HI Lewis Structure

HI lewis structure consists of only one H-Br bond. Hi is a neutral molecule so there are no charges found on atoms in the HI lewis structure. The central atom in HI is iodine, which is surrounded by hydrogen atoms.

HI Lewis Structure

:eight_pointed_black_star: Hydrogen Iodide (HI) Lewis Structure

Element Hydrogen Iodide (HI)
Chemical formula HI(aq)
Molar mass 127.91 g/mol
Appearance colorless liquid
Odor acrid
Density 1.70 g/mL
Boiling point 127 °C
Solubility in water Aqueous solution

Hydrogen iodide (HI) has only one H-Br bond in its Lewis structure. Because HI is a neutral molecule, its atoms have no charges. The bromine atom in the HI molecule has three lone pairs. Because of its simplicity, the Lewis structure HI is a snap to draw. The HI molecule has just one hydrogen atom and one iodine atom. The lone connection between an atom of hydrogen and an atom of iodine forms the lewis structure of HI.

  • On each of the two sides of the central iodine atom, there is one hydrogen atom, and on the other side, there are three lone pairs of iodine, all in the same molecular geometry. Hydrogen, on the other hand, has just one valence electron in its outermost shell, meaning that iodine has seven electrons in its outermost shell. One valence electron is needed on each of the iodine atom’s outermost shells to complete the octet.

  • A single hydrogen atom joins forces with the core iodine to form covalent bonds, which leaves the iodine atom with three unpaired electrons. The core atom of iodine has three lone pairs of electrons that oppose the bond pairs of the H-I bond… H-I bond pairings polarity is thought to lead to linear or tetrahedral geometry structures, according to VSEPR theory.

  • In order to give birth to the HI molecular shape, the two H-I bonds in the molecule are organized in an asymmetrical polarity order around the linear or tetrahedral geometric structure. Since the lone pairs of electrons in iodine repel each other electrically, this results in the HI molecule having a tetrahedral or linear molecular geometry.

The Lewis structure of HI has a dot electron representative structure. New molecular species of HI are formed when the valence electrons of the atoms involved in a chemical process are mixed together. The molecule is nothing more than a collection of atoms’ valence electrons. The molecular structure, on the other hand, transforms it into bond pairs and lone pairs.

:small_red_triangle_down: Steps Of Drawing HI Lewis Structure Molecular Geometry

When drawing a Lewis structure, there are various processes that must be completed. In accordance with the complexity of the molecule or ion, the number of stages can be varied.

Because the HI molecule is simple, and there is no overall charge, all of these processes are not necessary to complete the Lewis structure in order to make it functional. That said, all of the processes involved in this lesson are stated and described in full for your convenience.

  1. Determine the total number of electrons in the valance shells of the hydrogen atom and the iodine atom.

  2. The total number of electron pairs that exist as lone pairs and bonds

  3. The choosing of the center atom

  4. Atoms with lone pairs should be marked.

  5. If there are charges on atoms, they should be marked.

  6. Verify the stability of the structure and decrease charges on the atoms by converting lone pairs to bonds in order to create the best Lewis structure possible

:small_red_triangle_down: Lone Pairs On HI

After establishing the central atom and drawing a diagram of the HI molecule, we may begin marking lone pairs on the atoms in the molecule. Keep in mind that there are a total of four electron pairs in the universe.

  1. There is already one link in the skeleton that has been drawn.

  2. Normally, the leftover electron pairs should be used to label atoms on the exterior of the nucleus. There are only two hydrogen atoms in HI because a hydrogen atom cannot have more than two electrons in its final shell since it is just two atoms.

  3. In the hydrogen atom, there are already two electrons present. As a result, we are unable to identify the remaining electron pairs on the hydrogen atom.

  4. As a result, make a mark on the iodine atom using the three electron pairs that remain. The iodine atom will require three lone pairs in order to complete the octal.

:small_red_triangle_down: Total Number Of Electrons Of The Valance Shells Of HI

H2O2 is made up of two elements: hydrogen and iodine, which are both reactive. When it comes to the periodic chart, hydrogen belongs to group IA, which means it only contains one electron in its final shell (valence shell).

A group VIIA element in the periodic table, iodine has seven electrons in its final shell and belongs to the group VIIA element. With this information, we can calculate the number of electrons present in the valence shells of hydrogen and bromine atoms.

Element Total Valence electrons
Valence electrons in iodine atom 7 * 1 = 7
Valence electrons in hydrogen atom 1 * 1 = 1
Total valence electrons 1 + 7 = 8


hydriodic acid (also known as hydroiodic acid) is an aqueous solution of hydrogen iodide in water (HI). An aqueous solution totally ionizes this HI molecular potent acid. It has no color. HI concentrations range from 48 to 57 percent in concentrated solutions. Alkyl iodides are formed when hydroiodic acid, like other hydrogen halides, reacts with alkenes.

