AP Chemistry

Chapter 8

Daily Answer Key

 

  1. D
  2. A
  3. A
  4. A
  5. B
  6. A
  7. D
  8. B
  9. C
  10. A
  11. D
  12. C
  13. A
  14.  
  15. a. polar covalent

b. ionic

c. polar covalent

d. covalent

  1. E= -1160kJ/mole
  2. Rb<Ca<Nb<Si<Pt<N<F             
  3. I2<CN-<H2O<NaBr<MnO2
  4. HF (+-), NO (+-), CO (+-), HCl (+-)
  5. a. no dipole

b. negative toward F

c. negative toward O

d. no  dipole

  1. CF4.  The opposing bond polarities in a tetrahedral structure cancel out. Thus, CF4 has no dipole moment.
  2. Ca2+, K+, Cl-, S2-
  3. a. CaO             b. KCl              c. Rb2S            d. Ba3P2

      24.

      25. a. F-<Ca+2<Cl-<Sr2+

        26. a. –157kj      b. –1046kj      c. +95kj

      27. –136.7kj

      28.

      29.

      30. (looking for CO3-2)        

      31.

      32.sigma –single bond, pi-double, triple bind

33.  a. seesaw   b. bent   c. square planar   d. trigonal bipyramidal   e. linear  

           4B1L      2B2L         4B2L                    5B              2B