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Why Acetaldehyde is more soluble than Formaldehyde in water !

Why Acetaldehyde is more soluble than Formaldehyde in water ! 

Grade:12

2 Answers

Ramreddy IIT Patna
askIITians Faculty 49 Points
7 years ago
There is no H-bonding in both Acetaldehyde and Formaldehyde. So solubility depends on the vanderwaals forces of attractions which are proportional to molecular weight of compounds. Since MW of CH3CHO is higher than HCHO, vanderwaals attractive forces are more inCH3CHO , and hence its solubility is high.
Navdeep Kumar
33 Points
7 years ago
@ramreddy sir , but then why Propanal is less soluble than Ethanal ?
Also, in most of the texts we found that solublitity is inversely prop. to Hydrophobic(Alkyl) Part Conc. … 

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