Chap_8_HW_solutions

Chap_8_HW_solutions - Chapter 8 Homework Solutions 24...

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Chapter 8 Homework Solutions 24. Without using Fig. 8.3, predict the order of increasing electronegativity in each of the following groups of elements. a. Na, K, Rb b. B, O, Ga c. F, Cl, Br d. S, O, F 30. Indicate the bond polarity (show the partial positive and partial negative ends) in the following bonds. a. C-O b. P-H c. H-Cl d. Br-Te e. Se-S 34. Write electron configurations for a. the cations: Mg 2+ K + A l 3+
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b. the anions: N 3- O 2- F - T e 2- 40. For the following groups, place the atoms and/or ions in order of decreasing size. a. V, V 2+ , V 3+ , V 5+ b. Na + , K + , Rb + , Cs + c. Te 2- , I - , Cs + , Ba 2+ d. P, P - , P 2- , P 3- e. O 2- , S 2- , Se 2- , Te 2- 44. Which compound in each of the following pairs of ionic substances has the most exothermic lattice energy? Justify your answers. a. LiF, CsF b. NaBr, NaI c. BaCl 2 , BaO d. Na 2 SO 4 , CaSO 4
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e. KF, K 2 O f. Li 2 O, Na 2 S 46. Use the following data to estimate H f o for magnesium fluoride. M g (s) + F 2 (g) MgF 2 (s) Lattice Energy -3916 kJ/mol First Ionization Energy of Mg 735 kJ/mol Second Ionization Energy of Mg 1445 kJ/mol Electron Affinity of F -328 kJ/mol Bond Energy of F 2 154 kJ/mol Enthalpy of sublimation of Mg 150. kJ/mol
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52. The lattice energies of FeCl 3 , FeCl 2 , and Fe 2 O 3 are (in no particular order) -2631, -
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This note was uploaded on 10/23/2010 for the course CHEM 105A taught by Professor Bau during the Fall '04 term at USC.

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Chap_8_HW_solutions - Chapter 8 Homework Solutions 24...

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