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CHM 231 Study Guide - Quiz Guide: Acid Dissociation Constant, Sigma Bond, Newman Projection

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viridianalligator183

30 Oct 2014

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Chm231 study guide for test 1 (spring, 2010) This study guide is intended to help you prepare for the first exam on monday, february 22nd. In general, anything covered in the lecture could be part of the exam. However, this guide tries to help you focus on the main requirements. We will spend at most of the lecture on friday, february. 19th to review the material and discuss your questions. Ground state electron configuration of the elements, particularly of row 1-3. Lewis model of bonding (octet rule): draw plausible lewis structures for a given molecular formula. Electronegativity: trend in electronegativity in the periodic table; indicate polarity of a bond; you do not need to memorize any numbers of electronegativities, they will be given to you if required to answer a question. Polar and nonpolar covalent bonds, ionic bonds. Formal charge: derive formal charge of the atoms in a molecule.

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Related Questions

Please show how you came to these conclusions.

8 which of the following solids would have the highest melting point? ( 1) KI (2) KBr (3) KCI (4) KF 9. What type of chemical bond holds the atoms together within a water molecule? (1) polar ionic bond(3) non polar covalent bond (4) coordinate covalent bond 10. Which of the following covalent bonds is the most polar (i.e., highest percent ionic character)? (1) A -CI (2) Si- (3)Al- (4) SI-Ci 11. The total number of valence electrons in the ion SO is (1)32 (2)28 (3)30 (4) 26 12. The Lewis structure reveals a double bond in which of the following molecules? (1)N (2) Br (3) CS: (4) CaHe 13. The Lewis structure reveals an unpaired electron (free radical) in which of the following species? () NO (2)N:O (3) NO (4) NO 14. The number of lone electron pairs in the CIO ion is (1) 12 (2)16 (3)4 (4)0 15. The formal charge on the bromine atom in BrOs drawn with three single bonds is (1)*2 16. Which of the elements listed below would most likely form a polar covalent bond when bonded to sulfur? 17. Give the number of lone pairs around the central atom and the molecular geometry of SeF(1)0 lone 18. According to Molecular Orbital Theory, two separate 1s orbitals interact to form what molecular orbital(l)? 19. The Lewis dot symbol for the S-ion is (2)-1 (1) K (2) Mg (3)C (4)o pairs, tetrahedral (2) 1 lone pair, square pyramidal (3) 1 lone pair, tetrahedral (4) 1 lone pair, distorted tetrahedron (seesaw) (1)oonly (2) Ï only (3) Ï and Ï. (4) Ï and Ï. 2- 20. Which of the following molecules has polar bonds but is a nonpolar molecule? (1) CO (2) Cla 21. Use VSEPR theory to predict the geometry of the SFe molecule. (1) trigonal bipyramidal (2) bent 22. The geometry of the hybrid orbitals about a central atom with sp hybridization is (1) linear (2) bent 23. Which of the following molecules have the same geometries? (1) CO2 and BeHa (2) SFa and CHe 24. According to the VSEPR theory, which one of the following species is linear? (1)HaS (2) SO2 25. Which of the following substances will display an incomplete octet in its Lewis structure? (1) CO2 26. Predict the geometry and polarity of the CS2 molecule. (1) linear, polar (2) linear, nonpolar (3) SO (4) HBr (3) trigonal planar (4) octahedral (3) trigonal planar(4) tetrahedral (3) CO2 and NO2 (4) N2O and NO2 (3) BFs (4) BeF2 (2) NO (3) Cl2 (4) BrCI (3) bent, nonpolar (4) bent, polar

Show transcribed image text 8 which of the following solids would have the highest melting point? ( 1) KI (2) KBr (3) KCI (4) KF 9. What type of chemical bond holds the atoms together within a water molecule? (1) polar ionic bond(3) non polar covalent bond (4) coordinate covalent bond 10. Which of the following covalent bonds is the most polar (i.e., highest percent ionic character)? (1) A -CI (2) Si- (3)Al- (4) SI-Ci 11. The total number of valence electrons in the ion SO is (1)32 (2)28 (3)30 (4) 26 12. The Lewis structure reveals a double bond in which of the following molecules? (1)N (2) Br (3) CS: (4) CaHe 13. The Lewis structure reveals an unpaired electron (free radical) in which of the following species? () NO (2)N:O (3) NO (4) NO 14. The number of lone electron pairs in the CIO ion is (1) 12 (2)16 (3)4 (4)0 15. The formal charge on the bromine atom in BrOs drawn with three single bonds is (1)*2 16. Which of the elements listed below would most likely form a polar covalent bond when bonded to sulfur? 17. Give the number of lone pairs around the central atom and the molecular geometry of SeF(1)0 lone 18. According to Molecular Orbital Theory, two separate 1s orbitals interact to form what molecular orbital(l)? 19. The Lewis dot symbol for the S-ion is (2)-1 (1) K (2) Mg (3)C (4)o pairs, tetrahedral (2) 1 lone pair, square pyramidal (3) 1 lone pair, tetrahedral (4) 1 lone pair, distorted tetrahedron (seesaw) (1)oonly (2) Ï only (3) Ï and Ï. (4) Ï and Ï. 2- 20. Which of the following molecules has polar bonds but is a nonpolar molecule? (1) CO (2) Cla 21. Use VSEPR theory to predict the geometry of the SFe molecule. (1) trigonal bipyramidal (2) bent 22. The geometry of the hybrid orbitals about a central atom with sp hybridization is (1) linear (2) bent 23. Which of the following molecules have the same geometries? (1) CO2 and BeHa (2) SFa and CHe 24. According to the VSEPR theory, which one of the following species is linear? (1)HaS (2) SO2 25. Which of the following substances will display an incomplete octet in its Lewis structure? (1) CO2 26. Predict the geometry and polarity of the CS2 molecule. (1) linear, polar (2) linear, nonpolar (3) SO (4) HBr (3) trigonal planar (4) octahedral (3) trigonal planar(4) tetrahedral (3) CO2 and NO2 (4) N2O and NO2 (3) BFs (4) BeF2 (2) NO (3) Cl2 (4) BrCI (3) bent, nonpolar (4) bent, polar