Equal Volumes of 0

question 57

Multiple Choice

Equal volumes of 0.020 M Ag⁺(aq) solution and 2.0 M NH₃(aq) solution are mixed.K_f for [Ag(NH₃) ₂]⁺ is 1.6 × 10⁷.If trisodium arsenate is added so that the arsenate ion concentration is 0.10 M,will silver arsenate precipitate?
What is Q_sp? K_sp for silver arsenate is 1.0 × 10^-22.

• A)no,Q_sp = 6.3 × 10^-9
• B)no,Q_sp = 1.9 × 10^-29
• C)yes,Q_sp = 6.5 × 10^-9
• D)yes,Q_sp = 4.2 × 10^-20
• E)no,Q_sp = 2.6 × 10^-29

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