31.) An aqueous mixture of phenol and ammonia has initial concentrations of 0.20

Question

31.) An aqueous mixture of phenol and ammonia has initial concentrations of 0.200 M C6H5OH(aw) and 0.120 M NH3(aw). At equilibrium, the C6H5O-(aw) concentration is 0.050 M. Calculate K for the reactions. Please leo with both questions. 30. If the reaction quotient, Q. is equal to K in a gas phase reaction, then he chemical system has reached equilbrium. b. the temperature must be increased for the reaction to proceed in the forward direction. c. the reaction will proceed in the forward direction until equilibrium is established. d. the reaction will proceed in the backward direction until equilibrium is establis e. the reaction will proceed in the direction hed. that increases the number of gas phase particles. 31. An aqueous mixture of phenol and ammonia has initial concentrations of 0.200 M C&H; OH(aq) and 0.120 M NHs(aq). At equilibrium, the CaHsO (aq) concentration is 0.050 M. Calculate K for the reaction. GHOH (aq) + NH3(aq)-C6HsO-+ NH4+(aq) a. 0.10 0.24 c. 2.1 d. 4.2 e. 4.8 238 bt

Explanation / Answer

30) if K = Q

Chemical system at equillibrium

31) at equilibrium :

[C6h5o-] = [NH4+] = 0.050 M
[c6h5oh] = 0.200 - 0.050 = 0.150 M
[NH3] = 0.120 - 0.050 = 0.070 M

Kc = [c6h5o-][NH4+] / [C6H5OH][NH3] = 0.050 x 0.050 / 0.150 x 0.070 =0.24

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