:eight_pointed_black_star: Key Points To Keep In Mind When Drawing HI Lewis Structure

Drawing HI Lewis Structure

The HI Lewis structure may be drawn using a three-step process. For the first stage, we draw the Lewis structure of the Iodine (HI) molecule, adding electrons around the Iodine atom; for the second step, we add valence electrons to the hydrogen atom; and finally, the HI Lewis Structure is created by merging these two steps.

  • There are several electron pairs in each bond in the HI molecule, which can be seen in the molecule’s Lewis structure. Since molecules are formed by pairs of electrons, a theoretical model is known as the Valence Shell Electron Pair Repulsion Theory (VSEPR Theory) may be used to predict their geometric structure.

  • The strength of the solitary HI molecular bonds may be calculated by adding their bond polarities (dipole moment properties of the HI molecule). For example, hydrogen-iodine bonds in hydrogen iodide (HI). Because of the tetrahedral structure’s three lone electron pairs, the polarity of the H-I bonds in the HI molecule is not canceled.

  • Hydrogen iodide (HI) is classed as a polar molecule because of its ionic structure. Hydrogen iodide has a tetrahedral or linear-shaped molecular geometry, and the bond angles between iodine and hydrogen are 180 degrees. The electronegativity values of iodine and hydrogen atoms in the HI molecule vary, with the center iodine pulling more strongly than the terminal hydrogen.

  • Iodine and hydrogen, on the other hand, are members of the halogen and hydrogen family groups, respectively, of the periodic table. In the HI molecule, iodine has a higher electronegative value than hydrogen. In the ground state, the HI molecule has a net dipole moment of 1.08D.

  • There are two HI molecular bonds in the HI molecule. In the ground state, it has a completely different dipole moment than in the excited state. Light absorption can occur from either visible or ultraviolet wavelengths.

Transitions between the ground state and the excited state are called pi- to pi-stars and n-to-pi-stars, respectively. The HI molecule has a distinct dipole moment in the excited state energy level. However, it’s a work in progress.


However, the asymmetrical tetrahedral shape of the HI molecule, which contains three lone pairs, prevents them from canceling one other. As a result, the dipole moment is nonzero. The uneven distribution of negative and positive charges gives the HI molecule a nonzero dipole moment.

:eight_pointed_black_star: The Uses Of Hydriodic Acid

When hydrogen iodide - a colorless gas with a pungent odor – is dissolved in water, hydriodic acid is formed as a result. This pale yellow solution of water contains a strong, very corrosive acid as well as a potent reducing agent, both of which are toxic.

During chemical processes, it has the capacity to lose a proton or get it back if necessary. This feature has enabled hydriodic acid to find a variety of applications in chemical-based industries.

:small_red_triangle_down: Catalyst

A catalyst is a substance that speeds up chemical processes within another substance. Because of its high reducing capacity as well as its acidity, hydriodic acid is often employed in the production of acetic acid. Even though acetic acid is hazardous to humans at concentrated levels, it is the fundamental component in the production of vinegar.

It is also often utilized in the manufacture of both organic and inorganic iodide compounds; however, it is one of the most costly catalytic reagents used in this procedure and is hence not widely available.

:small_red_triangle_down: Pharmaceutical Intermediate

It is utilized as a pharmaceutical intermediary in the development of many medications for illnesses such as chronic bronchitis, scrofula, and malarial infections while it is in its syrup form (since the acid is very unstable in this form). Pharmaceutical intermediates are substances that are introduced to a chemical combination in order to cause it to react and transform into a different substance.

:small_red_triangle_down: Nonbeneficial Use

Methamphetamine, an illicit and addictive substance popularly known as “ice” may be made by combining hydriodic acid with red phosphorus and either pseudoephedrine or ephedrine, as well as other ingredients. It is possible to create huge quantities of medicine using hydriodic acid because of its great catalytic capacity, which eliminates the need for sophisticated chemical procedures.

:small_red_triangle_down: Disinfectant

Its strong acidity makes hydriodic acid effective against a wide range of germs and viruses, including bacteria and viruses. It is often employed in the disinfection and sanitization of medical instruments and goods, such as the control items used in the treatment of mastitis, a bacterial problem that affects mothers who feed.


As a reducing agent, it can be used to convert aromatic nitro compounds to anilines, for example. Due to its usage as a reducing agent in the manufacture of methamphetamine from ephedrine or pseudoephedrine, hydroiodic acid is designated as a U.S. Federal DEA List I Chemical (recovered from nasal decongestant pills).

