In thisarticle, we are going to learn about carbon dioxide (CO2) Lewis dot structure,molecular geometry, hybridization, molar mass, and also many other elements of CO2in complete details.

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We willguide you come clear every doubt and also misunderstanding for what you space here. So,without wasting your time, let’s start…

Carbondioxide which chemistry formula is CO2 is a colorless gas discovered on the earth’satmosphere together a trace gas.The CO2 molecule is a triatomic molecule in i beg your pardon carbon is covalently dual bondedwith oxygen ~ above both sides wherein bond size is around 116.3 pm.

Carbondioxide is widely supplied in the food industry, oil industry, chemistry industry, biologicalindustry, and also many more. Most generally it is offered as a fire extinguisher in dailylife. It has actually a direct and really close connection with person as us emission CO2after intake of O2.


CO2 Lewis Structure

CO2 has a complete of 16 valence electrons (carbon has actually 4 and also two oxygen have 12) which room structured as O=C=O. Both oxygen and carbon atoms need 8 electron to complete octet in your outermost shells.


Here both oxygen atoms share two-two electrons through the carbon atom to type two double bonds (O=C) i m sorry can also represent by just placing 4 dots because that a twin bond as presented in the over figure.

Steps come be followed for illustration CO2 Lewis structure

1. Discover out the total number of valence electrons

CO2 is made up of two different atoms: Carbon (C) and Oxygen (O) for this reason first, us should number out the valence electrons of these two atoms separately.

Valence electrons of carbon atom = 4

Valence electron of oxygen atom = 6

Here in this molecule, we have one carbon atom and two oxygen atoms. Now,

Total variety of valence electrons: 4 + 6*2 = 16.

2. Determine the total variety of valence electrons pairs

As we understand the total variety of valence electrons room equal come the addition of sigma bonds, pi bonds, and also lone pair present at the valence shells. But it deserve to be simply calculated by just separating the total variety of valence electrons by two.

For CO2, total valence electrons space 16 (as calculated in step 1), so complete electrons pairs are 16/2= 8.

3. Find out the central atom

Finding the central atom while illustration a Lewis structure is just one of the trickiest parts however as defined in exactly how to attract a Lewis framework guide, over there is a basic trick for choosing the main atom which is obviously conserving extra time and energy.

The carbon atom is in the the very least number so merely it will certainly be the central atom centralized by 2 oxygen atoms from one of two people side.

4. Drawing a simple skeleton


As us have already known the central atom so we have the right to easily attract a an easy structure placing a carbon atom in the facility surrounded by 2 oxygen from one of two people side. The skeleton watch like displayed in the over diagram,

5. Placed the lone bag of electrons on atoms


It is time to placed lone pairs of electron on atoms. For this, you should make sure every atom other than the central atom must have 8 electron to monitor the octet rule (hydrogen is one exception because it follows duplet rules).

Place 6 electron (three lone pairs of electrons) on each carbon atom and also 4 electron (two lone pairs of electrons) ~ above the carbon atom.

We supplied all 16 valence electrons. Now inspect whether every atoms are completing octet or no on their external shell, no castle aren’t. Let’s examine by sharing one lone pair that electrons yet again failure to finish the octet. So, let’s share 2 pairs of electrons between both Carbon and also Oxygen. Here we walk each atom have actually now 8 electron on the outermost shell which fulfills their octet.

6. Identify formal fee on the atom

The formal charge on each atom have the right to be calculation as,

Formal fee (F.C) = Valence electrons (V) – Lone pair of electrons (L) – shortcut pair of electrons (B)/2.

From this, we get no charge on the molecule. Finally, this is ours CO2 Lewis structure diagram.


CO2 molecular Geometry & Shape

In a CO2 molecule, the carbonatom is in the center dual bonded through two oxygen atom by every side. Both oxygenatoms have actually two lone bag of nonbonding electrons present and also the central carbonatom has no lone pairs of nonbonding electron present.

The existence of very same atoms oneither side of the central carbon atom nullifies the charge circulation becauseof the symmetrical structure. Thus, CO2 has a straight molecular geometry.

I)Electron Domain (ED) Geometry

From the over Lewis dot structure, CO2 has actually only two regions ofelectron density approximately the central carbon atom because no lone pair ofelectrons presence of carbon atom.


Bothoxygen atoms have two lone pair of electrons presence however due to thesymmetrical structure, the effects of lone pairs are canceled which outcomes in alinear geometry that CO2, no bent or angular.


According toVSEPR theory, there is a complete of 16 valence electron in i m sorry C contributes4 electrons and also two O add 12 electrons.

From the Lewis structure of Carbon, we understand that there room not anylone pair that electrons existence on carbon.

Also, four pairs of electrons participate in the 2 C=Oformations that showthere room a full of 4 pairs of electron pairs existing whichforms 2 sigma bond.

But the results of lone pairs of oxygen atoms space nullified because of thesymmetrical structure, the CO2 molecule acquires linear molecular geometry andhas a straight shape.

Per the VSEPR model, a simple triatomic Molecule prefer CO2 has a structureAX2 and also no lone pair of electrons, we think about two chemistry bonds to extend inopposite directions, developing a straight molecule.

CO2 link Angle

As the molecule geometry the the CO2 is direct andarrangement choose O=C=O which reasons the bong angle of CO2 i do not care 180°. Theplaner shaped geometry also known as direct geometry’s molecules have actually always180°bond angle.

