Why is acetic acid CH3COOH monobasic acid Isn t there 4 hydrogen atoms

Either there are a few hydrogens or a few acids, and CH4 also has four hydrogens, but it is not an acid. The key is whether it can ionize in water to produce hydrogen ions. Only H in -COOH in acetic acid is easily ionized in water to produce hydrogen ions.

CH3COO- is a whole, and there is only one H+ that is truly ionized in water, so it is a monobasic acid, which is the same principle as why H2SO4 is a dibasic acid (H2SO4 is 2H+ and SO4 2- after ionization).

Because acetic acid is a weak acid, and it contains an acetate group, which is unified, and the other H, is combined with carbon!

Because there's only one hydrogen that binds to oxygen, and those three binds to carbon.

The first floor is not comprehensive, COOH is a carboxylic acid, in which the OH hydroxyl group ionizes out H+ and is acidic, so it is a monobasic acid.

You look up the structural formula: h o

h---c---o---o---h

In organic chemistry, only hydrogen in the hydroxyl group can be ionized.

Hydroxyl group: i.e. OH

The difference between him and hydroxide: hydroxide is a negatively charged ion, while the hydroxyl group is an O with an H

The reason why acetic acid is written as ch3cooh can be understood by looking at the structure above. CH3COOH is called Structural Simplified.

We can know how many elements an acid is by looking at the number of hydroxyl groups (OH-) of an acid, because only hydrogen that is linked to oxygen to form a hydroxyl group can be ionized into the solution, and below is the structural animation of acetic acid, you can see it clearly.

Resources.

You can't just look at the chemical formula and jump to conclusions!

N-silicic acid (H2SiO4) should be regarded as a monohydrate (H2SiO3+H2O) of metasilicic acid, so it should be a dibasic acid!

Boron is an electron-deficient substance, so the "ionization" mechanism of boric acid is: H3BO3 + H2O = H4BO4 + H ions! So it's a mono acid!

Acids are classified according to the number of hydrogen ions obtained by acid ionization, which are divided into monoacids, dibasic acids, and polyacids. Polyacids refer to acids of ternary and above (polyacids can also be divided into trinorant acids, quaternary acids, etc.).

Hypophosphorous acid (<>

Only one hydrogen ion can be ionized in water, so hypophosphorous acid is a monobasic acid. A few "yuan" refers to several corresponding functional groups. Therefore, to judge the number of elements, it is necessary to judge how many corresponding functional groups there are.

Hypophosphorous acid is often added to soft drinks because it is not absorbed. Therefore, it is less dangerous, but the extraordinarily concentrated hypophosphorous acid can harm the stomach and intestines. When the acid of the solid is heated to 130 140, the disproportionation decomposes to.

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is quite a strong monobasic acid.

Summary. In the acetic acid chemical formula, CH3 is a methyl group and COOH is a carboxyl group, and the carboxyl group consists of one carbon atom, two oxygen atoms, and one hydrogen atom, and the chemical formula is "carboxyl COOH.""

Hello, because acetic acid can only ionize one hydrogen ion so it is a monobasic acid with a hydrogen atom ch3cooh=ch3coo-+h+

The chemical formula of acetic acid is C2H4O2 and the structure is CH3COOH. Acetic acid, also known as acetic acid and glacial acetic acid, is an organic monobasic acid, in the chemical formula of Ranfeng acetic acid, CH3 is methyl, COOH is a carboxyl group, the carboxyl group is composed of a carbon atom, two oxygen atoms and a hydrogen atom, and the chemical formula is "carboxyl COOH.""

So acetic acid has only one hydrogen atom.

Do you understand?

Depending on the molecular structure, generally one hydroxyl group attached to the carbonyl group can be ionized. H2POOH is similar to HCOOH in that the phosphorus 5 valence and carbon 4 valence are just connected to a hydrogen.

The judgment is based on the ability to ionize several hydrogen ions. This hypophosphorous acid can only ionize one hydrogen ion after being dissolved in water, because the degree of hydrolysis of H2PO2- ions is greater than the degree of ionization (refer to bicarbonate ions), so it is weakly alkaline, and if a hydrogen ion is ionized to become HPO2 -2, it is moderately strong alkaline, and the degree of hydrolysis is extremely strong (refer to carbonate ions), and it is difficult to coexist with a large number of hydrogen ions. Therefore, it is generally believed that only the first hydrogen ion is ionized, which is a monobasic acid.

The ionization containing several hydrogen ions is a few elemental acids, and H2PO2- is a hypophosphary.

Ionization of a hydrogen ion is a monoacid.

He's. The hypophosphite molecule has only one hydroxyl group, and only the hydrogen atom on this hydroxide group can be ionized. The other two hydrogen atoms are directly attached to the phosphorus atom and cannot be ionized at all.

