CHEM
1001/CHM 1020/CHM1025C/CHM 1032C Name
_____ Answers
___________
Module Four Exam
Module Four: Part A: Bond Recognition 5 points
Using a periodic chart, classify each element in the pair as a metal or nonmetal, then predict the bond type that should exist between the two elements. (Assume all metal-nonmetal combinations have an electronegativity difference greater than 1.7.)
1. |
K-Br |
____ionic____________ |
4. |
C-H |
____covalent____________ |
2. |
P-Cl |
____Covalent_________ |
5. |
Cu-Zn |
____metallic___________ |
3. |
Cu-S |
____ionic____________ |
|
|
|
Module Four: Part C: Binary Molecular Compounds 5 points
Using a periodic chart write the names or formulas of the following compounds depending on whether the formula or the name is given.
1. |
CO2 |
___carbon dioxide ____ |
2. |
SO2 |
___Sulfur dioxide______ |
3. |
N2O3 |
___Dinitrogen Trioxide__ |
4. Phosphorus Pentachloride ___PCl5_____
5. Nitrogen Trihydride (Ammonia) ___NH3_____
Module Four: Part D: Binary Ionic Compounds 5 points
Using a periodic chart, write the names or the balanced formulas for the following compounds depending on whether the formula or the name is given:
1. Lithium Sulfide ___Li2S_____________
2. Iron II Chloride ____FeCl2____________
3. Tin IV Fluoride ____SnF4____________
4. CaF2 __Calcium fluoride_________
5. Co3P2 __Cobalt II phosphide______________
Module Four: Part B: Dot Structures of Modules 30 points
Using
a periodic chart draw the electron dot structures of the following molecules:
(Choose
One for each question or the one circled on the paper)
You
may practice your drawing by dragging and dropping the atoms on the Internet
at: http://www.lsua.us/chem1001/dragdrop/menu.html
1. NH3 CH4 H2O2 H2O 2. H2SO4 H3PO4 HClO4
Ammonia Sulfuric Acid
hydrogen peroxide Perchloric Acid
water
3. HNO3 H2CO3 HNO2 4.
CO2 HCN CO
SO3
Carbonic Acid Hydrogen Cyanide
Nitrous
Acid Carbon
Monoxide
Sulfur
Trioxide
5. HC2H3O2 H2C2O4
HCHO2 6. C2H4 C2H2 C3H8 C2H6
carbon to carbon by single
covalent bond
7. CH2O
CH3COCH3 CH3OCH3
carbon
to carbons by single covalent bonds oxygen separates the carbons
Module Four: Part E:
Polyatomic Ions 5
points
Using a periodic
chart write the names or formulas of the polyatomic ions depending on whether
the formula or the name is given. (The
formula must include the ion’s appropriate charge.)
1.
SiO3 2-
__silicate______________
2.
SO4 2- __sulfate______________
3.
PO4 3-
__phosphate___________
4.
ClO4 1-
__perchlorate__________
5.
NO2 1-
__nitrite_____________
6.
Hydroxide __OH 1-______________
7.
Ammonium __NH4 1+______________
8. Hypochlorite __ClO 1-______________
9.
Nitrate __NO3 1-_____________
10.
Sulfite __SO3 2-______________
BONUS: If you miss one of the above
questions, one of the ions below will replace
any incorrect answer, provided the bonus answer is correct.
Bonus #1
Acetate ___C2H3O2
1-_____________
Bonus #2
Cyanide ___CN 1-_____________
Bonus #3
Thiocyanate
___CNS 1-_____________
Module Four: Part F:
Ternary Ionic Compounds 5
points
Using a periodic
chart write the names or formulas of the following compounds depending on
whether the formula or name is given:
1.
K2SiO3
_Potassium
silicate______________
2.
Na3PO4 _Sodium phosphate_____________
3.
(NH4)2SO3 _Ammonium sulfite______________
4. Mg(OH)3
__Magnesium
hydroxide__________
5. Fe(IO3)3 __Iron III Iodate______________
6.
