The principal reason for the extremely low solubility of NaCl in benzene (C6H6) is the __________.
- strength of the covalent bond in NaCl
- hydrogen bonding in C6H6
- increased disorder due to mixing of solute and solvent
- strong solvent-solvent interactions
- weak solvation of Na+ and Cl- by C6H6
Answer: weak solvation of Na+ and Cl- by C6H6.