CO2 Hybridization

CO2 has an sp hybridization type. The central carbon atom has actually tworegions that room responsible for identifying hybridization. Right here C has onlytwo sigma bonds and also no lone pairs of electrons. And due come these 2 regionsaround the central carbon atom, CO2 has actually sp hybridization.

According to the VSEPR theory, we deserve to identify the hybridizationof any type of atoms based on their steric number (SN) i beg your pardon is offered as,

Steric Number (SN) =total number of lone bag + number of atoms directly attached through the atom.

If the steric number is 2atoms have sp hybridization, if SN is 3 it will be sp2 hybridization, and also so on…

In the situation of CO2, The carbon atom has actually no lone pair the electrons but the C atom is fastened to two otherO atoms. So, the steric number of C atom will certainly be 2 and also it has actually sp hybridization.

But oxygen atoms have actually sp2hybridization because oxygen atom’s steric number is 3 as result of two lone pair andattached atom i m sorry is carbon.

Now together per hybridizationrules, the hybridization that the whole molecule should be chose upon the centralatom and carbon is the central atom in CO2 molecule so that CO2 molecule has actually sphybridization.

We can also find the end hybridization of the molecule directly withthe assist of a basic formula. The calculation is showing below,

Hybridization = ½


V.E = total no. The valence electron presence central on themolecule

M = Total number of monoatomic atoms bonded to the main atom

C = Cation fee (positive charge)

A= Anion charge (negative charge)

Now, on the above hybridization formula, we need to putcorresponding values to attain CO2 hybridization.

Hybridization of CO2 = ½ < 2+2+0> = 2

= sp

CO2 Molar Mass

Molar massive (M) the anymolecule is identified as the full sum that the fixed of every atom in the moleculesin grams every mole. Molar mass is additionally known as molecular weight. Basically, itis a physical home that is the division of the given substance to the amountof substance. That unit is grams per mole.

Molar mass can be calculatedby using this basic formula,

Molar fixed = Grams/mole

Calculate the molar fixed ofCO2:

To calculation the molar massof CO2, first, we have actually to discover out the molar fixed of Carbon and Oxygen which are12.011g/mol and 16 g/mol respectively.

In CO2, there space onecarbon atom and two oxygen atoms. So, the molar mass of CO2 is equal to (1*12.011g/mol + 2*16 g/mol) = 44.011 g/mol.

CO2 mountain or Base

CO2 (Carbon dioxide) is taken into consideration as a Lewis acid due to the resonance structure the CO2 which means it have the right to accept a lone pair the electronsfrom Lewis bases which room electron donors.

According come the Bronsted-Lowry acid-base definition, moleculesthat accept electrons space acids and also those which are donated electrons space bases.So, it is taken into consideration a Bronsted acid.

When CO2 is liquified in water (H2O), the reaction takes place betweenLewis donor (H2O) and CO2 which provides carbonic mountain (H2CO3). But it is in theform that H+ and also HCO3- in equilibrium condition since H2CO3 is a very weak acidcapable that dissociating H+ ions in a reversible form. This is also a very well-knownexample Le-Chatelier principle. You have the right to see the totality reaction mechanism in the below example no. 1.

There is additionally another concept that defines why CO2 is mountain on shortcut formation. The central carbon atom is attached which double bonds withoxygen. Thus, pi electrons acquire shifted come terminal electronegative atom causesit renders a vacant orbit with central atom since a Lewis basic (OH-) caneasily donate lone pair of electrons to the central atom (C).

SO2 and CO2 space the ideal examples that these varieties of Lewis acids.

Here are few of the example reactions which display CO2 (Carbondioxide) is one acid:

1. CO2 (aq.) + H2O (l.)H2CO3 (carbonic acid)H+ (free hydrogen ion) +H2CO3- (bicarbonate ion)

CO2 Polar orNonpolar

Carbondioxide (CO2) is a nonpolar molecule in spite of two C and O bonds room polar. Thisis since the molecule geometry the CO2 is linear and also is arrangedsymmetrically so that the dipole fees on either side gain cancel which outcomes in a network dipole moment is zero.

Because ofnet dipole charge of CO2 molecule is zero, there space not any polarity results onmolecule despite the visibility of 2 Carbon and oxygen polar bonds.

You deserve to readmore around this certain topic independently in brief on our other post which namedPolarity that CO2.


Carbondioxide (CO2) has a full of 16 valence electron which present on the outershell of atoms i.e. 4 carbon atoms and 12 of 2 oxygen atoms. Indigenous this wecan easily attract the Lewis period diagram of CO2 through adjusting two twin bondsbetween carbon and also oxygen (O=C=O).

The molecule geometry of CO2 is direct with a bond edge of 180°because the dipole charges room canceled by each various other as molecule is symmetrically arranged. Back both C=Obonds space polar however the whole molecule is nonpolar in nature.

When CO2 isdissolves in water, the produces H+ ions in the kind of carbonic acid so thatits reflects acidic behavior and considered together an acid.

Point come BeRemember

These aresome that the crucial points of the whole write-up which are really important andcovered every the necessary information about the CO2 molecule. So, if you want, youcan keep in mind this for fast remembrance.

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CO2 has actually atotal the 16 valence electrons (carbon has actually 4 and also oxygen 6 valence electrons).CO2 has actually alinear molecular geometry v a bond edge of 180°on a plan.Molar massof CO2 is 44.01 g/mol which is likewise known as molecular weight.Carbondioxide has an sp hybridization kind because the steric number of central carbon is2. Carbon dioxide is a polar molecule however both C=O bonds room polar bonds.CO2 isconsidered as an acid because on dilution which water that produces cost-free hydrogenions.