4+, and the concentration is equal to the concentration of NH3·H2O.

NH4+ +H2O= Reversible=NH3·H2O+H+ Charge Conservation: The positive charge of all cation bands in the solution is equal to the negative charge of all anion bands.

Conservation of materials: Some ions in the solution can be hydrolyzed or ionized, the total number of atoms in these particles does not change, and the ratio of the number of states of some atoms does not change.

Conservation of protons: The amount of H+ and Oh- substances ionized by water is equal.

The relationship between the ionic strength and its concentration of the electrolytic luchite solution is ()aThe concentration increases, and the ionic strength increases greatly.

b.The ionic strength becomes weaker when the concentration increases.

c.The concentration does not affect the ionic strength.

d.With the change of concentration, the ionic strength changes irregularly.

Correct Answer: a

Summary. Yes, the properties of polyelectrolyte solutions are related to the degree of dissociation. The degree of dissociation refers to the ratio of the number of molecules or ions of the solute in the solution to the molecular weight of the solute, which can reflect the concentration degree of the solution.

The higher the degree of dissociation of the polyelectrolyte solution, the greater the conductivity of the solution, the greater the viscosity of the solution, the greater the refractive index of the solution, and the higher the temperature of the solution. To adjust the dissociation degree of the polyelectrolyte solution, you can change the concentration of the solution, change the temperature of the solution, change the pH value of the solution, etc. Changing the concentration of the solution can be achieved by adding solvents or solutes; Changing the temperature of the solution can be achieved by heating or cooling; Changing the pH of the solution can be achieved by adding acids and bases.

Yes, the properties of polyelectrolyte solutions are related to the degree of dissociation. The degree of dissociation refers to the ratio of the number of molecules or ions of the solute in the solution to the molecular weight of the solute, which can reflect the concentration degree of the solution. The higher the degree of dissociation of the polyelectrolyte solution, the greater the conductivity of the solution, the greater the viscosity of the solution, the greater the refractive index of the solution, and the higher the temperature of the solution.

To adjust the dissociation degree of the polyelectrolyte solution, you can change the concentration of the solution, such as bending, changing the temperature of the solution, changing the pH value of the solution, etc. Changing the concentration of the solution residue can be achieved by adding solvents or solutes; Changing the temperature of the solution can be achieved by heating or cooling; Changing the pH of the solution can be achieved by adding acids and bases.

Can you add, I don't quite understand it.

Yes, the properties of the solution of the solution in the polyelectric are related to the degree of dissociation. The degree of dissociation refers to the ability of the molecules of the solute in the solution to be broken down into ions, that is, the solubility of the solute. The higher the degree of dissociation of the polyelectrolyte solution, the greater the conductivity of the solution, the pH value of the solution will also change, and the temperature of the solution will also change.

In addition, the degree of dissociation of the polyelectrolyte solution also affects the formation of the precipitate of the solution, and when the degree of dissociation is higher, there will be more precipitate in the solution. Therefore, the properties of the polyelectrolyte solution are related to the degree of dissociation. The degree of dissociation of polyelectrolyte solution is affected by factors such as the type of solute, the concentration of the solute, and the temperature of the solution.

The higher the concentration of the solute, the higher the degree of dissociation, and the higher the temperature of the solution, the higher the degree of dissociation. In addition, the degree of dissociation of the polyelectrolyte solution is also affected by other substances in the solution, such as organic matter, oxidants, etc., which affect the degree of dissociation of the solution. In conclusion, the properties of the polyelectrolyte solution are related to the degree of dissociation, which is affected by the type of solute, the concentration of the solute, the temperature of the solution, and other substances in the solution.

Summary. Strong electrolyte solution, weak electrolyte solution.

Electrolytes in aqueous solution are dissociated into ions to varying degrees under the influence of water, and the solution composed of them after dissolving in water is called.

Strong electrolyte solution, weak electrolyte solution.

The degree of ionization is different.

A strong electrolyte with a high degree of ionization.

Is the one I asked correct?

Electrolytes in aqueous solution, dissociated into ions to varying degrees by the influence of water, and the solution formed by them dissolved in water is called This right?

Tell me directly, right.

Right. What do you choose? Hurry up. a

1) H+ in acetic acid with pH = 3 and OH- in sodium hydroxide with pH = 11 just offset, but acetic acid is a weak acid, and acetic acid with pH = 3 has no dissociated part, so acetate ion concentration sodium ion concentration, acetic acid is a weak acid is also the reason for the appearance of excess acetic acid after mixing in the same volume.

2) According to the concentration of acetate ions in 1) sodium ions, and the positive and negative charges in the solution should be equal, it can be obtained.

