Learning Activity $16\mathrm{.}3.$ You will currently be given actual chemical compounds with their respective pKa values and chemical structures. Determine the buffering range, tell whether the compounds are water$-$soluble or lipid$-$soluble, and also tell whether their forms are reabsorbed in the renal tubules or excreted together with the urine based on their structures shown below. Do this in $30$ minutes. After the allotted time, class sharing and discussion shall follow.

$\backslash$table$[[$Drugs & Description,pKa,Solubility,$\backslash$table$[[$Renal Tubular$],[$Effect$]],$Buffering Range$],[\backslash$table$[[$Ephedrine$],[($brain stimulant$)]],9\mathrm{.}6,,,],[\backslash$table$[[$Ampicillin$*],[($antibiotic$)]],2\mathrm{.}5,,,],[\backslash$table$[[$Allopurinol$],[($anti$-$hyperuricemia$)]],9\mathrm{.}4,,,],[\backslash$table$[[$Methotrexate$*],[($antineoplastic$)]],4\mathrm{.}8,,,],[\backslash$table$[[$Ibuprofen$*],[($anti$-$inflammatory$)]],4\mathrm{.}4,,,],[\backslash$table$[[$Ethacrynic acid$*],[($diuretic$)]],2\mathrm{.}5,,,],[\backslash$table$[[$Lidocaine$],[($anaesthetic$)]],7\mathrm{.}9,,,],[\backslash$table$[[$Strychnine$],[($pesticide$)]],8\mathrm{.}0,,,],[\backslash$table$[[$Warfarin$*],[($blood thinner$)]],5\mathrm{.}0,,,],[\backslash$table$[[$Tolazoline$],[($vasodilator$)]],10\mathrm{.}6,,,]]$

NOTE: Those with $()$ are weak bases.