VSEPR and Polarity Practice with Answers

Doing some REAL work, in preparation for the VSEPR and Polarity Quiz Use the VSEPR technique to answer the following questions about SiH4 a) The central atom is: _______ b) The number of valence electrons on the central atom is: ______ c) The number of bonds on the central atom is: ______ d) The number of lone pairs is: ________ e) The total number of axes of symmetry is: _____________ f) The basic shape: ____________________________________ g) The actual shape: _____________________________ h) Approximate bond angles: __________ i) State whether the molecule is polar or nonpolar: _______________________ GIVE ONE CLEAR REASON WHY: j) Draw the Lewis dot diagram k) Draw the structural formula, attempting to draw the shape in three dimensions Use the VSEPR technique to answer the following questions about XeF2 a) The central atom is: _______ b) The number of valence electrons on the central atom is: ______ c) The number of bonds on the central atom is: ______ d) The number of lone pairs is: ________ e) The total number of axes of symmetry is: _____________ f) The basic shape: ____________________________________ g) The actual shape: _____________________________ h) Approximate bond angles: __________ i) State whether the molecule is polar or nonpolar: _______________________ GIVE ONE CLEAR REASON WHY: j) Draw the Lewis dot diagram k) Draw the structural formula, attempting to draw the shape in three dimensions Use the VSEPR technique to answer the following questions about ICl4 - a) The central atom is: _______ b) The number of valence electrons on the central atom is: ______ c) The number of bonds on the central atom is: ______ d) The number of lone pairs is: ________ e) The total number of axes of symmetry is: _____________ f) The basic shape: ____________________________________ g) The actual shape: _____________________________ h) Approximate bond angles: __________ i) State whether the molecule is polar or nonpolar: _______________________ GIVE ONE CLEAR REASON WHY: j) Draw the Lewis dot diagram k) Draw the structural formula, attempting to draw the shape in three dimensions Use the VSEPR technique to answer the following questions about ClF5 a) The central atom is: _______ b) The number of valence electrons on the central atom is: ______ c) The number of bonds on the central atom is: ______ d) The number of lone pairs is: ________ e) The total number of axes of symmetry is: _____________ f) The basic shape: ____________________________________ <90 Square pyramid g) The actual shape: _____________________________ h) Approximate bond angles: __________ i) State whether the molecule is polar or nonpolar: _______________________ GIVE ONE CLEAR REASON WHY: a j) Draw the Lewis dot diagram k) Draw the structural formula, attempting to draw the shape in three dimensions Doing some REAL work, in preparation for the VSEPR and Polarity Quiz Use the VSEPR technique to answer the following questions about NO2 - a) The central atom is: _______ b) The number of valence electrons on the central atom is: ______ c) The number of bonds on the central atom is: ______ d) The number of lone pairs is: ________ e) The total number of axes of symmetry is: _____________ f) The basic shape: ____________________________________ g) The actual shape: _____________________________ h) Approximate bond angles: __________ i) State whether the molecule is polar or nonpolar: _______________________ GIVE ONE CLEAR REASON WHY: j) Draw the Lewis dot diagram k) Draw the structural formula, attempting to draw the shape in three dimensions Use the VSEPR technique to answer the following questions about WCl6 a) The central atom is: _______ b) The number of valence electrons on the central atom is: ______ c) The number of bonds on the central atom is: ______ d) The number of lone pairs is: ________ e) The total number of axes of symmetry is: _____________ f) The basic shape: ____________________________________ g) The actual shape: _____________________________ h) Approximate bond angles: __________ i) State whether the molecule is polar or nonpolar: _______________________ GIVE ONE CLEAR REASON WHY: j) Draw the Lewis dot diagram k) Draw the structural formula, attempting to draw the shape in three dimensions Use the VSEPR technique to answer the following questions about ClO2 - a) The central atom is: _______ b) The number of valence electrons on the central atom is: ______ c) The number of bonds on the central atom is: ______ d) The number of lone pairs is: ________ e) The total number of axes of symmetry is: _____________ f) The basic shape: ____________________________________ g) The actual shape: _____________________________ h) Approximate bond angles: __________ i) State whether the molecule is polar or nonpolar: _______________________ GIVE ONE CLEAR REASON WHY: j) Draw the Lewis dot diagram k) Draw the structural formula, attempting to draw the shape in three dimensions Use the VSEPR technique to answer the following questions about SbCl5 a) The central atom is: _______ b) The number of valence electrons on the central atom is: ______ c) The number of bonds on the central atom is: ______ d) The number of lone pairs is: ________ e) The total number of axes of symmetry is: _____________ f) The basic shape: ____________________________________ g) The actual shape: _____________________________ h) Approximate bond angles: __________ i) State whether the molecule is polar or nonpolar: _______________________ GIVE ONE CLEAR REASON WHY: j) Draw the Lewis dot diagram k) Draw the structural formula, attempting to draw the shape in three dimensions Doing some REAL work, in preparation for the VSEPR and Polarity Quiz What Causes POLARITY? 1) 2) What is the effect of Polarity on the interaction between molecules? What is the effect of Polarity on the physical properties of a molecule? Give, and explain, a specific example of how Polarity can affect solubility. Explain each of the following INTERMOLECULAR FORCES, but describing what the intermolecular force IS and how it affects a molecule’s behavior: 1) DIPOLE – DIPOLE 2) HYDROGEN BONDING 2b) What are Hydrogen Bonds so strong? 3) LONDON FORCES