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CHEM266 Study Guide - Midterm Guide: Lone Pair, Trigonal Planar Molecular Geometry, Molecular Orbital Theory

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aquamarinecamel91

14 Dec 2016

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University of Waterloo

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Document Summary

Primary (1 ) is an sp3 c bonded to one other carbon. Secondary (2 ) is an sp3 c bonded to two other cs. Tertiary (3 ) is an sp3 c bonded to three other cs. Quaternary (4 ) is an sp3 c bonded to four other cs. Hydrogens take their classification from the c they are attached to. Double and triple bonds have higher priority than alkanes, halogens and nitro groups (but there are other higher priority groups, see below) Carbons involved in the double bond are trigonal planar and sp2 hybridized they have a bond angle of. ~120 , the double bond contains one bond and one bond (made up of two p orbitals) Carbons involved in the triple bond are linear and sp hybridized they have a bond angle of 180 , the triple bond contains one bond and two bonds.

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Related Questions

(a) If the valence atomic orbitals of an atom are sp hybridized, how many unhybridized p orbitals remain in the valence shell? How many π bonds can the atom form? (b) Imagine that you could hold two atoms that are bonded together, twist them, and not change the bond length. Would it be easier to twist (rotate) around a single σ bond or around a double (σ plus π) bond, or would they be the same?

carminemallard497

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