CH107 SPECIMEN EXAM-TYPE QUESTIONS (3)
Chapter 4
The questions are worth equal points
1. Given the following information, write as many ionic compounds as you
can. Also, write the name for each ionic compound.
(Na+, Ca2+, Ce3+, PO33-, and SO42-)
2. Vanadate, VO43-, is an important oxyanion of vanadium. Write the
chemical formula and chemical names for compounds formed between
the vanadate ion and sodium, ammonium, and nickel (II) ions.
3. Vanadyl is a polyatomic ion with the following formula, VO 2+. Write the
chemical formula and chemical name for the compounds formed between
vanadyl and the sulfide, nitrate, and sulfate ions.
4. Explain why the following chemical name is incorrect. Write the correct
name for the chemical compound: nitrogen (V) oxide
5. When mixed together, aqueous solutions of lead(II) nitrate and magnesium
iodide produce a yellow precipitate. Write the molecular, total ionic, and
net ionic equations for this reaction.
Solutions
1.
Na3PO3
CaSO4
Na2SO4
CePO3
NaCaPO3
Ce2(SO4)3
Ca3(PO3)2
sodium phosphite
calcium sulfate
sodium sulfate
cerium (III) phosphite
sodium calcium phosphite
cerium (III) sulfate
calcium phosphite
2.
Na3VO4
(NH4)3VO4
Ni3(VO4)2
sodium vanadate
ammonium vanadate
nickel (II) vanadate
1
3.
(VO2)2S; vanadyl sulfide
(VO2)2SO4; vanadyl sulfate
VO2NO3; vanadyl nitrate
4.
Nonmetal-nonmetal binary compounds do not use the stock method with
which to name their compounds. These types of compounds use Greek
prefixes to indicate the number of atoms of each element in the compound.
The correct name for this compound is dinitrogen pentoxide (N2O5).
5.
Molecular Total Ionic Net Ionic -
Pb(NO3)2(aq) + MgI2(aq)  PbI2(s) + Mg(NO3)2(aq)
Pb2+(aq)+2NO3-(aq)+Mg2+(aq)+2I-(aq)
PbI2(s)+Mg2+(aq)+2NO3-(aq)
Pb2+(aq) + 2 I-(aq)  PbI2(s)
2