Chapter 11, Problem 11.2P

Interpretation Introduction

Interpretation:

$K_{\text{a2}}$ value for reaction of ${\text{H}}_{\text{2}}{\text{SO}}_{\text{4}}$ and $K_{\text{b2}}$ value for reaction of disodium oxalate $\left({\text{Na}}_{\text{2}}{\text{C}}_{\text{2}}{\text{O}}_{\text{4}}\right)$ has to be determined. Also, its numerical value has to be calculated.

Concept Introduction:

$K_{\text{a2}}$ for reaction is defined as second dissociation constant for acid. It helps to determine the amount of hydrogen ions in acid. First dissociation reaction for sulfuric acid is as follows:

  ${\text{H}}_{\text{2}}{\text{SO}}_{\text{4}}\stackrel{K_{a1}}{\rightleftharpoons }{\text{HSO}}_4^{-}+{\text{H}}^{+}$

$K_{\text{b2}}$ for reaction is defined as second association constant for base. It helps to determine the amount of hydroxide ions in base. In this proton is added to ${\text{Na}}_{\text{2}}{\text{C}}_{\text{2}}{\text{O}}_{\text{4}}$. First dissociation reaction for ${\text{Na}}_{\text{2}}{\text{C}}_{\text{2}}{\text{O}}_{\text{4}}$ is as follows:

  ${\text{Na}}_{\text{2}}{\text{C}}_{\text{2}}{\text{O}}_{\text{4}}\stackrel{K_{\text{b1}}}{\rightleftharpoons }{\text{HC}}_{\text{2}}{\text{O}}_4^{-}+{\text{OH}}^{-}$