Balancing 1

Balance the Following

  1. 2N2H4 + N2O4 → 3N2 + 4H2O
  2. 3C2H5OH + PBr3 → 3C2H5Br + H3PO3
  3. 4FeS + 7O2 + 4H2O → 2Fe2O3 + 4H2SO4
  4. 2KNO3 + 3C + S → K2S + N2 + 3CO2
  5. Ca(OH)2 + (NH4)2SO4 → CaSO4 + 2H2O + 2NH3
  6. Cu + 2H2SO4 → CuSO4 + 2H2O + SO2
  7. 3CaO + P2O5 → Ca3(PO4)2
  8. MnO2 + 4HCl → 2H2O + MnCl2 + Cl2
  9. 2H2S + 3O2 → 2SO2 + 2H2O
  10. 5KClO3 + 3C2H4O → 6CO2 + 5KCl + 6H2O

Balancing 2

Please change the following word equations into formula equations and balance them

1. solid copper plus solid sulfur makes solid copper (I) sulfide

2Cu(s) + S(s)Cu2S(s)

2. phosphoric acid plus calcium hydroxide makes solid calcium phosphate plus water

2H3PO4(aq) + 3Ca(OH)2 (aq)Ca3(PO4)2(s) + 6H2O(l)

3. solid silver oxide makes solid silver plus oxygen gas

2Ag2O(s) 4Ag(s) + O2(g)

4. solid iron (III) chloride plus sodium hydroxide makes solid iron (III) hydroxide plus aqueous sodium chloride

FeCl3(s) + 3NaOH(aq)  Fe(OH)3(s) + 3NaCl(aq)

5. solid nickel (II) phosphate plus sulfuric acid makes solid nickel (II) sulfate plus phosphoric acid

Ni3(PO4)2(s) + 3H2SO4(aq)  3NiSO4(s) + 2H3PO4(aq)

6. solid zinc carbonate plus hydrochloric acid makes solid zinc chloride plus water plus carbon dioxide

ZnCO3(s) + 2HCl(aq)  ZnCl2(s) + H2O(l) + CO2(g)

7. aqueous silver nitrate plus aqueous aluminum chloride makes solid silver chloride plus aqueous aluminum nitrate

3AgNO3(aq) + AlCl3(aq)  3AgCl(s) + Al(NO3)3(aq)

8. acetic acid plus potassium hydroxide makes aqueous potassium acetate plus water

HC2H3O2(aq) + KOH(aq)  KC2H3O2(aq)+ H2O(l)

9. solid phosphorus plus gaseous iodide makes gaseous phosphorus triodide

2P(s) + 3I2(g)  2PI3

10. solid aluminum plus aqueous cupric sulfate makes solid copper plus aqueous aluminum sulfate

2Al(s) + 3CuSO4(aq) 3Cu(s) + Al2(SO4)3(aq)

1 of 14

Name______C8 Supplemental Packet Fixed Key Date______

Combination Reactions

  1. Complete and balance each of the following
  1. COMbination reactions. Name the product.

1. lithium solid and iodine gas  Lithium iodide

2 Li(s) + I2(g) 2 LiI(s)

2. magnesium solid and nitrogen gas 

Magnesium nitride

3Mg(s) + N2(g)  Mg3N2(s)

3. sulfur dioxide gas and water  Sulfurous acid

SO2(g) + H2O(/)  H2SO3(aq)

4. aluminum solid and chlorine gas 

Aluminum chloride

2Al(s) + 3Cl2(g)  2 AlCl3(s)

5. lead solid and bromine liquid 

Lead (II) bromide and Lead (IV) bromide

Pb(s) + Br2(/)  PbBr2(s)

Pb(s) + 2Br2(/)  PbBr4(s)

6. iron (III) oxide solid and liquid water 

Iron(III) hydroxide

Fe2O3(s) + 3H2O(/) 2Fe(OH)3(aq)

7. carbon dioxide gas and liquid water 

Carbonic acid

CO2(g) + H2O(/)  H2CO3(aq)

8. sulfur solid and oxygen gas 

Sulfur dioxide

S8(s) +8O2(g)  8SO2(g)

