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mars1129 [50]
3 years ago
11

What is the definition of a covalent bond?

Chemistry
2 answers:
kaheart [24]3 years ago
8 0
A chemical bond that involves the sharing of electron pairs between atoms
Anvisha [2.4K]3 years ago
6 0

Answer:

Covalent bond is the type of interaction that is occur by the sharing of electrons pair between the atoms.

Chemical bonding:

“Interactions that account for the association of atoms into molecules, ions, crystals, and other species are called chemical bonding”

Explanation:

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds.  

Types of chemical bonding:

1. Ionic bonding

2. Covalent bonding

3. Coordinate covalent bond/ Dipolar bonding

4. Metallic bonding

5. Intermolecular bonding

On the basis of the strength of chemical bond there are two types of bonding interactions;

• Primary bonding interactions (Strong bonding interactions)

(Ionic bond, Covalent bond and Metallic bond)

• Secondary bonding interactions (weak bonding interactions)

(Dipole-dipole interaction, London dispersion forces and hydrogen bonding)

Covalent Bonding

“Covalent bonding is a type of bonding, in which two or more atoms share valence electrons more or less equally”

 Types of covalent bonding

1. Single covalent bond

2. Double covalent bond

3. Triple covalent bond

The simplest and most common type is a single bond in which two atoms share two electrons. Other types include the double bond, the triple bond, one- and three-electron bonds, the three-center two-electron bond and three-center four-electron bond.

4. Polar covalent bond  

5. Non-Polar covalent bond

Polar covalent bond

A polar covalent bond is a covalent bond with a significant ionic character. This means that the two shared electrons are closer to one of the atoms than the other, creating an imbalance of charge. Such bonds occur between two atoms with moderately different electronegativities and give rise to dipole–dipole interactions. The electronegativity difference between the two atoms in these bonds is 0.3 to 1.7.

Non-Polar covalent bond

In nonpolar covalent bonds, the electronegativity difference between the bonded atoms is small, typically 0 to 0.3. Bonds within most organic compounds are described as covalent.  

Molecules which are formed primarily from non-polar covalent bonds are often immiscible in water or other polar solvents, but much more soluble in non-polar solvents such as hexane.

 


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HCl gas is introduced at one end of the tube, and simultaneously NH3 gas is introduced at the other end. When the two gases diff
4vir4ik [10]

Answer:

When the two gases are mixed, the ammonium chloride precipitates in the tube walls.

Explanation:

This is the reaction:

HCl (g)  +  NH₃(g)  →  NH₄Cl (s) ↓

As the product formed is solid at room temperature, a suspension is first formed in the internal air of the tube that appears as a cloud. Afterwards it finally precipitates into the walls forming a white layer

5 0
3 years ago
The water-gas shift reaction CO(g)+H2O(g)⇌CO2(g)+H2(g) is used industrially to produce hydrogen. The reaction enthalpy is ΔH∘=−4
denis23 [38]

Answer:

To increase the yield of H₂ we would use a low temperature.

For an exothermic reaction such as this, decreasing temperature increases the value of K and the amount of products at equilibrium. Low temperature increases the value of K and the amount of products at equilibrium.

Explanation:

Let´s consider the following reaction:

CO(g) + H₂O(g) ⇌ CO₂(g) + H₂(g)

When a system at equilibrium is disturbed, the response of the system is explained by Le Chatelier's Principle: <em>If a system at equilibrium suffers a perturbation (in temperature, pressure, concentration), the system will shift its equilibrium position to counteract such perturbation</em>.

In this case, we have an exothermic reaction (ΔH° < 0). We can imagine heat as one of the products. If we decrease the temperature, the system will try to raise it favoring the forward reaction to release heat and, at the same time, increasing the yield of H₂. By having more products, the value of the equilibrium constant K increases.

3 0
3 years ago
How does cohesion affect the evaporation rate of water
wariber [46]

Answer:

Evaporation occurs because among the molecules near the surface of the liquid there are always some with enough heat energy to overcome the cohesion of their neighbors and escape. At higher temperatures the number of energetic molecules is greater, and evaporation is more rapid.

8 0
3 years ago
In Fig C, which pair of electrons is the lone pair?
arlik [135]

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bottom right top left fig

5 0
2 years ago
What is the pOH of a 0.025 M [H+] solution? A.0.94 B.1.60 C.12.40 D.13.06
Greeley [361]

Answer:

option C= 12.40

Explanation:

Formula:

pH + pOH = 14

First of all we will calculate the pH.

pH = - log [H⁺]

pH = - log [0.025]

pH = - (-1.6)

pH = 1.6

Now we will put the values in formula,

pH + pOH = 14

pOH = 14-pH

pOH = 14 -1.6

pOH = 12.4

The pOH of solution is 12.4.

6 0
3 years ago
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