A Solution Is Prepared by Adding 4

question 69

Multiple Choice

A solution is prepared by adding 4.50 mol of sodium hydroxide to 1.00 L of 1.00 M Co(NO₃) ₂. What is the equilibrium concentration of cobalt ions? K_f = 5.0 × 10⁹ for Co(OH) ₄^2-

• A) 1.1 × 10^-2 M
• B) 1.4 × 10^-5 M
• C) 3.2 × 10^-9 M
• D) 2.0 × 10^-10 M
• E) 4.9 × 10^-13 M

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