- Joined
- Apr 29, 2011
- Messages
- 2,171
- Reaction score
- 863
TBR OChem page 215 #64
TBR says that at the pI, the amino acid exists primarily as a zwitterion (NH3+, COO-). That means it has two charged ends but the overall charge is zero.
Because the overall charge is 0, the zwitterion will mostly dissolve in the organic layer in an extraction.
Why don't the charges matter? I get that the OVERALL charge is neutral but it seems to me that something with charged ends should be somewhat soluble (as in, non-negligent amount) in the aqueous layer.
Using this logic, would a molecule with 9999 positive charges, and 9999 negative charges be LESS soluble in aqueous layer than a molecule with a single positive charge?
TBR says that at the pI, the amino acid exists primarily as a zwitterion (NH3+, COO-). That means it has two charged ends but the overall charge is zero.
Because the overall charge is 0, the zwitterion will mostly dissolve in the organic layer in an extraction.
Why don't the charges matter? I get that the OVERALL charge is neutral but it seems to me that something with charged ends should be somewhat soluble (as in, non-negligent amount) in the aqueous layer.
Using this logic, would a molecule with 9999 positive charges, and 9999 negative charges be LESS soluble in aqueous layer than a molecule with a single positive charge?