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Aqueous ChemistryMCQ

The tetramminecopper(II) ion, Cu(NH3)4^2+, has a formation constant Kf = 1.1 × 10^13. What is the miAqueous Chemistry Chemistry Question

Question

The tetramminecopper(II) ion, Cu(NH3)4^2+, has a formation constant Kf = 1.1 × 10^13. What is the minimum concentration of free ammonia in solution required to ensure that at least 99.9% of the dissolved copper(II) ion is found in the form of its ammonia complex?

A.

9 × 10–14 M

B.

9 × 10–11 M

C.

8 × 10–4 M

D.

3 × 10–3 M

✓ Correct
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