Carbonic acid, acetic acid, bicarbonate, acidity, acidity, acid

Acetic acid, carbonic acid, bicarbonate, heel.

The acidity of acetic acid and carbonic acid is: acetic acid is more acidic. Acidity is often expressed by the PKA of the standard solution of the acid (I = 0, temperature 25 degrees Celsius, 1 standard pressure, C = mol L), that is, the acidity constant.

In weak acids, the dissociation constant of the acid should be judged. (The lower the number, the more acidic).

At room temperature, the pH value of the solution is acidic when it is below 7. The lower the pH, the more acidic it is. Acids can neutralize with alkalis to form salts and water, as well as acid-base indicators that can change color, react with active metals to form hydrogen, and metathesis with certain salts to form new acids and salts, which are called acidity.

Acidity of acetic acid:

The carboxyl hydrogen atom of acetic acid can be partially ionized into hydrogen ions (protons) and released, resulting in the acidity of carboxylic acid. Acetic acid is a single weak acid in aqueous solution, the acidity coefficient is, pka=, and the pH of the acetic acid solution with a concentration of 1mol L (similar to the concentration of household vinegar) is, that is, only the acetic acid molecule is dissociated.

The above content reference: Encyclopedia - Acidic.

Carbonic acid is a weak acid. Carbonic acid, with the chemical formula H2CO3, is a dibasic weak acid. The concentration of the saturated solution of carbon dioxide is approximate, the pH is, pka=.

Weak acid usually refers to the acid that is only partially ionized after being dissolved in water, and HA is commonly used to represent acid, so in addition to ionizing proton H+ in the aqueous solution of weak acid, there are still a lot of HA in solution, and the chemical formula is as follows: HA(AQ)<-H+(AQ)+A-(AQ).

Chemistry:

Chemistry is a kind of natural science, mainly at the molecular and atomic levels, studying the composition, properties, structure and change laws of matter, and creating new substances (the essence is molecules that do not exist in nature). The world is made up of matter, and there are two main forms of change: chemical and physical changes (and nuclear reactions). Similar to particle physics and nuclear physics, which study the smaller scale, chemistry studies the material structure of atoms, molecules, ions (groups), chemical bonds, intermolecular forces, and other interactions.

Hypochlorous acid. More acidic than bicarbonate.

The acidity of the ions.

According to the ionization equilibrium is often the number of this brother before.

Hypochlorous acid ka=3 10-8

Carbonic acid ka1 = ka2 =

From this we derive the strength of acidity: carbonic acid is stronger than hypochlorous acid and stronger than bicarbonate ions.

Proton capacity of corresponding ions: bicarbonate ions are smaller than hypochlorous acid and dust sulfons are smaller than carbonate ions.

Therefore, the principle of preparing bleaching powder can only be calcium bicarbonate.

and hypochlorous acid.

The chemical formula of acetic acid is CH3COOH, the chemical formula of carbonic acid is H2CO3, and the acidity of acetic acid and carbonic acid can be quantitatively compared by the constant of ionization. Since the ionization constant of acetic acid is greater than that of carbonic acid, acetic acid is more acidic than carbonic acid. Moreover, when acetic acid and carbonate are together, metathesis reaction can occur to form carbonic acid, and decompose water and carbon dioxide, which is in line with the principle of strong acid to weak acid, so the acidity of acetic acid is stronger than that of carbonic acid.

Carbonic acid and bicarbonate are both ions of carbonatesTheir acidity and alkalinity depend on the concentration of hydrogen ions (H+) and hydroxide ions (OH-) that they produce when they react with water.

Carbonic acid and bicarbonateInFriends in the water cover wideThe reaction is as follows:

It can be seen,Carbonic acid, whileCarbonic acid stuffy guess hydrogen root

ForSodium carbonate and sodium bicarbonate, themin the waterThe reaction is as follows:

It can be seen,Sodium carbonate in water, whileSodium bicarbonate in waterTherefore, sodium carbonate is more alkaline than sodium bicarbonate.

The acidity and alkalinity of carbonic acid and bicarbonate are determined by the concentration of hydrogen ions and hydroxide ions produced when they react with water, whereas the alkalinity of sodium carbonate and sodium bicarbonate depends on the concentration of sodium ions and hydroxide ions that they produce when they react with water.

1) Carbonic acid --- binary weak acid, there are two steps of electric simple hand separation:

h2co3 <=h+ +hco3-

HCO3 - The first step of ionization >> the second step of ionization.

Bicarbonate hydrolysis is alkaline and ionization is very weak!

2) Sodium carbonate --- has two steps of hydrolysis:

CO3 2- +H2O <=HCO3- +OH-HCO3- +H2O <=H2CO3 + OH- The first step is electrophora hydrolysis >> the second step hydrolysis.

Sodium bicarbonate mainly occurs in the second step of hydrolysis as above!