Given the Following Acid Dissociation Constants,
K_a (H₃PO₄)= 7 $\times$ 10^-3
K_a (NH₄⁺)= 5

question 54

Multiple Choice

Given the following acid dissociation constants,
K_a (H₃PO₄) = 7.5 $\times$ 10^-3
K_a (NH₄⁺) = 5.6 $\times$ 10^-10
Determine the equilibrium constant for the reaction below at 25 ^$\circ$ C.H₃PO₄(aq) + NH₃(aq) NH₄⁺(aq) + H₂PO₄^-(aq)

• A) 4.2 \(\times\) 10^-12
• B) 7.5 \(\times\) 10^-8
• C) 4.2 \(\times\) 10²
• D) 1.3 \(\times\) 10⁷
• E) 2.4 \(\times\) 10¹¹

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