Question
What is the molar ratio of base/salt required to prepare a buffer of ammonium hydroxide and ammonium chloride having the $\mathrm{pH} 7.8$, using a $\mathrm{pK}_{\mathrm{b}}$ of ammonium as 4.76 at $25^{\circ} \mathrm{C}$ ?
Step 1
Step 1: Write the equation for the dissociation of ammonium hydroxide and ammonium chloride in water: $$ \begin{array}{l} \text { NH }_{4} \text { OH }(aq) \rightleftharpoons \text { NH }_{4}^{+}(aq)+\text { OH }^{-}(aq) \\ \text { NH }_{4} \text { Cl }(aq) Show more…
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