S8(s) + 12O2(g)  8SO3(g)

9. lead (II) oxide and oxygen gas 

Lead (IV) oxide

2PbO(s) + O2(g)  2PbO2

10. Sn(s) + Br2(l)  SnBr2(s)

Sn(s) + 2Br2(l)  SnBr4(s)

Tin solid plus liquid bromine 

Stannous bromide & Stannic Bromide

11. 2CuCl(l) + Cl2(g)  2CuCl2(s)

Cuprous chloride liquid plus chlorine gas

makes Cupric chloride

12. P2O5(g) + 3H2O(l)  2H3PO4

diphosphorus pentoxide and water

→phosphoric acid

13. 2Fe(s) + O2(g)  2FeO

4Fe(s) + 2O2(g)  2Fe2O2(s)

Iron solid plus oxygen gas

→ Ferrous Oxide & Ferric Oxide

14. BaO(s) + H2O(l)  Ba(OH)2(aq)

Barium oxide solid plusliquid water

→ barium hydroxide

15. 3Ag(s) + P(s) Ag3P(s)

Silver solid and phosphorus solid

→ Silver Phosphide

16. N2O5(g) + H2O(l)  2HNO3(aq)

Dinitrogen pentoxide gas plusliquid water

→ Nitric Acid

17. 4Ga(s) + 3O2(g)  2Ga2O3(s)

Gallium solid plus oxygen gas

→ gallium oxide solid

18. K2O(s) + H2O(l)  2KOH(aq)

Potassium oxide solid plus water

 potassium hydroxide

Decomposition Reactions

  1. Complete and balance each of the following
  2. DECOMPOSITION reactions. Name the product.

↓↓Use Classic Names↓↓

1. zinc carbonate solid

zinc oxide solid plus carbon dioxide gas

ZnCO3(s) ZnO(s) + CO2(g)

2. barium chlorate solid

Barium chloride solid plus oxygen gas

Ba(ClO3)2(s) BaCl2(s) + 3O2(g)

3. ferrous oxide solid

iron solid plus oxygen gas

2FeO(s) 2Fe(s) + O2(g)

4. aqueous barium hydroxide

barium oxide solid plus liquid water

Ba(OH)2(aq) BaO(s) + H2O(l)

5. barium chloride dihydrate solid

barium chloride solid plus liquid water

BaCl2• 2H2O(s) BaCl2(s) + 2H2O(l)

6. cuprous carbonate solid

Cuprous oxide solid plus carbon dioxide gas

Cu2CO3(s) Cu2O(s) + CO2(g)

7. aqueous strontium hydroxide

strontium oxide solid plus liquid water

Sr(OH)2(aq) SrO(s) + H2O(l)

8. aqueous sulfuric acid

sulfur trioxide gas plus liquid water

H2SO4(aq) SO3(g) + H2O(l)

9. mercuric oxidesolid

mercury liquid plus oxygen gas

2HgO(s)2Hg(l) + O2(g)

10. aluminum chloratesolid

Aluminum chloride solid plus oxygen gas

2Al(ClO3)3(s) 2AlCl3(s) + 9O2(g)

↓↓Use Stock Names↓↓

11. aqueous chromium (III) hydroxide

chromium(III) oxide solid plus liquid water

Cr(OH)3(aq) Cr2O3(s) + H2O(l)

12. aqueous hypochlorous acid

dichlorine oxide plus liquid water

2HClO(aq) Cl2O(g) + H2O(l)

13. aluminum carbonate solid

aluminum oxide solid plus carbon dioxide gas

Al2(CO3)2(s) Al2O3(s) + 3CO2(g)

14. barium bromide octahydrate solid

barium bromide solid plus liquid water

BaBr2• 8H2O(s) BaBr2(s) + 8H2O(l)

15. aqueous Potassium hydroxide

Potassium oxide solid plus liquid water

2KOH(aq) K2O(s) + H2O(l)

16. tin (IV) chloride solid

tin solid plus chlorine gas

SnCl4(s)Sn(s) + 2Cl2(g)

