EQUATION WRITING: PROBLEM SET I
From the formula for each of the reactants and products, balance each of the following chemical equations.
1. Lithium(s) + Hydrogen(g) ! Lithium Hydride(s)
Li(s)
+
!
H2(g)
LiH(s)
Magnesium Oxide(s) + Carbon Dioxide(g) + Water(R)
2. Magnesium Bicarbonate(s)
Mg(HCO3)2(s)
MgO(s) + CO2(g) +
H2O(R)
3. Tin(s) + Hydrobromic Acid(aq) ! Tin (II) Bromide(aq) + Hydrogen(g)
Sn(s) +
!
HBr(aq)
SnBr2(aq)
+
H2(g)
4. Sodium Sulfate(aq) + Barium Nitrate(aq) ! Sodium Nitrate(aq) + Barium Sulfate(s)
Na2SO4(aq)
+
Ba(NO3)2(aq) !
NaNO3(aq)
+
BaSO4(s)
5. Chlorine(g) + Potassium Iodide(aq) ! Potassium Chloride(aq) + Iodine(s)
Cl2(g) +
!
KI(aq)
KCl(aq)
+
I2(s)
6. Iron(s) + Oxygen(g) ! Iron (III) Oxide(s)
Fe(s) + O2(g) !
Fe2O3(s)
7. Calcium Chlorate(R)
Ca(ClO3)2(R)
Calcium Chloride(s) + Oxygen(g)
CaCl2(s)
+
O2(g)
8. Silver(s) + Gold (III) Chloride(aq) ! Silver Chloride(s) + Gold(s)
Ag(s) +
AuCl3(aq)
!
AgCl(s) +
Au(s)
9. Sodium Phosphate(aq) + Magnesium Bromide(aq) ! Magnesium Phosphate(s) + Sodium Bromide(aq)
Na3PO4(aq) +
MgBr2(aq) !
10. Potassium Hydroxide(R)
KOH(R)
Mg3(PO4)2(s) +
NaBr(aq)
Potassium(R) + Hydrogen(g) + Oxygen(g)
K(R) +
H2(g)
+
O2(g)
EQUATION WRITING: PROBLEM SET II
PART I.
From the names of the substances given in each of the following reactions, write the correct
formulas and balance the equation.
1. Sodium(s) + Sulfur(s) ! Sodium Sulfide(s)
2. Potassium Chlorate(R)
Potassium Chloride(s) + Oxygen(g)
3. Calcium Carbonate(s)
Calcium Oxide(s) + Carbon Dioxide(g)
4. Barium Oxide(s) + Water(R) ! Barium Hydroxide(aq)
5. Iron(s) + Chlorine(g) ! Iron (III) Chloride(s)
PART II.
Predict the products, complete the word equation, write the correct formulas for each of the
reactants and products, and balance the formula equation for each of the following reactions.
6. Aluminum(s) + Oxygen(g) !
7. Zinc(s) + Carbon(s) !
8. Sodium Chloride(R)
_________________ + Chlorine(g)
9. Lithium Chlorate(R)
Lithium Chloride(s) + _______________
10. Zinc Carbonate(s)
Zinc Oxide + ___________________
ANSWERS, EQUATION WRITING: PROBLEM SETS I & II
Problem Set I
1. 2Li(s) + H2(g) ! 2LiH(s)
2. Mg(HCO3)2(s) ! MgO(s) + 2CO2(g) + H2O(R)
3. Sn(s) + 2HBr(aq) ! SnBr2(aq) + H2(g)
4. Na2SO4(aq) + Ba(NO3)2(aq) ! 2NaNO3(aq) + BaSO4(s)
5. Cl2(g) + 2KI(aq) ! 2KCl(aq) + I2(s)
6. 4Fe(s) + 3O2(g) ! 2Fe2O3(s)
7. Ca(ClO3)2(R) ! CaCl2(s) + 3O2(g)
8. 3Ag(s) + AuCl3(aq) ! 3AgCl(s) + Au(s)
9. 2Na3PO4(aq) + 3MgBr2(aq) ! 6NaBr(aq) + Mg3(PO4)2(s)
10. 2KOH(R) ! 2K(R) + O2(g) + H2(g)
Problem Set II
1. 2Na(s) + S(s) ! Na2S(s)
2. 2KClO3(R) ! 2KCl(s) + 3O2(g)
3. CaCO3(s) ! CaO(s) + CO2(g)
4. BaO(s) + H2O(R) ! Ba(OH)2(aq)
5. 2Fe(s) + 3Cl2(g) ! 2FeCl3(s)
6. Aluminum(s) + Oxygen(g) ! Aluminum Oxide(s)
4Al(s) + 3O2(g) ! 2Al2O3(s)
7. Zinc(s) + Carbon(s) ! Zinc Carbide(s)
2Zn(s) + C(s) ! Zn2C(s)
8. Sodium Chloride(R) ! Sodium(s) + Chlorine(g)
2NaCl(R) ! 2Na(R) + Cl2(g)
9. Lithium Chlorate(R) ! Lithium Chloride(s) + Oxygen(g)
2LiClO3(R) ! 2LiCl(s) + 3O2(g)
10. Zinc Carbonate(s) ! Zinc Oxide(s) + Carbon Dioxide(g)
ZnCO3(s) + heat ! ZnO(s) + CO2(g)
EQUATION WRITING: PROBLEM SET III
PART I.
