Name _______________
Chemical Equation 2012 Review
____ Na(s) + _____ N2 (g) -----> _____ NaN3 (s)
a) Balance the equation 3pts
b) What type of reaction is it and why? 2pts
2. Given the following reaction answer questions 2a--2d.
2 Al (s) +
2H2SO3 (aq) ----> Al2 (SO3)3 (aq) +
3 H2 (g) This is not balanced
a) What type of reaction is this? __________________ and why 2pts
b) How many atoms of aluminum react? _____ 1pt each
How many molecules of H2SO3react? _____
How many aluminum sulfite form? _____
How many hydrogen molecules form? ______
c) What is the total number of aluminum atoms which react? ______aluminum in the products? ____
What is the total number of hydrogens which react? _____ hydrogens in the products? ______
What is the total number of oxygens which react? ______ oxygens in the products ? _______
What is the total number of sulfurs which react? ________ sulfurs in the products ? _______
.
d) According to the Standard Electrode Potential or activity of metals chart does this reaction take place.
How do you know this from the charts given? 2pts
5. (1pt each) What type of reaction does it represent?
a
b
C
d
6. Balance the following reaction and identify what type of reaction it is and why? 3pts
_____ C6H14 (g) + _____ O2 (g) -----> ______ CO2 (g) + _____ H2O (g)
a) Type of reaction: ___________________ Why?2pts
b) How does the potential energy of the C6H14 (g) + O2 (g) compare to the potential energy of
the CO2 (g) + H2O (g). How do you know this? What is the primary purpose of this type of
reaction? Why do we burn hydrocarbons?3pts
c) What has a greater affinity for hemoglobin 1pt
a) oxygen
b) nitrogen c) carbon dioxide
d) Why is it important to know this? 2pts
6. a) Na2C2O4
d) HCl
a) sulfurous acid
d) cesium sulfide
d) carbon monoxide
b) MnBr2
c) P2O5
e) HClO4
b) nitric acid
f) HClO
c)
e) Vanadium (III) oxide
f) ammonium sulfate
g) dinitrogen trioxide
8. a) Finish the following word equation:
An aqueous iron (III) chloride reacts with an aqueous solution of manganese (II) hydroxide to
produce ___________ ______________ and _____________ __________________.2pts
b) What type of reaction is it? ____________________ and why? 2pts
c) Write a balanced symbol equation including subscripts, coefficients and phases. The product that
forms a precipitate is the compound containing the hydroxide ion? 12 pts
iv) symbols, subscripts, coefficients, and phases of matter
8. Balance the following reaction 3pts
______ Fe2O3 (g) -----> ____Fe (s) + ____ O2 (g)
Type of reaction: ________________________ Why? 2pts
9.
Aluminium Strip
V
Silver (Ag) Strip
Aluminium
chloride solution
Silver nitrate
solution
Porous Ceramic Container
a) Which metals is more reactive? Loses electrons? Is oxidized? Is the source of electrons? Is the negative
electrode? Is the anode? Produces Positive Ions? Mass decreases?
b) Which metal is less reactive? Gains Electrons? Is Reduced? Attracts Positive Ions? Mass increases?
Is the positive electrode? Is the cathode?
e) What are the “half reactions which develop a potential difference between these metals and their ions?
( Use your standard electrode potential chart ) 4pts
f) What is the electrode potential between the aluminium / aluminium ions and the silver / silver
ions? 2pts
g) Which way do the negative ions travel through the porous ceramic container?
h) Which way do the positive ions travel through the porous ceramic container?
