Determine the Equilibrium Constant for the Reaction HF(aq)+ NH₃(aq) A) 12 × 10?⁸
B) 1

question 34

Multiple Choice

Determine the equilibrium constant for the reaction HF(aq) + NH₃(aq) ? F?(aq) + NH₄⁺(aq)
Given the equilibrium constants for the following reactions.
$\begin{array}{ll}\mathrm{HF}(a q) +\mathrm{H}_{2} \mathrm{O}(l) \rightleftharpoons \mathrm{F}-(a q) +\mathrm{H}_{3} \mathrm{O}^{-}(a q) & K_{\mathrm{a}}=6.9 \times 10^{-4} \\\mathrm{NH}_{3}(a q) +\mathrm{H}_{2} \mathrm{O}(l) \rightleftharpoons \mathrm{NH}_{4}^{+}(a q) +\mathrm{OH}-(a q) & K_{\mathrm{b}}=1.8 \times 10^{-5} \\2 \mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{OH}-(a q) +\mathrm{H}_{3} \mathrm{O}^{+}(a q) & K_{\mathrm{W}}=1.0 \times 10^{-14}\end{array}$

• A) 1.2 × 10?⁸
• B) 1.2 × 10⁶
• C) 8.1 × 10⁷
• D) 1.0 × 10¹⁴
• E) 3.8 × 10¹⁵

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