From the names of the substances given in each of the following reactions, write the correct
formulas and balance the equation.
1. Cobalt(s) + Chromium (III) Sulfate(aq) ! Cobalt (II) Sulfate(aq) + Chromium(s)
2. Fluorine(g) + Aluminum Chloride(aq) ! Aluminum Fluoride(aq) + Chlorine(g)
3. Iron(s) + Sulfuric Acid(aq) ! Iron (II) Sulfate(aq) + Hydrogen(g)
4. Manganese(s) + Dimercury (I) Nitrate(aq) !Manganese (II) Nitrate(aq) + Mercury(R)
5. Bromine(R) + Lithium Iodide(aq) ! Lithium Bromide(aq) + Iodine(s)
PART II.
Predict the products, complete the word equation, write the correct formulas for each of the
reactants and products, and balance the formula equation for each of the following reactions.
6. Nickel(s) + Hydrochloric Acid(aq) ! Nickel (II) Chloride(aq) + ____________
7. Zinc(s) + Chromium (III) Acetate(aq) ! ____________ + ____________
8. Chlorine(g) + Ammonium Bromide(aq) ! Ammonium Chloride(aq) + ____________
9. Barium(s) + Nitric Acid(aq) ! ____________ + ____________
10. Fluorine(g) + Sodium Iodide(aq) ! ____________ + ____________
EQUATION WRITING: PROBLEM SET IV
PART I.
From the names of the substances given in each of the following reactions, write the correct
formulas and balance the equation.
1. Nickel (II) Nitrate(aq) + Sodium Phosphate(aq) ! Nickel (II) Phosphate(s) + Sodium Nitrate(aq)
2. Chromium (III) Chloride(aq) + Lithium Hydroxide(aq) !
Chromium (III) Hydroxide(s) + Lithium Chloride(aq)
3. Strontium Bromide(aq) + Ammonium Carbonate(aq) !
Strontium Carbonate(s) + Ammonium Bromide(aq)
4. Cesium Oxalate(aq) + Lead (II) Nitrate(aq) ! Cesium Nitrate(aq) + Lead (II) Oxalate(s)
5. Potassium Sulfite(aq) + Iron (III) Acetate(aq) ! Potassium Acetate(aq) + Iron (III) Sulfite(s)
PART II.
Predict the products, complete the word equation, write the correct formulas for each of the
reactants and products, and balance the formula equation for each of the following reactions.
