What Is the Approximate Concentration of Free Fe³⁺(aq)ion in a Solution

question 32

Multiple Choice

What is the approximate concentration of free Fe³⁺(aq) ion in a solution prepared by mixing equal volumes of 0.06 M Fe³⁺(aq) and 4.0 M F^-(aq) solutions? [The net formation constant for FeF₅(H₂O) ^2- is 2.0 × 10¹⁵.]

• A)2.8 × 10^-23 M
• B)6.7 × 10^-21 M
• C)6.9 × 10^-19 M
• D)4.0 × 10^-15 M
• E)8.9 × 10^-10 M

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