3) The ionization of water itself is very low, although it is affected by the appearance of weak acid acetic acid, but it is also very subtle, so the concentration of hydrogen ions and hydroxide ions is always less than the concentration of other ions in the solution.

c(ch3cooh)>10-3 c(naoh)=10-31.According to the conservation of charge: C(CH3CoO-) C(OH-) = C(Na+) C(H+).

The solute is sodium acetate and acetic acid, so the solution is acidic, so C(H+)>C(OH-)C(CH3COO-) C(Na+).

2.Sodium acetate and acetic acid so the solution is acidic. Hydrogen ion concentration Hydroxide ion concentration 3Acetic acid is a weak acid ionized out of H+ is very little. Hydroxide ions are obtained by CH3COO-hydrolysis, which is also very rare.

NaOH solution with pH = 11, OH - concentration =, CH3COOH with pH = 3, H + concentration =. You know, NaOH is a strong base and is completely ionized. Acetic acid is a weak acid that is partially ionized.

In addition to hydrogen ions and acetate in the acetic acid solution with pH=3, there is also a part of the acetic acid molecules that fail to ionize, so after mixing in equal volumes, there are CH3COONA and CH3COOH in the solution. Acetic acid continues to ionize acetate and hydrogen ions, acetate ion concentration sodium ion concentration; Hydrogen ion concentration Hydroxide ion concentration; After all, it is a weak acid, less ionized, and the concentration of hydrogen ions and hydroxide ions is less than that of Na+ and CH3Coo- plasma.

The degree of ionization of acetic acid is greater than that of acetate hydrolysis.

The degree of ionization of acetic acid is greater than that of acetate hydrolysis, then the solution is acidic, that is, the concentration of hydrogen ions, hydroxide ion concentration.

The degree of hydrolysis is very small, only a small fraction of acetate hydrolysis. Acetic acid is a weak acid with a very small degree of ionization.

1.Both sodium acetate and acetic acid will ionize, sodium acetate is complete, acetic acid partial, so the acetate group will be more than sodium ions.

2.Acetic acid is a weak acid, sodium acetate is neutral, and the solution is acidic, so it can be obtained.

3.Here we just have to prove that na+ is more than h+:

After mixing, the pH of the solution is significantly higher than 3, and if H+ is as much as Na+, the pH is 3, so the above proposition is correct.

1. Because acetic acid is a weak acid, when pH=3, its acetic acid molecular concentration is much greater. When reacting with sodium hydroxide solution with pH=11, acetic acid molecules continue to ionize, so the concentration of acetic acid molecules is greater than the concentration of sodium ions;

2. Because the ionization of acetic acid is greater than the hydrolysis of acetic acid, this is the property of acetic acid. More hydrogen ions are removed by ionization than hydroxide ions are produced by hydrolysis;

3. After mixing, most of the hydrogen ions and hydroxide ions will combine to form water, and only a few hydrogen ions and hydroxide ions are in the solution.

The ionization degree of weak electrolyte is less than that of strong electrolyte, and the ionization of weak electrolyte is less, and some molecules are retained, so the conductivity is not as good as that of strong electrolyte. In the solution, the greater the ion concentration, the stronger the conductivity.

For example, the concentration of hydrogen ions and hydroxide ions in water at room temperature is 10 -7, so the conductivity of water is not strong.

The junior high school teacher added dilute sulfuric acid when doing the electrolysis water experiment, the purpose was to increase the concentration of hydrogen ions, otherwise the experiment would be difficult to carry out.

In summary, the stronger the conductive capacity, the greater the ion concentration.

The conductivity of the solution is related to the concentration of the ions, and the number of charges carried by the ions.

The higher the concentration, the higher the number of charges, and the stronger the conductivity.

The main thing in the solution is ion conduction, and the concentration of ions with strong conductivity is larger.

About "Ionization equilibrium constant of weak electrolytes.

does not change with the change of the elimination initial concentration of the electrolyte solution", ab==reversible==a+ +b-

then, k(ionization) = [a+]·b-] ab].

The [a+], b-], and ab] in the first part of the formula represent the concentration of the substances at ionization equilibrium, respectively, a+, b-, and ab.

The magnitude of the ionization equilibrium constant reflects the degree of ionization of the weak electrolyte, which varies at different temperatures.

But the ionization equilibrium constant is not affected by the concentration.

And "the degree of ionization of the weak electrolyte."

It has to do with the concentration of the weak electrolyte solution" is better understood, you just have to remember that "the more diluted, the more ionized". Because after adding water, the concentration of ionized ions in the solution decreases, and the probability of these ions meeting decreases, that is, the probability of combining into electrolyte molecules decreases.