6. Barium Hydroxide(aq) + Magnesium Chloride(aq) !
7. Silver Nitrate(aq) + Ammonium Sulfide(aq) !
8. Mercury (II) Chloride(aq) + Sodium Carbonate(aq) !
9. Potassium Phosphate(aq) + Zinc Acetate(aq) !
10. Iron (III) Bromide(aq) + Calcium Chromate(aq) !
ANSWERS, EQUATION WRITING: PROBLEM SETS III & IV
Problem Set III
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
3Co(s) + Cr2(SO4)3(aq) ! 3CoSO4(aq) + 2Cr(s)
3F2(g) + 2AlCl3(aq) ! 2AlF3(aq) + 3Cl2(g)
Fe(s) + H2SO4(aq) ! FeSO4(aq) + H2(g)
Mn(s) + Hg2(NO3)2(aq) ! Mn(NO3)2(aq) + 2Hg(R)
Br2(R) + 2LiI(aq) ! 2LiBr(aq) + I2(s)
Nickel(s) + Hydrochloric Acid(aq) ! Nickel (II) Chloride(aq) + Hydrogen(g)
Ni(s) + 2HCl(aq) ! NiCl2(aq) + H2(g)
Zinc(s) + Chromium (III) Acetate(aq) ! Zinc Acetate(aq) + Chromium(s)
3Zn(s) + 2Cr(CH3COO)3(aq) ! 3Zn(CH3COO)2(aq) + 2Cr(s)
Chlorine(g) + Ammonium Bromide(aq) ! Ammonium Chloride(aq) + Bromine(R)
Cl2(g) + 2NH4Br(aq) ! 2NH4Cl(aq) + Br2(R)
Barium(s) + Nitric Acid(aq) ! Barium Nitrate(aq) + Hydrogen(g)
Ba(s) + 2HNO3(aq) ! Ba(NO3)2(aq) + H2(g)
Fluorine(g) + Sodium Iodide(aq) ! Sodium Fluoride(aq) + Iodine(s)
F2(g) + 2NaI(aq) ! 2NaF(aq) + I2(s)
Problem Set IV
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
3Ni(NO3)2(aq) + 2Na3PO4(aq) ! Ni3(PO4)2(s) + 6NaNO3(aq)
CrCl3(aq) + 3LiOH(aq) ! Cr(OH)3(s) + 3LiCl(aq)
SrBr2(aq) + (NH4)2CO3(aq) ! SrCO3(s) + 2NH4Br(aq)
Cs2C2O4(aq) + Pb(NO3)2(aq) ! 2CsNO3(aq) + PbC2O4(s)
3K2SO3(aq) + 2Fe(C2H3O2)3(aq) ! 6KC2H3O2(aq) + Fe2(SO3)3(s)
Barium Hydroxide(aq) + Magnesium Chloride(aq) !
Barium Chloride(aq) + Magnesium Hyroxide (s)
Ba(OH)2(aq) + MgCl2(aq) ! BaCl2(aq) + Mg(OH)2(s)
Silver Nitrate(aq) + Ammonium Sulfide(aq) !Silver Sulfide(s) + Ammonium Nitrate(aq)
2AgNO3(aq) + (NH4)2S(aq) ! Ag2S(s) + 2NH4NO3(aq)
Mercury (II) Chloride(aq) + Sodium Carbonate(aq) !
Mercury (II) Carbonate(s) + Sodium Chloride(aq)
HgCl2(aq) + Na2CO3(aq) ! HgCO3(s) + 2NaCl(aq)
Potassium Phosphate(aq) + Zinc Acetate(aq) !Potassium Acetate(aq) + Zinc Phosphate(s)
2K3PO4(aq) + 3Zn(CH3COO)2(aq) ! 6KCH3COO(aq) + Zn3(PO4)2(s)
Iron (III) Bromide(aq) + Calcium Chromate(aq) !
Iron (III) Chromate(s) + Calcium Bromide(aq)
2FeBr3(aq) + 3CaCrO4(aq) ! Fe2(CrO4)3(s) + 3CaBr2(aq)
EQUATION WRITING: PROBLEM SET V
Predict the products, complete the word equation, write the correct formulas for each of the reactants and
products, and balance the formula equation for each of the following reactions.
1. Sodium Carbonate(aq) + Sulfuric Acid(aq) !
2. Copper (II) Sulfite(s) + Hydrochloric Acid(aq) !
3. Zinc Bicarbonate(s) + Nitric Acid(aq) !
4. Cupric Oxide(s) + Hydrobromic Acid(aq) !
5. Iron (III) Hydroxide(s) + Acetic Acid(aq) !
6. Silver Carbonate(s) + Nitric Acid(aq) !
7. Potassium Bisulfite(aq) + Hydrochloric Acid(aq) !
8. Aluminum Oxide(s) + Sulfuric Acid(aq) !
9. Barium Hydroxide(aq) + Phosphoric Acid(aq) !
10. Lead Hydrogen Carbonate(s) + Acetic Acid(aq) !
EQUATION WRITING: PROBLEM SET VI
Balance each of the following reactions by (1) completing the word equation, (2) determining the state (solid,
liquid, gas, aqueous solution) for each of the reactants and products, (3) if no reaction occurs (both products
are soluble), write "no reaction" and proceed with the next problem, (4) if there is a reaction, give the correct
formula for each reactant and product, balance the equation, give the ionic equation, eliminate the "spectator
ions" and finally, give the net ionic equation for the reaction.
