Physical Chemistry Third Edition

322 7 Chemical Equilibrium It is customary to specify the acidity of a solution in terms of the pH, which has been variously def ...

7.3 Chemical Equilibrium in Solutions 323 γ± 10 −^0.^01523  0. 9655 Assume thatγ(HA)≈ 1 1. 752 × 10 −^5  (0.9655)^2 x^2 (0. 1 ...

324 7 Chemical Equilibrium We must solve two simultaneous equations. At 298.15 K the equilibrium relation for the acetic acid is ...

7.3 Chemical Equilibrium in Solutions 325 K 1  7. 52 × 10 −^3 , K 2  6. 23 × 10 −^8 , K 3  2. 2 × 10 −^13 Three simultaneous ...

326 7 Chemical Equilibrium Instead of using the quadratic formula, we solve by successive approximations within our successive a ...

7.3 Chemical Equilibrium in Solutions 327 PROBLEMS Section 7.3: Chemical Equilibrium in Solutions 7.22 Find∆H◦,∆S◦, and∆G◦at 298 ...

328 7 Chemical Equilibrium 7.33 Calculate the pH of a solution from 0.0500 mol of cacodylic acid in 1.000 kg of water at 298.15 ...

7.4 Equilibria in Solutions of Strong Electrolytes 329 where we now omit the label aq on aqueous HCl. At chemical equilibrium, μ ...

330 7 Chemical Equilibrium This equation represents a new version ofHenry’s law. If the activity coefficients are equal to unity ...

7.5 Buffer Solutions 331 with the separated ions. For example Na++Cl−
Na+Cl− The ion pair Na+Cl−isnota molecule. A chemical bond ...

332 7 Chemical Equilibrium and meq(A−) ns 1 .000 kg (7.5-2) Assuming thatγHAequals unity, we obtain Ka γ(H+)(meq(H+)/m◦)γ(A−)( ...

7.5 Buffer Solutions 333 We letmeq(OH−)/m◦yandmeq(H+)/m◦x. Ka γ^2 x ( ms/m◦+x−y ) ma/m◦−x+y Whenyis replaced byKw/γ^2 x, we o ...

334 7 Chemical Equilibrium Solution From the equilibrium of Eq. (7.5-7b) a(CO 2 (aq)) a(H 2 CO 3 ) 2. 58 × 10 −^3 (389)a(H 2 C ...

7.6 The Temperature Dependence of Chemical Equilibrium. The Principle of Le Châtelier 335 b. Neglect the ionization of the acid ...

336 7 Chemical Equilibrium Using Eq. (7.1-20) we can write dln(K) dT  ∆H◦ RT^2 (7.6-4) or dln(K) d(1/T) − ∆H◦ R (7.6-5) Exerci ...

7.6 The Temperature Dependence of Chemical Equilibrium. The Principle of Le Châtelier 337 Solution ∆H◦ 2 ∆fH◦(NO 2 )−∆fH◦(N 2 O ...

338 7 Chemical Equilibrium a system will respond to a stress placed upon it by reacting in the direction that lessens the effect ...

7.6 The Temperature Dependence of Chemical Equilibrium. The Principle of Le Châtelier 339 volume (the stress) will increase the ...

340 7 Chemical Equilibrium which gives 4. 0540 α^2 + 2. 1750 α+ 0. 1054  0 Use of the quadratic formula gives α− 0. 0539 where ...

7.6 The Temperature Dependence of Chemical Equilibrium. The Principle of Le Châtelier 341 PROBLEMS Section 7.6: The Temperature ...