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Chapter 5 _ 6 Review

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Chapter 5 _ 6 Review Powered By Docstoc
					Che mistry 337 - Chapter 6&8 Review                       Name _________________________________

   1. What is the octet rule? _________________________________________________________________

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   2. What are the charges formed by the following atoms?

      A) Ca ______          B) P ______           C) Kr ______          D) Cl _______         E) Al _______

   3. What is a cation? How is a cation formed? _________________________________________________

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   4. What is an anion? How is an anion formed? ________________________________________________

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   5. Why do ionic compounds conduct electricity when dissolved in water? __________________________

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   6. Determine if the following compounds are ionic, polar covalent or nonpolar covalent.

   A) HCl __________________________              B) CaBr2 ________________________________

   C) Br2 ___________________________             D) NO 2 _________________________________

   E) K 2 SO 4 ________________________           F) H2 ___________________________________

   7. Which substance will have a higher melting point, CaBr2 or Br2 ? Explain your choice.

   ______________________________________________________________________________________

   8. Which substance(s) from question 6 will not dissolve in water? ________________________________

   9. Which substance(s) will dissolve in water, but will not conduct electricity when dissolved? __________

   10. Name the following ionic compounds: A) Fe(NO 3 )3 _________________________________________

   B) Al2 S3 _________________________________            C) MgSO 4 ________________________________

   D) Mn(OH)2 _____________________________               E) KCl ___________________________________

   11. Write the formulas for the following ionic compounds (remember charges must add up to zero)

   A) calcium phosphate ______________________            B) cobalt (III) oxide _________________________

   C) iron (II) sulfide _________________________         D) lithium fluoride __________________________

   12. What is a polyatomic ion? _____________________________________________________________
13. Name the following covalent compounds:

A) AsCl3 __________________________________             B) N 4 F8 _________________________________

C) C2 P5 ___________________________________            D) CF4 __________________________________

14. Write the formulas for the following covalent compounds:

A) dinitrogen hexoxide _______________________          B) boron tribromide ________________________

C) triboron decachloride ______________________         D) tetracarbon heptafluoride _________________

15. Draw the Lewis structures for the following molecules/ions. Then, indicate their shapes and show a ll
    resonance structures if possible.
A) CF4                             B) PO 3 3-                         C) CSe2




Shape: __________________        Shape: ______________________         Shape: ________________________

16. Describe the difference between polar covalent and nonpolar covalent bonds. _____________________

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17. What is a double bond? When would a molecule have a double bond? ___________________________

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18. How are ionic bonds different from covalent bonds? _________________________________________

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19. What does VSEPR stand for? What does it tell us about molecules?




20. What are the two other shapes not given in question #15?

				
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