$9.$ That mysterious absorption factorwhat's its secret?

a$.$ How does tweaking this factor change the game for solvent usage?

b$.$ Is there a point where messing with it doesn't do much anymore?

c$.$ How do real$-$world complications make the ideal absorption factor an elusive beast?

$10.$ The dance of gas and liquid in a packed columngetting them to move together just right.

a$.$ What's the trick to getting the gas and liquid to mingle effectively?

b$.$ How do you know when they're not getting along, based on what you see in the column's performance?

c$.$ Is there a way to adjust their interaction on the fly, or are you stuck with what you've got?

$11.$ The balance act of the operating line and the equilibrium curve in stage design.

a$.$ How does this dynamic duo guide the design from start to finish?

b$.$ What signals a mismatch between the operating line and the equilibrium curve, and how do you fix it$?$

c$.$ Can the shape or slope of these lines give away secrets about the process efficiency?

$12.$ When the liquid film demands attentionbalancing act with the gas film.

a$.$ What shifts the spotlight to the liquid film in the absorption process?

b$.$ How does prioritizing the liquid film alter the column's requirements?

c$.$ Are there situations where the liquid film just can't be ignored?