Instructions: Circle the best answer for each question.
The Reagent Shelf.
These compounds are available
as pure substances or in solution, as appropriate for your needs.
| Acids | Bases | Boron | Carbon | Halogens | Hydrogen |
| H2SO4
H3PO4 HCl HNO3
|
Ca(OH)2
KOH NaOH
|
B(OH)3
B2O3 BF3 Na2B4O7.10 H2O NaBH4 NaBO3.4 H2O |
C(s)
CaC2 CO CO2 Na2CO3 Na2CO3 NaHCO3 |
Br2
Cl2 I2 KBr KI NaCl |
CaH2
H2 LiAlH4 NaBH4
|
| Metals, Metal Salts | Oxygen | Nitrogen | Phosphorus | Silicon | Sulfur |
| Cu
Cu(NO3)2 Mg MgO MnO2 Zn Zn(NO3)2 |
H2O
H2O2 Na2O O2 O3
|
KNO3
NaNO2 NH3(aq) NH3(g)
|
Ca3P2
H3PO3 H3PO4 P(red) P4 P4O10
|
Si
SiCl4
|
H2S
FeS Na2S Na2SO3 NaHSO3 S8 SO2 SO3 |
Group III Elements
1. Boron compounds burn with a _________ colored flame.
A. blue B. red C. yellow D. green E. white
A. Boron compounds are always flammable.
B. Boron functions as a reducing agent.
C. Boron is a Lewis acid.
D. Boron has an unexpectedly small atomic radius.
E. Boron compounds are unexpectedly unreactive.
A. is protected from further oxidation by a thin film of aluminum oxide
B. is obtained by the Hall process
C. reacts readily with both acids and bases
D. all of the above
E. none of the above
A. Al2Cl6 B. [AlCl2+][AlCl4-] C. Al2O3 D. AlK(SO4)2.12 H2O E. Al(OH)3
A. BxHy B. BxOy C. Bx(OH)y D. BxFy E. BxNy
A. formation of a white precipitate37 In order to study the close-packing nature of aluminum, we used two layers of ping-pong balls in a plastic box. What fraction of the holes between the spheres in the first layer is covered by the layer of balls in the second layer?
B. metallic aluminum becomes tarnished
C. the pH goes up, then down
D. a gas, probably CO2, is produced
E. the white color of lime water becomes colorless
A. 1/4 B. 1/3 C. 1/2 D. all E. none
A. The composition of borosilicate glass is more constant than that found in soda glass.
B. The composition of soda glass is more constant than that found in borosilicate glass.
C. Only borosilicate glass contains SiO2
D. Soda glass does not expand upon heating.
E. None of the above.
A. B.
1. D
2. C
3. D
4. D
5. A
6. A
7. C
8. A
9 and 10. HCl(aq) + Na2B4O7.10H2O