A Solution Is Prepared by Adding 4

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) ₄²¯

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