Arkansas State University  Department of Chemistry and Physics
CHEM2004	Exam 5

3.         List the 5 potentially hazardous combinations and give an example for each.  (15 points)

4.         List two very electronegative nonmetals. (4 points)

5.         In class, the activity of the metals were categorized by their electronegativities.  Give the three classes.          (3 points)

6.         Match the class of silicate with each of the following substances. (1 point each – 15 points total)

7.         Describe how glass is made.  Use the terms acidic oxide and basic oxide in your answer.  (8 points)

8.         Draw the structure of a pyroxene showing four units.    (3 points)

9.         Match the oxide or oxoanion that best fits or describes each of the following:  (1 point each)

10.       For each of the following pairs, circle the compound that is easiest to reduce.  (2 points each)

a)         NO₃^-  or H₃PO₄

b)        GeO₂  or  Ga⁺³

c)         MnO₄^-  or  ReO₄^-

11.       Fill in the blank. (2 points each)

a) Name of the effect that causes current to flow when a pressure is applied

 _________________________________

b) For a spontaneous process the sign of E^o is  ___________________

c) High melting solids with a low volatility _______________________________

d) Process of mixing powders and heating to high temperatures, allowing the powders to slowly fuse into each others’ lattices ____________________________

e) Solids without a regular crystalline pattern are said to be ________________________

f) Problem in the lattice when atoms are missing from the structure is called a
 _________________________________

g) Oxides that do not have a whole number ratio of metal to oxygen are _____________________________________________

h) Oxides that are not formed from acidic oxides and do not have identifiable oxo anions (ex. BaTiO₃) __________________________________

12.       State the First Principle of Isomorphous Substitution and give an example. (6 points)