Which sequence of acid and base addition would efficiently extract a weak base from an organic solvent?

If a compound has a low pKa, what does this imply about its acidity and solubility in polar solvents?

What is the primary reason for the formation of separate aqueous and organic layers in a separatory funnel?

Which base would be most effective in converting acetic acid to acetate ion in an organic layer?

Given a compound with a pKa of 4.5, which solvent would most likely increase its solubility by ion formation?

During an extraction, pH strips indicate neutrality, yet the reaction seems incomplete. What could be a potential reason?

A compound with a pKa of 8.5 is placed in an aqueous solution with pH 6. What can be predicted about its solubility?

How do pKa values relate to the acidity and potential extraction behavior of a compound?