:eight_pointed_black_star: Hypothetical Considerations While Handling Hydriodic Acid

Hypothetical Considerations

This is the sole hypothetical element of the article. This is Argox’s rendition of made-up nonsense. Even my nonsense should be educational.

  • What would the public think of a shop-made HI(aq) (Of course, intellect is a factor.) The acid created this way is brown. This is due to HI being oxidized to I2 in the condenser (4HI + O2 = 2I2 + 2H2O) and KI impurities.

  • The brown hue is minimal and has no effect on the acid’s effectiveness. Commercial HI(aq) is transparent yellow and contains a reducing agent, generally hypophosphorous acid. If you utilize this article for anything other than theoretical purposes, the issue of off-color may come up.

  • But, again, theoretically, I would advise education above stabilization. In a hypothetical user’s application, unstabilized shop-made HI(aq) will work as well as store-bought. A simply aesthetic distinction. Adding red phosphorous and heating filthy brown acid makes it clear yellow. But! But wait! Isn’t that what a user might do? Heating RP with it? Explain this to anybody. Show them in a test tube. Persuade. Hypothetically.

  • If the hypothetical user overcomes their first apprehension, don’t be shocked if the hypothetical user knocks on your door late at night, pleading for more hypothetical acid. The news may spread, and the all-request queue may grow interminable. Of course, none of this is real all it’s hypothetical. OK, I made it up.

  • Also, because this is all hypothetical, I wouldn’t want to be tied to a specific bottle, if you’re smart enough to produce acid, you can figure out where it goes. HI(aq) weights precisely 1,700 grams per liter. If the hypothetical user gets into a manufacturing frenzy, consider black HDPE jerrycans.

Without a stabilizer, HI progressively decays to I2. But, as I mentioned, no worries: the hypothetical user’s program would address the issue. If you’re smart enough to pay attentively and hypothetically decide to produce some hypothetical acid, you’ll find out all sorts of other valuable methods and shortcuts.


HI(aq) must be shielded from light and stored away from humans in a cool (temperature and otherwise). I wouldn’t freeze it, but I can’t say what would happen if I did. But the acid will progressively degrade over time.

:eight_pointed_black_star: Everything You Need To Know About Hydroiodic Acid

Hydroiodic Acid

:small_red_triangle_down: Hydroiodic Acid Formula

Hydroiodic acid is the name given to the aqueous solution of hydrogen iodide, and it is the most acidic of the hydro halides in terms of pH.

:small_red_triangle_down: Formula And Structure:

Hydroiodic acid (aq. hydrogen iodide) has the chemical formula HI, which stands for hydroiodic acid. The molar mass of this compound is 127.91 g/mol. In its gaseous state, hydrogen iodide (HI) is present, whereas hydroiodic acid (HI) is present as an aqueous solution in water. They can both be used interchangeably.

Because of the electronegativity of the iodide, hydrogen iodide has a polarizing appearance. In part, this is due to the huge size of the I ion, which causes the negative charge to be distributed, resulting in a weaker hydrogen-ion bond. As a result, HI is a stronger acid than HCl, HBr, and HF, owing to the easy dissociation of the H+.

:small_red_triangle_down: Preparation:

When hydrazine and iodine (I2) react, they generate hydroiodic acid and nitrogen gas. This acid is commercially accessible.

2 I2 + NH2NH2 → 4 HI + N2

Hydroiodic acid can also be made by bubbling hydrogen sulfide gas through an aqueous solution of iodine, as described above.

H2S + I2 → 2 HI + S

HI is distilled at the conclusion of the process to yield hydroiodic acid at the amounts needed.

:small_red_triangle_down: Physical Properties:

In its gaseous form, hydrogen iodide has no color and has an unpleasant odor; nonetheless, it is highly soluble in water, resulting in the formation of hydroiodic acid. “Concentrated” hydroiodic acid is typically 48-57 percent hydroiodic acid when dissolved in water.

An aqueous solution with high concentrations of HI molecular element has certain physical features (boiling point, melting point, and density that are dependent on this concentration.

:small_red_triangle_down: Chemical Properties:

Hydroiodic acid is a powerful and reactive acid with a short half-life. Because of its high level of reactivity, it should be handled with caution. It has the potential to react severely with metal powders, ammonia, and other substances, resulting in fires and explosions.

:small_red_triangle_down: Uses:

One of the most prevalent applications of HI is the formation of alkyl iodides, an important class of organic compounds, by reacting HI with alkenes or primary alcohols, which is one of the most popular applications of HI. Hydroiodic acid is also often used as a reducing agent in a variety of industrial applications.

