Acetic acid is a weak acid that dissociates into the acetate ion and a proton in aqueous solution at equilibrium at 25 °c a 0.100 m solution of acetic acid has the following concentrations [hc2h3021-0.0990 m, ic2h302-1-1.33 10-3m, and h1-133-10-3m. the equilibrium constant, keq for the ionization of acetic acid at 25c a) 0.100 b) 5.71 104 c) 1.75 x 10-7 5.71 106 1.79 10-5 38) dinitrogentetraoxide partially decomposes into nitrogen dioxide. a 1.00-l flask is charged with 00400 mol of n204. at equilibrium at 373 k, 0.0055 mol of n204 remains. keq for this reaction is a) 22 10-4 b) 0.22 c) 0.022 d) 13 0.87 39) in an experiment, 0.42 mol of c0 and 0.42 mol of h2 were placed in a 1.00-l reaction vessel to yield ch3oh. at equilibrium, there were 0.29 mol of co remaining. keq at the temperature of the experiment is a) 14.5 ? )2.80 c) 0.357 17.5 e) none of the above 40) a sealed 1.0 l flask is charged with 0.500 mol of 12 and 0.500 mol of br2. an equilibrium reaction ensues 12 (8) br2 (g) 21br(g) when the container contents achieve equilibrium, the flask contains 0.84 mol of ibr. the value of 110b) 61)28d40 e) 11 c) 2.8 d) 4.0 41) the equilibrium constant (kp) for the interconversion of pa5 and pcs is 0.0121. a vessel is charged with pcls giving an initial pressure of 0.123 atm and yields pc13 and cl2. at equilibrium, the partial pressure of pci3 is atm. a) 0.0782 b) 0.123 c) 0.0455 d) 0.0330 e) 0.0908 42) at 200 °c, the equilibrium constant (kp) for the conversion of no to oxygen and nitrogen gas is 2.40 103. a closed vessel is charged with 36.1 atm of no. at equilibrium, the partial pressure of atm. a) 294 b) 6.00 ) 1.50 10-2