$\left(\mathrm{V}_{\mathrm{a}} \mathrm{ml}\right)$ $\left(\mathrm{V}_{\mathrm{s}} \mathrm{ml}\right)$
Millimole $\mathrm{V}_{\mathrm{a}} \times 1$ $\mathrm{~V}_{\mathrm{s}} \times1$
$\mathrm{pH}=4.5$
$\mathrm{pH}=\mathrm{pka}+\log \frac{[\text { salt }]}{[\text { acid }]}$
$4.5=4.2+\log \left(\frac{\mathrm{V}_{\mathrm{s}}}{\mathrm{V}_{\mathrm{a}}}\right)$
$\frac{\mathrm{V}_{\mathrm{s}}}{\mathrm{V}_{\mathrm{a}}}=2$ $.....(1)$
$\mathrm{~V}_{\mathrm{s}}+\mathrm{V}_{\mathrm{a}}=300$ $....(2)$
$\mathrm{~V}_{\mathrm{a}}=100 \mathrm{ml}$
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$C{H_2} = CH{(C{H_2})_8}COOH + HBr\xrightarrow{{peroxide}}....$
$\sigma \,\,1{s^2}\,\,{\sigma ^*}\,\,1{s^2}\,\sigma \,\,2{s^2}\,{\sigma ^*}\,2{s^2}\,\,\sigma \,2p_x^2\,\left\{ {{}_{\pi \,2p_z^2}^{\pi \,2p_y^2}} \right.$
Its bond order is
$n-$propyl bromide $\xrightarrow{{Na}}(A)\xrightarrow[{A{l_2}{O_3}/773\,K}]{{Cr{O_3}}}(B)\xrightarrow[{500\,K}]{{C{l_2}/UV}}(C)$
$n-$propyl bromide $\xrightarrow{{Na}}(A)\xrightarrow[{A{l_2}{O_3}/773\,K}]{{Cr{O_3}}}(B)$ $\xrightarrow[{}]{{C{H_3} - Cl/AlC{L_3}}}(D)\xrightarrow{{C{l_2}/hv}}(E)$