The lower alcohols are soluble in water but as the number of alkyl groups increases or as the molecular mass increases the solubility decreases. … MSo we can say that lower alcohols are soluble in water due to the formation of hydrogen bonding with the water molecule. Hence the correct answer is option (D).
Why are lower alcohols soluble in water?
The −OH group in alcohols is polar and forms hydrogen bonds with water which results in solubility of alcohols in water. Lower alcohols have less carbon atoms than that of higher alcohols. … of hydrocarbon chains which results in more steric hindrance to make bonds which result in less solubility.
Why the higher members of alcohols are less soluble than lower members of alcohol in water?
Alcohols with higher molecular weights tend to be less water-soluble, because the hydrocarbon part of the molecule, which is hydrophobic (“water-hating”), is larger with increased molecular weight.
Why low molecular mass alcohols are soluble in water?
Solubility of alcohols and phenols in water is due to their ability to form hydrogen bond with water molecule. … Alcohols with lower molar mass will have smaller hydrocarbon part and therefore tendency to form hydrogen bonding is more and they are more soluble in water.
Why smaller alcohols are soluble in water would alcohols having longer alkyl groups be completely soluble in water?
Propanol has limited solubility. The longer the alkyl chain, the less should be the aqueous solubility. … Well, the longer the chain the less water like the solvent, and the more dispersion forces between alkyl chains. As a physical scientist you should look up a table of alcoholic solubilities in water.
What alcohols are not soluble in water?
The longer-chain alcohols – pentanol, hexanol, heptanol, and octanol – are increasingly non-soluble. What is happening here?
Are lower alcohols soluble in water?
The lower alcohols are soluble in water but as the number of alkyl groups increases or as the molecular mass increases the solubility decreases. We know that the solubility of alcohols in water is due to the formation of hydrogen bonds with water.
Are all alcohols soluble in water?
Alcohols are slightly or relatively soluble in water. Generally, alcohols tend to form hydrogen bonds with water due to the hydroxyl group which is often referred to as a hydrophilic (water-loving) group.
Which alcohol is most soluble in water?
Because of the strength of the attraction of the OH group, first three alcohols (methanol, ethanol and propanol) are completely miscible. They dissolve in water in any amount.
Alcohol solubility chart.
Which is more soluble phenol or alcohol?
Alcohols contain an OH group in which a hydrogen atom is attached to the electronegative oxygen atom, due to which it is capable of forming hydrogen bonds with the water molecule leading to greater solubility of alcohol in water. … Thus ethanol is more soluble in water compared to phenol.
Why is phenol acidic than ethanol?
The acidic substance has the tendency to produce H+ ion when dissolved in water. Both phenol and ethanol weak acid. However, the acidity of phenol is more than that of ethanol. This is because after losing a proton, the phenoxide ion undergoes resonance & gets stabilized whereas ethoxide ion does not.
Why alcohols and ethers of comparable molecular mass have?
Explain why alcohols and ethers of comparable molecular mass have different boiling points ? Answer: Alcohols undergo intermolecular H-bonding and hence exist as associated molecules. … As a result, ethers exist as discrete molecules which are held only by weak dipole-dipole attractions.
Is octanol polar or nonpolar?
The hydroxy-group of octanol is indeed hydrophilic (polar), but the majority of the molecule wants to stay in the non-polar phase.
Which is more soluble in water ethyl alcohol or dimethyl ether?
In dimethyl ether, the hydrogen atom is not bonded to the electronegative atom instead it is bonded to a carbon atom. Thus, hydrogen bonding is not possible in dimethyl ether. Thus, ethyl alcohol is more soluble in water than dimethyl ether because alcohol contains hydrogen bonding.
Do ethers have higher boiling points than alcohols?
(For more information about hydrogen bonding, see chemical bonding: Intermolecular forces.) Because ether molecules cannot engage in hydrogen bonding with each other, they have much lower boiling points than do alcohols with similar molecular weights.
Are ethers soluble in water?
Ethers can form hydrogen bonds to water, since the oxygen atom is attracted to the partially-positive hydrogens in water molecules, making them more soluble in water than alkanes.