Chm 501
Practice Lab Quiz: Alkali Metals

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

ALKALI METALS

1. The alkali metal halides exhibit either the sodium chloride or the cesium chloride structure.  Which of the following correctly summarizes the coordination number (C.N.) for cation and anion in these structures?
 

sodium chloride structure
cesium chloride structure 
 
A. 
B. 
C. 
D. 
E. 
C.N. cation
C.N. anion
eight
eight
six
six
six
six
eight
four
six
six
C.N. cation
C.N. anion
six
six
eight
eight
four
eight
six
six
four
four

2. Which of the following has the greatest ionic character?

A.  LiF
B.  LiI
C.  RbF
D.  RbI
E.  all are equally ionic
3. Which of the following is not a commercially important product of the electrolysis of brine?
A. NaOH
B. H2
C. Cl2
D. HCl
4. Which salt is canary yellow?
 
A. CaO
B. KO2
C. H3BO3
D. Na2O
E. Na2O2
5 and 6. Reagent Shelf Question.  What two reagents did you use to produce NaOH by the a precipitation reaction?
A.     B.
7. From your work in lab, predict which alkali metal would be the most reactive towards air and water?
A. Li          B. Na          C. K          D. Rb          E. Cs
8.  Which alkali metal is gold in color?
A. Li          B. Na          C. K          D. Rb          E. Cs
9.  When you heated metallic lithium in a test tube, what happened?
A. It melted and then boiled away.
B. It caught on fire and burned to form lithium oxide.
C. A bright fireball was observed and the test tube deformed.
D. Yellow lithium superoxide was formed.
E. The reactivity of lithium decreased.
10. Which of the following correctly matches anion name with the correct formula and magnetic properties?
A. oxide, O3-, paramagnetic
B. peroxide, O-, paramagnetic
C. superoxide, O22-, diamagnetic
D. peroxide, O2-, diamagnetic
E. superoxide, O2-, paramagnetic

Answers:
 
1.  B
2.  C
3.  D
4.  B
5 and 6 Ca(OH)2(aq) + Na2CO3(aq)
7.  E
8.  E
9.  C
10.  E