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Which compound is the most soluble in water? chloroethane,ethanol,ethanal,ethylene glycol

Which compound is the most soluble in water?

chloroethane,ethanol,ethanal,ethylene glycol
 

Grade:12th pass

5 Answers

Rituraj Tiwari
askIITians Faculty 1792 Points
3 years ago
dear student,

Among given compounds, ethylene glycol ( ) is the most soluble in water. Ethylene glycol has two hydroxy groups both of which form hydrogen bonds with water. Greater is the number of hydrogen bonds, greater is the extent of hydrogen bonding and greater is the solubility in water.

thank you.
Ayesha Mallick
17 Points
3 years ago
Ethylene glycol is most soluble in water. Because it has 2 -OH groups that can form H bonding with water. Hence more H bonding leads to more solubility in water.
ankit singh
askIITians Faculty 614 Points
3 years ago
Since 2 hydroxyl groups are present in ethylene glycol, it will form the maximum no. of hydrogen bonds with the water molecules and hence, will be more soluble as compared with others. So, we can conclude that the answer to this question is D. Ethylene glycol.
Sowmiya
59 Points
2 years ago

Let’s start with the basic concept of hydrogen bonding; hydrogen bond is a dipole-dipole attraction between two molecules. It is not a covalent bond with hydrogen. It mainly happens between hydrogen and highly electronegative atoms such as nitrogen (N), oxygen (O) and fluorine (F).

The electronegativity goes like

F > O > NClF > O > N≈Cl

, with fluorine be most electronegative followed by oxygen then nitrogen and chlorine.

Hydrogen bonding can be intermolecular (between two different molecules) and intramolecular (in the same molecule itself) both, the example of intramolecular are ortho nitrophenol and boric acid.

Higher the number of hydrogen bonds formed between water and another covalent molecule, more the molecule soluble in water.

Now, we have a basic understanding of hydrogen bonding. Let’s write the molecular formula of these four

Chloroethane: ClH2C  CH3Chloroethane: ClH2C − CH3

Ethanol: CH3 CH2  OHEthanol: CH3− CH2 − OH

 

Ethanal: CH3 CHOEthanal: CH3− CHO

Ethylene glycol: OH  CH2 CH2 OHEthylene glycol: OH − CH2− CH2− OH

 

The maximum no. of hydroxyl group in ethylene glycol is 2. Since 2 hydroxyl groups are present in ethylene glycol, it will form the maximum no. of hydrogen bonds with the water molecules and hence, will be more soluble as compared with others.

 

So, we can conclude that the answer to this question is D. Ethylene glycol.

Vikas Amritiya
askIITians Faculty 230 Points
one year ago

Among given compounds, ethylene glycol (HOCH2CH2OH ) is the most soluble in water. Ethylene glycol has two hydroxy groups both of which form hydrogen bonds with water. Greater is the number of hydrogen bonds, greater is the extent of hydrogen bonding and greater is the solubility in water.

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