1. Zinc Acetate(aq) + Sodium Hydroxide(aq) !
2. Sodium Phosphate(aq) + Calcium Chloride(aq) !
3. Iron (III) Oxide(s) + Nitric Acid(aq) !
4. Calcium Carbonate(s) + Hydrochloric Acid(aq) !
5. Zinc(s) + Lead (II) Nitrate(aq) !
6. Mercury (II) Chloride(aq) + Sodium Iodide(aq) !
7. Magnesium Acetate(aq) + Potassium Sulfate(aq) !
8. Chlorine(g) + Ammonium Bromide(aq) !
9. Copper (II) Hydroxide(s) + Sulfuric Acid(aq) !
10. Barium Nitrate(aq) + Aluminum Chloride(aq) !
ANSWERS, EQUATION WRITING: PROBLEM SETS V & VI
PROBLEM SET V
1. Na2CO3(aq) + H2SO4(aq) ! Na2SO4(aq) + CO2(g) + H2O(R)
2. CuSO3(s) + 2HCl(aq) ! CuCl2(aq) + SO2(g) + H2O(R)
3. Zn(HCO3)2(s) + 2HNO3(aq) ! Zn(NO3)2(aq) + 2CO2(g) + 2H2O(R)
4. CuO(s) + 2HBr(aq) ! CuBr2(aq) + H2O(R)
5. Fe(OH)3(s) + 3HC2H3O2(aq) ! Fe(C2H3O2)3(aq) + 3H2O(R)
6. Ag2CO3(s) + 2HNO3(aq) ! 2AgNO3(aq) + CO2(g) + H2O(R)
7. KHSO3(aq) + HCl(aq) ! KCl(aq) + SO2(g) + H2O(R)
8. Al2O3(s) + 3H2SO4(aq) ! Al2(SO4)3(aq) + 3H2O(R)
9. 3Ba(OH)2(aq) + 2H3PO4(aq) ! Ba3(PO4)2(s) + 6H2O(R)
10. Pb(HCO3)2(s) + 2HCH3COO(aq) ! Pb(CH3COO)2(aq) + 2CO2(g) + 2H2O(R)
PROBLEM SET VI
1. Zn(CH3COO)2(aq) + 2NaOH(aq) ! Zn(OH)2(s) + 2NaCH3COO(aq)
Zn2+(aq) + 2OH-(aq) ! Zn(OH)2(s)
2. 2Na3PO4(aq) + 3CaCl2(aq) ! 6NaCl(aq) + Ca3(PO4)2(s)
2PO43-(aq) + 3Ca2+(aq) ! Ca3(PO4)2(s)
3. Fe2O3(s) + 6HNO3(aq) ! 2Fe(NO3)3(aq) + 3H2O(R)
Fe2O3(s) + 6H+(aq) ! 2Fe3+(aq) + 3H2O(R)
4. CaCO3(s) + 2HCl(aq) ! CaCl2(aq) + CO2(g) + H2O(R)
CaCO3(s) + 2H+(aq) ! Ca2+(aq) + CO2(g) + H2O(R)
5. Zn(s) + Pb(NO3)2(aq) ! Zn(NO3)2(aq) + Pb(s)
Zn(s) + Pb2+(aq) ! Zn2+(aq) + Pb(s)
6. HgCl2(aq) + 2NaI(aq) ! HgI2(s) + 2NaCl(aq)
Hg2+(aq) + 2I-(aq) ! HgI2(s)
7. Mg(CH3COO)2(aq) + K2SO4(aq) ! MgSO4(aq) + 2KCH3COO(aq) "no reaction"
8. Cl2(g) + 2NH4Br(aq) ! 2NH4Cl(aq) + Br2(R)
Cl2(g) + 2Br-(aq) ! 2Cl-(aq) + Br2(R)
9. Cu(OH)2(s) + H2SO4(aq) ! CuSO4(aq) + 2H2O(R)
Cu(OH)2(s) + 2H+(aq) ! Cu2+(aq) + 2H2O(R)
10. 3Ba(NO3)2(aq) + 2AlCl3(aq) ! 3BaCl2(aq) + 3Al(NO3)3(aq)
"no reaction"
EQUATION WRITING: PROBLEM SET VII
Complete each of the following reactions by naming the products, if necessary, to complete the word
equation. Give the formula for any missing reactant or product and balance the formula equation for each of
the following reactions:
1. Sodium(s) + Water(R) ! Sodium Hydroxide(aq) + Hydrogen(g)
Na(s) + H2O(R) !
NaOH(aq)
+ _______(g)
2. Methane(g) + Oxygen(g) ! Carbon Dioxide(g) + Water(R)
CH4(g) + _____(g) !
CO2(g)
+ _______(R)
3. Ammonia(g) + Oxygen(g) ! Nitric Acid(R) + Water(R)
HNO3(R)
NH3(g) + _____(g) !
+ _____(R)
4. Sulfur Dioxide(g) + Oxygen(g) ! Sulfur Trioxide(R)
SO2(g)
SO3(R)
+ O2(g) !
