NH₃ acts a weak base in water with a Kb= 1.76 x 10⁻⁵ at 25° C. At 25° C, the equilibrium concentration of the NH₄⁺ ion in a 10 M aqueous solution of NH₃ would be closest to which of the following?
A. 0.001 M
B. 0.01 M
C. 0.1 M
D. 1 M

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