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[50mL" of "0.05M" Propane- "1,2" -diamin...

[50mL" of "0.05M" Propane- "1,2" -diamine solution is titrated with "0.1M" HCl solution at "25^(@)C" .Determine the "],[pH" of solutions obtained by adding following volumes of HCI solution: "],[[" (a) "12.5mL," (b) "25mL],[" Given ":pK_(b)" and "pK_(b_(2))" of weak base are "4.18" and "7.39" respectively."]]

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