$9-25.$ Consider solutions prepared by

$($a$)$ dissolving $8\mathrm{.}00$mmol of NaOAc in $200ml$ of $0\mathrm{.}100$MHOAc.

$($b$)$ adding $100mL$ of $0\mathrm{.}0500$MNaOH to $100mL.$ of $0\mathrm{.}175$MHOAc.

$($c$)$ adding $40\mathrm{.}0mL$ of $0\mathrm{.}1200MHCl$ to $160\mathrm{.}0mL$ of $0\mathrm{.}0420$MNaOAc;

In what respects do these solutions resemble one another? How do they differ?