Solubility of organic compoundsWatch
For a substance to be soluble in water, does it have to be able to form hydrogen bonds or can it be soluble even though it only has van der waals and dipole dipole attractions?
eg: two polar molecules will generally be soluble as they have permanent dipole-dipole forces exist between the H atoms with the Cl and Na with O as in NaCl and H2O.
Thats because halogenoalkanes are likely to have stronger van der waals forces between them unless it is a branched halogenoalkane.
1. There are bonds between liquid A molecules
2. There are bonds between liquid B molecules
3. There are bonds between liquid A and liquid B molecules
For something to be soluble it has to form bonds strong enough to disrupt the bonding in the two pure phases, otherwise each component keeps itself to itself.
Haloalkanes can form polar bonds to ethanol which are strong enough to disrupt the H-bonding in ethanol, but its weak polar bonding to water is not strong enough to disrupt the stronger H bonding in water.