What is the property of a mixed solution of acetic acid and sodium acetate at the same concentration

The acidity analysis is as follows:

In solution there is ionization and hydrolysis, ie.

hac == h+ +ac-

ac- +h₂o === hac + oh-

ka = / c(hac)

kb = / ( x)

The degree of ionization of acetic acid is very small, and after mixing, it becomes smaller due to the homoionic effect.

(Note is approximately equal, can not be typed).

So c(h+) = x = ka = * 10 -5 mol l

ph = - lg(c(h+))=

Therefore, the solution is acidic.

It is generally acidic because the ionization of acetic acid is greater than that of hydrolysis.

It's acidic. Weak electrolyte, some hydrogen ions are in the aqueous solution.

Acetic acid is a weak acid.

Acidity. The amount of acetic acid and sodium acetate is mixed, because the hydrolysis is weak, the degree of hydrolysis is less than ionization, it can be considered that only the ionization of acetic acid occurs, so the concentration of hydrogen ions is greater than the concentration of hydroxide, and the concentration of acetate is greater than that of sodium ions, and the concentration of hydrogen ions is greater than that of hydroxide according to the conservation of charge.

Acetic acid is widely distributed in nature, for example in fruits or vegetable oils, but is mainly found in the form of esters. It is found in the tissues of animals, in excretions, and in the blood in the form of free acids. Many organisms can convert different organic matter into acetic acid through fermentation.

Sodium acetate generally exists in the form of sodium acetate trihydrate with three crystalline waters. Sodium acetate trihydrate is a colorless transparent or white particle crystal, which can be weathered in the air and is flammable. Soluble in water, slightly soluble in ethanol, insoluble in ether.

The topic is not mentioned, the default atmospheric pressure, pH = 7 is a neutral solution, C (OH-) = C (H+) = , this concentration is very small.

Sodium ions are completely ionized and have a larger concentration, whereas the sum of all anion concentrations is equal to the sum of cation concentrations due to the conservation of charge, so C(Na+)=C(CH3CoOh-) C(OH-)=C(H+)The next step is to determine the position of the acetic acid molecule, there are only 3 possibilities, in the far left, right, and middle of C(Na+)=C(CH3CoOh-) C(OH-)=C(H+). Since sodium acetate is weakly alkaline, it can be considered that the mixed solution is sodium acetate with a few drops of acetic acid added dropwise, so the leftmost and rightmost sides do not match, and can only be inserted in the middle.

So it is C(Na+)=C(CH3CoOH-) C(CH3CoOH) C(H+)=C(OH-).

pH=7 then c(h+) c(oh-).

The ions in the solution are Na+ and Ac-, because the solution is not charged as a whole, so the total number of anions and cations should be equal, that is, C(Na+) C(CH3CoO-).

Sodium acetate mixed solution with acetic acid in equal mass concentration pH

Hello, glad to answer for you. Acetic acid is a weak acid, and sodium acetate is the salt of acetic acid. When acetic acid and sodium acetate are mixed, they reach an equilibrium state where a part of acetic acid dissociates into acetate ions and hydrogen ions, while the other part of acetic acid is constantly dissociated from sodium acetate to maintain equilibrium.

Due to the presence of sodium acetate, it can neutralize a portion of the hydrogen ions, which reduces the acidity in the acetic acid solution. Therefore, compared to pure acetic acid, a mixed solution of acetic acid and sodium acetate will appear more neutral. The principle of conservation of materials states that in any chemical reaction, the total amount of matter should remain constant.

Therefore, in a mixed solution of acetic acid and sodium acetate, the total amount of acetic acid and sodium acetate should remain constant. However, their chemical state changes, and a part of the acetic acid will dissociate into acetic acid deficiency celery root ions and hydrogen ions, while the other part of the acetic acid will continue to dissociate from sodium acetate. Therefore, although the mixed solution of acetic acid and sodium acetate is less acidic than pure acetic acid, the total amount of acetic acid and sodium acetate does not change.

Because water is always in a state of conservation of materials, the ionization of water and the hydrolysis of salt tears are set aside.

Because the concentration of sodium acetate and acetic acid is equal, and there are ana=(a-)na+), ah=(a-).

h+), so c(a-)=c(a-from acetic acid)+c(a- from sodium acetate) (remember that formula 1 is the main stem and the key to solving the problem).

C(A-from acetic acid) = C (AH has ionized acetic acid) = C (AH starting acetic acid) [=C(Na+)]C(Ah), C(Na+)=C(A-from sodium acetate), synphysical, 2C(Na+)=C(A-)+C(Ah).

The amount of acetic acid and sodium acetate mixed with other substances is acidic, because the ionization of CH3COOH in this solution is greater.

The hydrolysis of CH3COO- releases more hydrogen ions than bound hydrogen ions, making it acidic.