CHE112 EXAM 4 ___________

Balance the following  equations:

1. Fe + HNO₃® Fe(NO₃)₃ + NO₂ +                 Fe + 6HNO₃®Fe(NO₃)₃ + 3NO₂ + 3H₂O

2. MnO₂ + HBr ®        MnO₂ + 4HBr ® MnBr₂ + Br₂ +2H₂O

3. HNO₃ + Cu(OH)₂®               2HNO₃ + Cu(OH)₂® Cu(NO₃)₂ + 2 H₂O

4. Sn + HCl®                      Sn + 2HCl® SnCl₂ + H₂

5. Zn + H₂SO₄ (diluted) ®                Zn + H₂SO₄® ZnSO₄ + H₂

6. KClO₃®   (thermal decomposition)   2 KClO₃®2KCl + 3 O₂

Give structural formulas for each of the following compounds:

7. formic acid

8. dichloromethane

9. cyclopentanol

10. dihydrogen phosphate ion

Name the following compounds:

11. CH₃CH₂CH₂OH    propanol

12. H₂C=CH-CH=CH₂    butadiene

13. CH₃Br                 bromomethane (methyl bromide)

14-16. Draw full formulas (show all atoms) in following: 

17.Which kind of organic molecules contains three fragmentsof organic acids and glycerol?

Lipids (fats, triglicerides)

18. Draw structural formula of alkyne containing two carbon atoms.H-CºC-H

19-20. How it is possible to make polyethylene from ethanol (ethyl alcohol)?Showreactions.

CH₃-CH₂-OH ®  H₂C=CH₂ + H₂O  (elimination)

n H₂C=CH₂®   (-CH₂-CH₂-)  polymerization