Summary. The structure formula of acetic acid is that a water molecule can form 4 hydrogen bonds, but each hydrogen bond is formed by 2 water molecules, so on average, each water molecule can form 4 2=2 hydrogen bonds, while acetic acid has only one water molecule, so there are only two hydrogen bonds.

Can the problem be solved?

The structure formula of acetic acid is a water molecule that can be formed and annihilated into 4 hydrogen bonds, but each hydrogen bond is formed by 2 water molecules, so on average, each water molecule can form 4 2 = 2 (one) hydrogen bonds, while acetic acid only has one water molecule, so there are only two hydrogen bonds.

Sorry, long waiting.

Why does pure acetic acid have no hydrogen bonding when it comes to water?

There is also a simple structure of ch3cooh

So how do you explain that acetamide has three hydrogen bonds.

These two compositions are different, acetic acid can form an eight-membered ring through intermolecular hydrogen bond bimerization, so there are two intermolecular hydrogen bonds.

2 acetic acids form two intermolecular hydrogen bonds, which should be one according to the equalization method, if you say so, but the fact is two.

Hydrogen on the hydroxyl group of acetate and oxygen on the carbonyl group of another residual acetic acid molecule form a hydrogen bond. Sometimes two molecules form hydrogen bonds with each other. It will form a loose two-concrete sail pattern.

I'm sorry, but that's all my chemistry skills

Okay, thanks. Uh-huh.

Summary. There are several cases.

Molecular equivalent hydrogen atoms generally have the following conditions:

Hydrogen atoms attached to the same methyl group in a molecule are equivalent, such as hydrogen atoms on methane; The three-dimensional structure of methane space is a tetrahedral.

The hydrogen atoms on the methyl groups attached to the same carbon atom are equivalent, such as neopentane (which can be regarded as four methyl groups replacing the four hydrogen atoms in the methane molecule), the four methyl groups are equivalent, and the hydrogen atoms on each methyl group are equivalent, that is, the 12 hydrogen atoms in the neopentane molecule are equivalent; There is one unary substitute.

If a hydrocarbon has m hydrogen atoms, then its n-element substituents are equal to the (m-n) type of substituents].

Hydrogen atoms in a mirror-symmetrical position (equivalent to the object-image relationship in plane imaging) are equivalent, e.g. 18 hydrogen atoms in the 2,2,3,3-tetramethylbutane molecule are equivalent.

ch3ch2ch2cl why there are 3 equivalent hydrogen.

There is no axis of symmetry in this structure, and the hydrogen attached to each carbon atom is an equivalent hydrogen.

Equivalent hydrogen refers to the atomic chain of hydrogen in the same position in the organic molecule. Obviously, there are as many unary substituents as there are hydrogen equivalents. This method of determining the number of isomers of unary substituted isomers by equivalent hydrogen is called the equivalent hydrogen method.

There are three methods for judging equivalent hydrogen, namely hydrogen atoms connected to the same methyl group in the molecule, hydrogen atoms connected to the methyl group of the same carbon atom, and hydrogen atoms in the symmetrical position of the Hengyin mirror.

There are several cases in which the molecular equivalent hydrogen atom generally has the following conditions:The hydrogen atoms attached to the same methyl group in the molecule are equivalent, such as the hydrogen atom on methane; The three-dimensional structure of methane space is a tetrahedral.

The hydrogen atoms on the methyl groups connected to the same carbon atom are equivalent, such as neopentane (which can be regarded as four methyl groups replacing the four hydrogen atoms in the methane molecule), the four methyl groups are equivalent, and the hydrogen atoms on each methyl group are equivalent, that is, the 12 hydrogen atoms in the newly modified pentane molecule are equivalent; There is one unary substitute. If a hydrocarbon has m hydrogen atoms, then its n-element substituents are equal to the (m-n) type of substituents].

Hydrogen atoms in the mirror symmetrical position (equivalent to the object-image relationship in plane imaging) are equivalent, e.g., the 18 hydrogen atoms in the 2,2,3,3-tetramethylbutane molecule are equivalent.

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Ask about custom messages].

First of all, we need to correct the idea that how many hydrogen atoms are a few yuan of acid.

To see how many acids an acid is, it is necessary to see how many hydrogen ions each atom can ionize.

Acetic acid: composed of a methyl group (CH3-) and a carboxyl group (-COOH), methane (CH4) itself is already very stable, not to mention methyl group (CH3-), so the three hydrogen atoms on the methyl group will not be ionized out to form hydrogen ions; The hydrogen atom in the carboxyl group (-cooh) is easily ionized to form hydrogen ions.

It can be seen that an acetic acid molecule can only ionize one hydrogen ion, so it is determined to be a monobasic acid.

Only H on the carboxyl group can be ionized.