The K_{b} for methylamine, CH_{3}NH_{2}, at 25°C is 4.4 x 10^{-4}

a. Write the chemical equation for the equilibrium that corresponds to K _{b}.

b. By using the value of K_{b}, calculate ΔG° for the equilibrium in part a.

c. What is the value of ΔG at equilibrium?

d. What is the value of ΔG when [H ^{+}] = 1.6 ×10^{-8} M, [CH_{3}NH_{3}^{+}] = 5.5 ×10^{-4} M, and

[CH_{3}NH_{2}] = 0.130 M?

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