Calculate the Molar Concentration of Uncomplexed Zn²⁺ in a Solution

question 42

Multiple Choice

Calculate the molar concentration of uncomplexed Zn²⁺ in a solution that contains 0.20 mol of Zn(NH₃) ₄²⁺ per liter. The overall K_f for Zn(NH₃) ₄²⁺ is 3.8 × 10⁹.

• A) 6.7 × 10^-4 M
• B) 2.9 × 10^-3 M
• C) 2.0 × 10^-13 M
• D) 8.8 × 10^-3 M
• E) none of these

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An educational technique where a teacher provides successive levels of temporary support to help students achieve higher levels of comprehension and performance.

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A teaching method that involves providing support to students as they learn new concepts, gradually reducing the support as the students become more proficient.