Why is acetic acid more acidic than carbonic acid, and is acetic acid stronger or weaker than carbon

From the structural explanation, it should be that the carbonic acid is large. OH has an electron-withdrawing effect.

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.

Theoretical analysis: The comparison between acetic acid and carbonate acidity can be obtained by verifying whether carbonate and acetic acid can react to form carbon dioxide, and clarifying lime water is often used to verify whether carbon dioxide is generated.

Specific experiment: Acetic acid was added to CaCO3 in a large test tube and the phenomenon was observed. The resulting gas is introduced into the Ca(OH)2 solution and the phenomenon is observed.

Fact: After adding acetic acid to CaCO3, bubbles emerged. The gas is introduced into the Ca(OH)2 solution and the solution becomes turbid.

Conclusion: Acetic acid reacts with CaCO3 to form carbon dioxide.

2ch3cooh+

CaCO3=(CH3CoO)2Ca+CO2, Final conclusion: acetic acid is more acidic than carbonic acid.

The acidity of carbonic acid and acetic acid can be quantitatively compared by ionization constants, and it is known that acetic acid is more acidic than carbonic acid, so acetic acid and carbonate can undergo metathesis reactions to obtain carbonic acid and decompose carbon dioxide and water.

Carbonic acid is a dibasic weak acid with the chemical formula H2CO3. The ionization constant of carbonic acid is small.

However, it is also considered that carbonic acid is a moderately strong acid, because its acidity is similar to that of phosphoric acid according to the equation (OH)NROM of the acidity of inorganic acid. At room temperature and pressure, the concentration of carbon dioxide saturated solution is about 0 033mol l, and the pH is, pka=.

h2CO3 (pka1=,pka2=,p stands for negative common logarithms. The pH of a saturated carbonic acid solution (pure CO at a pressure of 1 atm) is about 4, whereas under natural conditions the CO content is pH = when dissolution reaches saturation. This is also the reason why acid rain is defined as rain with a pH less than.

To achieve pH, this can be achieved by cooling down and pressurizing (actually increasing the CO concentration). Carbonic acid is a dibasic acid whose ionization is divided into two steps:

h₂co₃ ⇌hco₃-+h+；ka1 = ; pka1 = °c)hco3-⇌ co32-+ h+；ka2= ;pka2 = (25 °C) It is important to note that the above values are not suitable for the actual estimation of the acidity of carbonic acid, since the acidity of individual carbonic acid molecules is stronger than that of both acetic acid and formic acid. In fact, the carbonic acid molecule is only present in the dynamic equilibrium of carbon dioxide and water, and its concentration is much lower than that of carbon dioxide, so the acidity is actually lower.

Acetic acid can react with sodium carbonate to form carbonic acid

2ch3cooh+na2co3→2ch3coona+h2o+co2↑

This reaction can show that acetic acid is more acidic than carbonic acid. That is, it is often said that strong acid makes weak acid.

The order of acidity of formic acid, acetic acid, and carbonic acid from strong to weak is formic acid, acetic acid, and carbonic acid.

Formic acid, acetic acid, oxalic acid.

It belongs to carboxylic acids, which are more acidic than carbonic acid, while phenol.

is weaker acidic than carbonic acid. Among the three carboxylic acids, oxalic acid is a dibasic carboxylic acid, which is more acidic than monocarboxylic acid, and formic acid is more acidic than acetic acid than acetic acid. The order of acidity is: oxalic acid, formic acid, acetic acid, phenol. So, the least acidic is phenol.

1. Hydrogen sulfide: hydrogen sulfide is an inorganic compound, generally a colorless, flammable acid gas, with a foul odor and a smell like rotten eggs when the concentration is low;

2. Metaaluminic acid: also known as tetrahydroxy aluminic acid, metaaluminic acid is a weak acid, an acid that is weaker than carbonic acid;

3. Hypochlorous acid: an oxygenated acid of chlorine element, which is the lowest price oxygenated acid of chlorine element, but its oxidation is very strong in the oxygenated acid of chlorine element, second only to perchloric acid;

4. Phenol: also known as carbolic acid and hydroxybenzene, it is the simplest phenolic organic matter, a weak acid, a colorless crystal at room temperature, and toxic.