alchols solubility

[mindblowing]

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what type of alchols are more soluble ? primary or secondary?
also long chain or short chain(CH30H OR CH3CH20H)???////



THANKS😕

 

[bigstix808]

what type of alchols are more soluble ? primary or secondary?
also long chain or short chain(CH30H OR CH3CH20H)???////



THANKS😕

short-chain primary is most soluble because there is the greatest chance of H-bonding due to polarization (-OH). the longer the chain gets, the less likely that H-bonding will take place (more -CH3's displace the -OH groups and prevent H-bonding). the addition of more -CH3's will also make that molecule less polar and as you should know water is VERY polar. like dissolves like.

given the same molecular weight, primary is better dissolved in water because secondaries have a tendency to H-bond within itself and not the water around it. secondary also tends to not be as polar as primary.

 

[Hope2007]

what type of alchols are more soluble ? primary or secondary?
also long chain or short chain(CH30H OR CH3CH20H)???////



THANKS😕

Assume that alcohol is soluble in water (polar) solvent:
1. Primary alcohol is more soluble then secondary.
2. short chain (CH3OH) is more soluble than long chain
Explain: Increased solubility due to increase H-bond between water and hydroxy group group(hydrophilic) of an alcohol. The Carbon chain of alcohol is hydrophobic (water-dislike). Thus, increasing the carbon chain will increased the hydrophobic interaction and become less soluble.
Polar-like-polar: primary alcohol is more polar then secondary, who is more polar then tertiary secondary. Hope this helps!! 🙂

 

[mindblowing]

thank you so much for taking out time and answeing my question.....

 

[Hope2007]

Assume that alcohol is soluble in water (polar) solvent:
1. Primary alcohol is more soluble then secondary.
2. short chain (CH3OH) is more soluble than long chain
Explain: Increased solubility due to increase H-bond between water and hydroxy group group(hydrophilic) of an alcohol. The Carbon chain of alcohol is hydrophobic (water-dislike). Thus, increasing the carbon chain will increased the hydrophobic interaction and become less soluble.
Polar-like-polar: primary alcohol is more polar then secondary, who is more polar then tertiary 🙂

 

[cdmOMR]

I think its important to note that 1*>2*>3* is only completley true when you are comparing entities with like number of carbons. ie Isopropanol is more polar/soluble than a long chain 1* alcohol