Ionic EquilibriumHard
Question
What is the aqueous ammonia concentration of a solution prepared by dissolving 0.15 mole of NH4+CH3COO− in 1 L of water? Given: Ka (CH3COOH) = 1.8 × 10−5; Kb (NH4OH) = 1.8 × 10−5.
Options
A.8.3 × 10−4 M
B.0.15 M
C.5.52 × 10−3 M
D.3.8 × 10−4 M
Solution
$\left\lbrack NH_{3} \right\rbrack = \sqrt{\frac{K_{w}}{K_{a}.K_{b}}} \times C = 8.33 \times 10^{- 4}\text{ M}$
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