$8)$ After Kent has collected his fractions from the column, what is the last thing he needs to do to get his compounds back as solids?

a$)$ run a TLC

b$)$ recrystallize the solids

c$)$ remove the solvent by rotavap $($rotary evaporator$)$

d$)$ check them by melting point

$10)$ If Kent wanted to get rid of the compound that would be left on the baseline before the column, he could:

a$)$ extract with NaOH

b$)$ extraction with NaHCO$3$

c$)$ extract with HCl

d$)$ there is nothing he could do