Nomenclature Review
1. Why is the name of MgCl2 magnesium chloride not:
a) magnesium (II) chloride
b) magnesium dichloride
c) magnesium chlorine
d) magnesium chlorate
2. Why is the name of Co(NO3)3 cobalt (III) nitrate not
a) cobalt nitrate
b) cobalt (II) nitrate
c) cobalt trinitrogen nano oxide
d) cobalt (III) nitrite
3. Why is the name of Li3PO4 lithium phosphate not
a) lithium (I) phosphate
b) trilithium monophosphourous tetraoxide
c) lithium phosphide
d) lithium (III) phosphate
4. Why is the name of FeS2O3 iron (II) thiosulfate not
a) iron thiosulfate
b) iron (I) thiosulate
c) iron disulfur trioxide
d) iron (III) sulfate
5. Why is the name CuS copper (II) sulfide not
a) copper sulfide
b) copper (I) sulfide
c) copper (II) sulfate
d) copper (II) sulfite
6. Why can CO2 have two names ( carbon dioxide and carbon (IV) oxide)?
7. Why can P2O5 have two names phosphorous (V) oxide and diphosphorous pentoxide?
8,
Why is name of Al2O3 aluminim oxide not
a) aluminium (III) oxide
b) dialuminium trioxide
c) aluminium oxalate
d) aluminium nitrate
9. Why is the name of HF (aq) hydrofluoric acid not
a) fluoric acid
b) fluorous acid
10. Why is the name of HClO2 (aq) chlorous acid not
a) hydrochlorous acid
b) chloric acid
c) hypochlorous acid
11. Why is the name of HClO4 (aq) perchloric acid not
a) hydroperchloric acid
b) perchlorous acid
c) hydrochloric acid
12. Why is the name of C2H5OH ethanol not
a) dicarbon hexahydrogen monooxide
b) ethanoic acid
c) carbon hydrogen oxide
13. The formula of lithium sulfate is Li2SO4 not
a) Li (SO4)2
b) Li2S
14. The formula of Copper (I) oxide is Cu2O not
a) CuO
b) CuCO3
15. The formula of Iron (II) sulfite is FeSO3 not
a) Fe2(SO3)2
b) Fe2SO3
16. The formula of nickel (III) carbonate is Ni2(CO3)3 not
a) Ni3C
b) Ni3(CO3)2
17. The formula of hydrosulfuric acid is H2S not
a) H2SO3
a) H2SO4
18. The formula of chloric acid is HClO3 not
a) HCl
b) HClO
c) HClO2
d) HClO4
19. The formula of nitrous acid is HNO2 (aq) not
a) H3N (aq)
b) HNO3 (aq)
20 a) What is the name of each of the following
KClO2
BaO
MnO2
Ca(CN)2
Cu(NO2)2
N2O
HNO2(aq)
H2CO3(aq)
b) What is the formula of each?
Lead(II) iodide
calcium chloride
phosphoric acid
sulfurous acid
hydroiodidic acid
cobalt (III) sulfite
HBr(aq)
ammonium carbonate
strontium thiosulfate
Name _______________
__2__ Na(s) + __3___ N2 (g) -----> ___2__ NaN3 (s)
a) Balance the equation 3pts
b) What type of reaction is it and why? 2pts
A synthesis reaction because a single compound is formed A + B  AB. The sodium reacts with
nitrogen to form the compound known with the common name of sodium azide.
2. Given the following reaction answer questions 2a--2d.
2 Al (s) +
2H2SO3 (aq) ----> Al2 (SO3)3 (aq) +
3 H2 (g) This is not balance
a) What type of reaction is this? ______SR____________ and why 2pts
An element replaces another element that is part of a compound. It follows the A + BZ -> AZ + B./
The Aluminium replaces the hydrogen in the compound H2SO3
b) How many atoms of aluminum react? _2____ 1pt each
How many molecules of H2SO3react? ___2__
How many aluminum sulfite form? __1___
How many hydrogen molecules form? ___3___
c) What is the total number of aluminum atoms which react? __2____aluminum in the products? __2___
What is the total number of hydrogens which react? __4___ hydrogens in the products? __6____
What is the total number of oxygens which react? ___6___ oxygens in the products ? ___9____
What is the total number of sulfurs which react? ____2____ sulfurs in the products ? _____3__
This reaction is therefore not balanced. Balanced equations indicate that matter can not be
created nor destroyed.
5. (1pt each)
a) SR, element replaces another element that was part of a compound Follows A + BZ  AZ + B
b) DR, two compounds reacting to form two new compounds. Follows AZ + BY -> AY + BZ
c)DEC – single reactant forms multiple products AB  A + B
d) Syn, - single product type formed
A + B  AB
6. Balance the following reaction and identify what type of reaction it is and why? 3pts
___2__ C6H14 (g) + __19___ O2 (g) -----> ___12___ CO2 (g) + __14___ H2O (g)
a) Type of reaction: _____CC______________ Why?2pts
Hydrocarbon reacts with oxygen and combusts to from carbon dioxide and water
___CnHn + ___O2  ___CO2 + H2O
b) How does the potential energy of the C6H14 (g) + O2 (g) compare to the potential energy of
the CO2 (g) + H2O (g). How do you know this? What is the primary purpose of this type of
reaction? 3pts Since their is a release of energy the potential energy of the hexane and
oxygen are greater than the potential energy of the carbon dioxide and water. The primary
purpose of this reaction is to release energy in order to heat or propel an object.
c) What has a greater affinity for hemoglobin 1pt
a) oxygen
b) nitrogen c) carbon dioxide
d) carbon monoxide
d) Why is it important to know this? 2pts
Because hemoglobin has a greater affinity for CO it will not transport oxygen to our cells which
quickly die without a supply of oxygen.
