🤓 Based on our data, we think this question is relevant for Professor Schwartz's class at ARIZONA.

A. **CH _{3}NH_{2} + H_{2}O ⇌ CH_{3}NH_{3}^{+} + OH**

$\overline{){{\mathbf{K}}}_{{\mathbf{b}}}{\mathbf{}}{\mathbf{=}}{\mathbf{}}\frac{\left[{\mathrm{CH}}_{3}{{\mathrm{NH}}_{3}}^{+}\right]\left[{\mathrm{OH}}^{-}\right]}{\left[{\mathrm{CH}}_{3}{\mathrm{NH}}_{2}\right]}}$

**ignore liquids such as H _{2}O*

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^{o} 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?