Ammonium Hydroxide ___NH4OH_____________
7.
Aluminum Hydroxide ___Al(OH)3_____________
8.
Sodium Perchlorate ___NaClO4_____________
9.
Calcium Nitrite
___Ca(NO2)2____________
10. Copper II Sulfate ____CuSO4___________
Module
Four: Part G: Binary/Ternary Acid 5
points
Using a periodic
chart write the names or balanced chemical formulas of the following compounds,
depending on whether the formula or the name is given. (Assume all compounds in
a aqueous solution):
1. HCl
_Hydrochloric
Acid_______________
2. HClO _Hypochlorous Acid_______________
3.
HClO2 _Chlorous Acid_______________
4.
HClO3
_Chloric Acid______________
5.
HClO4
_Perchloric Acid_______________
6.
Nitric Acid __HNO3______________
7.
Carbonic Acid __H2CO3______________
8. Sulfuric Acid __H2SO4______________
9.
Phosphoric Acid __H3PO4______________
10.
Nitrous Acid __HNO2______________
Module
Four: Part H: Inorganic Compounds 10
points
Using a periodic
chart write the names or balanced chemical formulas of the following compounds,
depending on whether the formula or the name is given:
1.
CO2 __Carbon dioxide_____________
2.
H2O2 __Dihydrogen dioxide
(Hydrogen Peroxide)_
3. HBrO3 (aq)
__Bromic Acid______________
4.
Fe2O3 __Iron III oxide______________
5.
NiSO4 __Nickel II sulfate______________
6.
Calcium Phosphate __Ca3(PO4)2______________
7.
Sodium Hydroxide ___NaOH_____________
8.
Sulfurous Acid ___H2SO3_____________
9.
Aluminum Carbonate ___Al2(CO3)3_____________
10.
Ammonium Chloride ___NH4Cl_____________
Module
Four: Part M: Multiple Choice 10 points
1. According to the general trends in the
periodic table, which of the following elements is the most
electronegative?
(a) O |
(b) F |
(c) P |
(d) S |
(e) Cl |
2. Draw the electron dot formula for ethylene,
C2H4, and state the type of bonds in one molecule.
(a) 6 single bonds |
(b) 5 single bonds |
(c) 4 single bonds and 1 double bond |
(d) 4 single bonds and 2
double bonds |
(e) 4 single bonds and 1
triple bond |
3. Magnesium metal and oxygen gas react to form
the ionic compound magnesium
oxide. Which of the following
statements is true?
(a) Valence
electrons are transferred from oxygen to magnesium atoms.
(b) The magnesium
atom and the magnesium ion have the same number of valence electrons.
(c) Magnesium and
magnesium oxide have similar properties.
(d) The smallest
representative particle is a molecule.
(e) none
of the above
4. Which noble gas is isoelectronic
with a lithium ion?
(a) helium |
(b) neon |
(c) argon |
(d) krypton |
(e) xenon |
5. Which of the following ions has the electron
configuration 1s2 2s2 2p6
(a) F-1 |
(b) O2- |
(c) N3- |
(d) all of the
above |
(e) none of the above |
6. What type of chemical bond results from
transferring valence electrons from a metal to a nonmetal?
(a) covalent bond |
(b) ionic bond |
(c) metallic bond |
(d) coordinate covalent bond |
(e) none of the above |
7. The mercury (II) ion, Hg2+, is
classified as which of the following?
(a) monoatomic cation |
(b) monoatomic anion |
(c) polyatomic cation |
(d) polyatomic anion |
(e) none of the above |
8. Aqueous H2S is classified as
which of the following?
(a) binary ionic |
(b) ternary ionic |
(c) binary molecular |
(d) binary acid |
(e) ternary oxyacid |
9. What is the formula for the nitride ion?
(a) N3- |
(b) N2- |
(c) N– |
(d) NO2- |
(e) NO2- |
10. What is the formula for the hydrogen
carbonate ion?
(a) C2H3O2-1 |
(b) C2H3O22- |
(c) HCO3-1 |
(d) HCO32- |
(e) none of the above |