6. a) Na2C2O4 sodium oxalate b) MnBr2 manganese(II)bromide c) P2O5 diphosphorous pentaoxide
d) HCl hydrochloric acid
a) sulfurous acid H2SO3
e) HClO4 perchloric acid f) HClO hypochlorous acid
b) nitric acid
HNO3 c) hydrosulfuric acid H2S
d) cesium sulfide Cs2S e) Vanadium (III) oxide V2O3
f) ammonium sulfate (NH4)2SO4
g) dinitrogen trioxide N2O3
8. a) Finish the following word equation:
An aqueous iron (III) chloride reacts with an aqueous solution of manganese (II) hydroxide to
produce ___iron (III) hydroxide______________ and ___manganese (II) chloride_____.2pts
b) What type of reaction is it? ____DR________________ and why? 2pts
The iron ions switch with the manganese ions and therefore the hydroxide ions switch with the
chloride ions
c) Write a balanced symbol equation including subscripts, coefficients and phases. The product that
forms a precipitate is the compound containing the hydroxide ion? 12 pts
i) symbols
Fe+3 Cl -1 + Mn+2 OH-1
Fe+3 OH-1
Mn+2Cl-1
ii) symbols with subscripts: FeCl3 + Mn(OH)2 ---> Fe(OH)3 + MnCl2
iii) symbols, subscripts and coefficients 2 FeCl3 + 3Mn(OH)2 ---> 2Fe(OH)3 + 3MnCl2
iv) symbols, subscripts, coefficients, and phases of matter
2 FeCl3(aq) + 3Mn(OH)2(aq) ---> 2Fe(OH)3(s) + 3MnCl2(aq)
8. Balance the following reaction 3pts
___2___ Fe2O3 (g) -----> _4___Fe (s) + __3__ O2 (g)
Type of reaction: ____DEC________________ Why? 2pts AB A + B , the iron(III)oxide
decomposes into iron and oxygen
Decomposition because the iron (III) hydroxide is the only reactant that produces two
types of products in the solid iron and the oxygen gas
Aluminium Strip
V
Silver (Ag) Strip
Aluminium
chloride solution
Silver nitrate
solution
Porous Ceramic Container
a) Which metals is more reactive? Loses electrons? Is oxidized? Is the source of electrons? Is the negative
electrode? Is the anode? Produces Positive Ions? Mass decreases? The Al is above the silver in the
metal reactivity series and therefore is more reactive, loses electrons, is said to be oxidized, is the
source of electrons and therefore considered to be the negative electrode called the anode. The Al
will produce Al+ ions and therefore its mass will decrease.
b) Which metal is less reactive? Gains Electrons? Is Reduced? Attracts Positive Ions? Mass increases?
Is the positive electrode? Is the cathode? The Ag which is below the Al is less reactive, will gain
electrons and therefore will be reduced, will attract positive ions and therefore gain mass. It will be
the positive electrode which is called a cathode.
c) What are the “half reactions which develop a potential difference between these metals and their ions?
( Use your standard electrode potential chart ) 4pts
Al(s) --> Al3+(aq)+3e- (LEO) {Which is reverse of reaction written)
Ag+(aq) + e- ---> Ag(s)(GER)
d) What is the electrode potential between the aluminium / aluminium ions and the silver / silver
ions? 2pts
-1.66 V Aluminium  0 V  + .80 V (Silver) = 2.46 V
e) Which way do the negative ions travel through the porous ceramic container?
The electrons travel from the Al to the Ag and the negative ions travel from the Ag solution
Through the porous ceramic container to the Al solution.
f) Which way do the positive ions travel through the porous ceramic container?
The positive ions travel from the Al solution to the Ag solution through the porous ceramic
Container.