:small_red_triangle_down: Health Hazards:

The inhalation of HI gas is poisonous, and it is extremely irritating to the skin, eyes, and mucous membranes. When breathed, consumed, or absorbed via the skin, hydroiodic acid can cause severe skin burns and eye damage. It is also extremely dangerous when swallowed.


HI is very corrosive, and it interacts violently with acids and bases. In addition, when heated, HI decomposes, releasing hazardous gases, and when exposed to air, HI oxidizes fast. Long-term exposure to low amounts of a substance can also have negative health consequences.

Frequently Asked Questions - FAQs

People asked many questions about hydroiodic acid lewis structure. We discussed a few of them below:

:one: What use does hydroiodic acid have?

When it comes to chemical processes, hydriodic acid is most typically utilized as a catalyst or reducing agent. It is commonly used to disinfect and sanitize medical instruments and goods because of its high acidity, which allows it to destroy a variety of bacteria and viruses. Hydriodic acid is commonly used to disinfect and sanitize medical items and products.

:two: Is hydroiodic acid harmful to the body?

In contact with Hydriodic Acid, which is a CORROSIVE CHEMICAL, the skin and eyes can be badly irritated and burned, with the possibility of permanent eye damage. It is possible to become irritated by breathing Hydriodic Acid in large quantities. * Breathing Hydriodic Acid may cause irritation of the lungs, which can result in coughing and/or shortness of breath in certain people.

:three: Is hydrogen referred to as H2 or H?

Despite the fact that it is the most plentiful element in the universe, hydrogen only has an atomic number of one. The molecular formula for hydrogen is H2. Hydrogen has a molar mass of one and has the molecular formula H2. Hydrogen, abbreviated as H, is the lightest element and has atomic number one. A colorless, odorless, and tasteless gas having the chemical formula H2, it is extremely combustible and has no odor or flavor.

:four: Why is hydroiodic acid (HI) referred to as such?

In its gaseous state, hydrogen iodide (HI) is present, whereas hydroiodic acid (HI) is present as an aqueous solution in water. They can both be used interchangeably. A simple diatomic molecule with the following structure is known as HI: Because of the electronegativity of the iodide, hydrogen iodide has a polarizing appearance.

:five: Is hydroiodic acid a conductor of electricity?

By dipping the PEDOT: PSS film in HI, it was possible to manufacture a highly conductive PEDOT: PSS film. At 550 nm, the film has a sheet resistance of 68 / and a transmittance of 87 percent, making it an excellent choice for solar panels.

:six: What is the process through which hydroiodic acid is produced?

When hydrogen iodide - a colorless gas with a pungent odor – is dissolved in water, hydriodic acid is formed as a result. This pale yellow solution of water contains a strong, very corrosive acid as well as a potent reducing agent, both of which are toxic. During chemical processes, it has the capacity to lose a proton or get it back if necessary.

:seven: Is hydroiodic acid an electrolyte with high ionic strength?

Strong acids totally disintegrate into their ions when they come into contact with water, whereas weak acids only partially dissociate. All of the other acids are ineffective. Hydrochloric acid, nitric acid, sulfuric acid, hydrobromic acid, hydroiodic acid, perchloric acid, and chloric acid are examples of powerful acids.

:eight: Which of the following acids is the most potent?

Currently, none of the strong acids that are often included in a chemical textbook claims the title of “World’s Strongest Acid.” The previous record-holder was sulfuric acid (HFSO3), but the superacids are hundreds of times stronger than sulfuric acid and more than a million times stronger than concentrated sulfuric acid.

:nine: When it comes to hydrogen, what is the Lewis Structure?

Because it only has one valence electron, the hydrogen atom is represented by the symbol H. Molecular structures that are bound together by covalent bonds can be represented as Lewis electron-dot structures, which can be drawn on graph paper.

:keycap_ten: Is HI a polar molecule or a nonpolar molecule?

Iodine (hydrogen iodide) (HI) Please take note of the symmetry of the molecule: When divided, the top and bottom halves, as well as the left and right portions, are not mirrored reflections of one another. So HI lewis’s structure is polar or non-polar. One may also tell that the molecule is polar because the link between the two atoms is polar.

:closed_book: Conclusion

One iodine and one hydrogen atom make up hydrogen iodide. Lewis structure depicts a molecule or ion’s valence electrons as bond pairs or lone pairs. Dots indicate electrons. 1 dot = 1 electron A bond pair has two dots, a lone pair has two. Iodine and hydrogen are in the 17th and 1st family groupings, respectively. Iodine has seven valence electrons whereas hydrogen has one. The HI molecular geometry diagram shows the number of valence electrons and bond electron pairs in the HI molecule. The HI molecular geometry has one H-I single bond. It keeps the tetrahedral geometry after joining one hydrogen atom and three lone pairs of electrons on the iodine atom.

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