CH $14$ WS E Titration Curves Name Ruth andrews Realis The titration curve of $25\mathrm{.}00mL$ of $0\mathrm{.}180M$ propionic acid with $0\mathrm{.}135$MNaOH. $HAs{O}_2=$ HataO. Hecutle or acieric aleit Michtion$-$ berylliam $2.$ Horthero, Alcricucite Herthe Hal $H_x=$ Q$.$ Foctured $CH12235\mathrm{.}3x$ a$.$ What is the initial $pH$ before any amount of the NaOH solution has been added? $K_a=1\mathrm{.}3{10}^{-5}$ for propionic acid. Ans: $2\mathrm{.}82[H^{+}]=\sqrt[\phantom{2}]{163*[HA]}{H}^t=\sqrt[\phantom{2}]{1\mathrm{.}2{10}^{-5}\text{c}\text{d}\text{o}\text{t}\text{s}180}{H}^{+t}=1\mathrm{.}53{10}^{-3}$ b$.$ Find the