Nomenclature Review
1. Why is the name of MgCl2 magnesium chloride not:
a) magnesium (II) chloride Mg only has a +2 charge
b) magnesium dichloride prefixes are not used with metal to nonmetal compounds
c) magnesium chlorine you need to change ending to ide
d) magnesium chlorate ate endings are used for polyatomic ions
2. Why is the name of Co(NO3)3 cobalt (III) nitrate not
a) cobalt nitrate cobalt needs a roman numeral
b) cobalt (II) nitrate it picks up three nitrates not two nitrates
c) cobalt trinitrogen nano oxide it is an ionic compound and prefixes are not needed
d) cobalt (III) nitrite NO3 is a nitrate ion not a nitrite ion
3. Why is the name of Li3PO4 lithium phosphate not
a) lithium (I) phosphate Li only has a +1 charge
b) trilithium monophosphourous tetraoxide it is ionic and no prefixes are needed
c) lithium phosphide PO4 is a polyatomic not a nonmetal ion
d) lithium (III) phosphate Li only has a +1 charge
4. Why is the name of FeS2O3 iron (II) thiosulfate not
a) iron thiosulfate iron has multiple oxidation numbers therefore it needs a roman numeral
b) iron (I) thiosulfate wrong oxidation number
c) iron disulfur trioxide ionic – no prefixes
d) iron (III) sulfaten – wrong polyatomic ion
5. Why is the name CuS copper (II) sulfide not
a) copper sulfide Cu has multiple oxidation states
b) copper (I) sulfide – wrong oxidation #
c) copper (II) sulfate – it does not contain a polyatomic ion
d) copper (II) sulfite –it does not contain a polyatomic ion
6. Why can CO2 have two names ( carbon dioxide and carbon (IV) oxide)?
Nonmetal to nonmetal compounds can have prefix or roman numeral – stock system name
7. Why can P2O5 have two names phosphorous (V) oxide and diphosphorous pentoxide?
Nonmetal to nonmetal compounds can have prefix or roman numeral – stock system name
8,
Why is name of Al2O3 aluminum oxide not
a) aluminium (III) oxide – aluminum does not need a roman numeral because it has only one
oxidation number
b) dialuminium trioxide – aluminum is a metal oxygen is a nonmetal therefore it is ionic which
are named without prefixes
c) aluminium oxalate – aluminium oxide does not contain carbon found in the oxalate polyatomic
ion
d) aluminium nitrate aluminium oxide does not contain nitrogen
9. Why is the name of HF (aq) hydrofluoric acid not
a) fluoric acid – the hydro is needed because it is not an oxygen containing acid
b) fluorous acid- the hydro is needed and the ending must be ic
10. Why is the name of HClO2 (aq) chlorous acid not
a) hydrochlorous acid - hydro is not needed because it is an oxygen containing acid
b) chloric acid- ite become ous acids
c) hypochlorous acid – ClO2- is a chlorite ion
11. Why is the name of HClO4 (aq) perchloric acid not
a) hydroperchloric acid – hydro is not needed
b) perchlorous acid – ate ions become ic acids
c) hydrochloric acid- hydro is not needed and ClO4- is a perchlorate ion not a chlorate ion
12. Why is the name of C2H5OH ethanol not
a) dicarbon hexahydrogen monoxide-ethanol is an organic compound named by the number of
carbons and its functional group
b) ethanoic acid – OH is an alcohol functional group not an acid functional group
c) carbon hydrogen oxide ethanol is an organic compound named by the number of carbons and
its functional group
13. The formula of lithium sulfate is Li2SO4 not
a) Li (SO4)2 Criss cross oxidation numbers
b) Li2S – lithium sulfide
14. The formula of Copper (I) oxide is Cu2O not
a) CuO
copper (II) oxide
b) CuCO3
copper (II) carbonate
15. The formula of Iron (II) sulfite is FeSO3 not
a) Fe2(SO3)2 reduce subscripts
b) Fe2SO3 the 2 subscripts is not needed
16. The formula of nickel (III) carbonate is Ni2(CO3)3 not
a) Ni3C carbonate is CO3 not a C
b) Ni3(CO3)2 criss cross
17. The formula of hydrosulfuric acid is H2S not
a) H2SO3 sulfurous acid
a) H2SO4 sulfuric acid
18. The formula of chloric acid is HClO3 not
a) HCl hydrochloric acid
b) HClO hypochlorous acid
c) HClO2 chlorous acid
d) HClO4 perchloric acid
19. The formula of nitrous acid is HNO2 (aq) not
a) H3N (aq) NH3 nitrogen trihydride with a common name of ammonia
b) HNO3 (aq) nitric acid
20 a) What is the name of each of the following
KClO2
potassium chlorate
Cu(NO2)2
Copper (II) nitrite
BaO
barium oxide
N2O
dinitrogen monoxide
HBr(aq) hydrobromic acid
( ) 2(-2)
MnO2
manganese(IV)oxide
HNO2(aq)
nitrous acid
Ca(CN)2
calcium cyanide
H2CO3(aq)
carbonic acid
b) What is the formula of each?
Lead(II) iodide
calcium chloride
PbI2
CaCl2
hydroiodidic acid
HI(aq)
ammonium carbonate
(NH4)2CO3
strontium thiosulfate
SrS2O3
phosphoric acid
H3PO4
cobalt (III) sulfite
Co2(SO4)3
sulfurous acid
H2SO3(aq)