HW 7 - CHM 2046 HOMEWORK 7 Name SEC TA 1 Calculate AG° for...

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Unformatted text preview: CHM 2046 HOMEWORK 7 Name SEC TA 1. Calculate AG° for these reactions at 25°C (AG° = —RT an): (a) AgCl(s) Z Ag+(aq) + Cl'(aq), using Ksp = 1.8}{10-10 AG° = (b) Ag+(aq) + 2NH3(aq) Z Ag(NH3)2+(aq), using Kf = 1.7XlO7 G° = 2. Calculate, for H2CO3(aq) Z C02(g) + H20(l) (at 25 °C) (a) AG° (See Appendix B for the necessary AG°f values.) AG° = (b) K K = (c) What are the units of concentration used to calculate each [...] in the equilibrium expression? H2CO3 in CO2 in H20 in (d) Estimate (to 1 SF) the pressure of C02 in a can of soda. Use this to solve the K expression for the molarity of H2C03. P a _ (:02 _ [H2C03] — Chapter 20 Problems: 1, 2, 5, 10—12, 14, 28, 29, 40—42, 47, 52, 60. Chapter 21 Problems: 1, 7—10. 3. Complete (using H20, H+, and OH‘) and balance these redox equations. Show half—reactions. Circle the 0A, box the RA. (a) No3" + Ag ——> Ag+ + N02 (acidic) (b) Nio2 + Fe ——> Ni(OH)2 + Fe(OH)3' (basic) (c) H202 + Cr(OH)3 —-> CrO4—2 (basic) (d) H202 + MnO4' ——> Mn+2 + 02 (acidic) (e) Cl‘ + C10- ——> Cl2 (basic) (f) 303'2 + HS" ——> 3203‘2 (basic) (g) Br2 ——> Br + BrO3_ (acidic) ...
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