A) 1.2
B) 2
C) 2.5
D) 5.7
Correct Answer: C
Solution :
Perlon is also known as nylon 6, and nylon 6 is a polymer of caprolactum. \[m=\frac{\Delta {{T}_{b}}}{{{K}_{b}}}=\frac{-\,0.06}{-1.86}\,\,=\,\,3.2\times {{10}^{-\,2}}\,\,=\,\,0.032\] \[\therefore \,\,\,Total particles =\,\,0.032\] Then, number of \[{{\operatorname{H}}^{+}} = \left( 0.032 - 0.025 \right)m =0.007m\] \[{{H}^{+}}/HA\,\,\,{{H}^{+}}+A\] \[[{{H}^{+}}]\,\,=\,\,[{{A}^{-}}]\,\,=\,\,0.007m,\,\,=\,\,HA=0.018\] \[{{K}_{a}}=\frac{{{(0.007)}^{2}}}{0.018}\,\,=\,\,3\times {{10}^{-\,3}}\] \[\operatorname{p}/{{K}_{a}}=\,\,-log\,{{K}_{a}}\,=\,\,-log\,(3\times 1{{0}^{-\,3}})\,=\,\,2.5\]You need to login to perform this action.
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