5. Copper(s) + Sulfuric Acid(aq) ! Copper(II) Sulfate + Sulfur Dioxide(g) + Water(R)
Cu(s) +
H2SO4(aq)
! _____________(aq) + __________(g) + H2O(R)
6. Calcium(s) + Water(R) ! Calcium Hydroxide(aq)
Ca(s) + H2O(R) !
Ca(OH)2(s)
7. Iron (II) Sulfide(s) + Oxygen(g) ! Iron (III) Oxide(s) + Sulfur Dioxide(g)
FeS(s)
+ ____(g) !
Fe2O3(s)
+ _________(g)
8. Ethane(g) + Oxygen(g) ! Carbon Dioxide(g) + Water(R)
C2H6(g) + O2(g) !
_______(g)
+ H2O(R)
9. Propane(g) + Oxygen(g) !
C3H8(g) + O2(g) !
10. Magnesium Hydride(s) + Water(R) ! Magnesium Hydroxide(s) + Hydrogen(g)
EQUATION WRITING: PROBLEM SET VIII
Complete each of the following reactions by naming the products, if necessary, to complete the word
equation. Give the formula for any missing reactant or product and balance the formula equation for each of
the following reactions:
1. Butane(g) + Oxygen(g) ! Carbon Dioxide(g) +
C4H10(g) + O2(g) !
2. Methanol(R) + Oxygen(g) ! Carbon Dioxide(g) + Water(R)
CH3OH(R) +
3. Ethanol(R) + Oxygen(g) !
C2H5OH(R) +
4. Acetylene(g) + Oxygen(g) !
C2H2(g)
+
5. Silicon Dioxide(s) + Carbon(s) ! Silicon Carbide(s) + Carbon Monoxide(g)
SiO2(s)
+ C(s) !
SiC(s)
+
CO(g)
6. Copper (I) Sulfide(s) + Oxygen(g) ! Copper (I) Oxide(s) + Sulfur Dioxide(g)
Cu2S(s)
+ ____(g) !
__________(s) +
________(g)
7. Iron (III) Oxide(s) + Hydrogen(g) ! Iron(s) + Water(R)
Fe2O3(s)
+ _____(g) ! Fe(s) + _____(R)
8. Hydrogen Sulfide(g) + Oxygen(g) ! Sulfur(s) + Water(R)
H2S(g)
+ _____(g) !
S(s) + _____(R)
9. Magnesium Nitride(s) + Water(R) ! Magnesium Hydroxide(s) + Ammonia(aq)
Mg3N2(s)
+ H2O(R) !
10. Ammonia(g) + Oxygen(g) ! Nitrogen (II) Oxide(g) + Water(R)
ANSWERS, EQUATION WRITING: PROBLEM SETS VII & VIII
PROBLEM SET VII
1. 2Na(s) + 2H2O(R) ! 2NaOH(aq) + H2(g)
2. CH4(g) + 2O2(g) ! CO2(g) + 2H2O(R)
3. 2NH3(g) + 4O2(g) ! 2HNO3(R) + 2H2O(R)
4. 2SO2(g) + O2(g) ! 2SO3(R)
5. Cu(s) + 2H2SO4(aq) ! CuSO4(aq) + SO2(g) + 2H2O(R)
6. Ca(s) + H2O(R) ! Ca(OH)2(s)
7. 4FeS(s) + 7O2(g) ! 2Fe2O3(s) + 4SO2(g)
8. 2C2H6(g) + 7O2(g) ! 4CO2(g) + 6H2O(R)
9. C3H8(g) + 5O2(g) ! 3CO2(g) + 4H2O(R)
10. MgH2(s) + 2H2O(R) ! Mg(OH)2(s) + 2H2(g)
PROBLEM SET VIII
1. 2C4H10(g) + 13O2(g) ! 8CO2(g) + 10H2O(R)
2. 2CH3OH(R) + 3O2(g) ! 2CO2(g) + 4H2O(R)
3. C2H5OH(R) + 3O2(g) ! 2CO2(g) + 3H2O(R)
4. 2C2H2(g) + 5O2(g) ! 4CO2(g) + 2H2O(R)
5. SiO2(s) + 3C(s) ! SiC(s) + 2CO(g)
6. 2Cu2S(s) + 3O2(g) ! 2Cu2O(s) + 2SO2(g)
7. Fe2O3(s) + 3H2(g) ! 2Fe(s) + 3H2O(R)
8. 2H2S(g) + O2(g) ! 2S(s) + 2H2O(R)
9. Mg3N2(s) + 6H2O(R) ! 3Mg(OH)2(s) + 2NH3(aq)
10. 4NH3(g) + 5O2(g) ! 4NO(g) + 6H2O(R)