17. potassium chloratesolid

potassium chloride solid plus oxygen gas

2KClO3(s) 2KCl(s) + 3O2(g)

18. copper (II) sulfate pentahydratesolid

Copper (II) sulfate solid plus liquid water

CuSO4(s) •5H2O(s) CuSO4(s) + 5H2O(l)

19. sodium chloride solid

sodium solid plus chlorine gas

NaCl(s) Na(s) + Cl2(g)

20. aqueous sulfurous acid

Sulfur dioxide gas plus liquid water

H2SO3(aq) SO2(g) + H2O(l)

Single Replacement Reactions

1. aqueous calcium chloride and strontium 

aqueous strontium chloride plus calcium solid

CaCl2(aq) + Sr(s)  SrCl2(aq) + Ca(s)

2. sodium fluoride and chlorine  NR

3. aluminum solid and aqueous ferric oxide 

aluminum oxide aqueous plus iron solid

2Al(s) + Fe2O3(aq)  Al2O3(aq) + 2Fe(s)

4. aqueous Tin (IV) chloride and sodium solid

tin solid plus aqueous sodium chloride

SnCl4(aq) + 4Na(s)  Sn(s) + 4NaCl(aq)

5. hydrochloric acid and cadmium solid 

hydrogen gas and aqueous cadmium chloride

2HCl(aq) + Cd(s)  H2(g) + CdCl2(aq)

6. manganese solid and aqueous mercuric chloride 

aqueous manganese(II) chloride plus liquid mercury

2Mn(s) + 2HgCl2(aq)  2MnCl2(aq) + Hg2(l)

manganese solid and aqueous mercuric chloride 

aqueous manganese(III) chloride plus liquid mercury

4Mn(s) + 6HgCl2(aq)  4MnCl3(aq) + 3Hg2(l)

7. solid calcium and water 

aqueous calcium oxide plus hydrogen gas

Ca(s) + H2O(l)  CaO(aq) + H2(g)

8. solid magnesium and aqueous copper (II) bromide 

Magnesium bromide aqueous plus solid copper

Mg(s) + CuBr2(aq)  MgBr2(aq) + Cu(s)

9. aqueous copper (II) oxide and hydrogen gas 

solid copper plus liquid water

CuO(aq)+ H2(g)  Cu(s) + H2O(l)

10. hydrobromic acid and barium 

hydrogen gas plus aqueous barium bromide

2HBr(aq) + Ba(s)  H2(g) + BaBr2(aq)

11. copper solid and aqueous silver nitrate 

aqueous copper(I) nitrate plus solid silver

Cu(s) + AgNO3(aq)  CuNO3(aq) + Ag(s)

copper solid and aqueous silver nitrate 

aqueous copper (II) nitrate plus solid silver

Cu(s) + 2AgNO3(aq)  Cu(NO3)2(aq) + 2Ag(s)

12. fluorine gas and aqueous sodium bromide 

aqueous sodium fluoride plus liquid bromine

F2(g) + NaBr(aq)  NaF(aq) + Br2(l)

13. aqueous lead (II) sulfate and solid nickel 

solid lead plus aqueous nickel sulfate

PbSO4 (aq) + Ni(s)  Pb(s) + NiSO4(aq)

DOUBLE REPLACEMENT

A. Complete, balance, and name the products for each of the following DOUBLE REPLACEMENT reactions.

1. aqueous Sodium chloride + aqueous Sulfurous acid  NR

2. aqueous Barium chloride + aqueous Potassium carbonate 

solid barium carbonate and aqueous potassium chloride

BaCl2(aq) + K2CO3(aq) BaCO3(s) + 2KCl(aq)

3. aqueous Iron (II) sulfide + aqueous Hydrochloric acid  NR

FeS(aq) + HCl(aq) FeCl2(aq) + H2S(aq)

4. aqueous Strontium bromide + aqueous Ammonium carbonate 

solid strontium carbonate plus aqueous aluminum bromide

SrBr2(aq)+ (NH4)2CO3(aq)  SrCO3(s) + 2NH4Br(aq)

5. aqueous Sodium iodide + aqueous Lead (II) nitrate 

aqueous sodium nitrate plus Lead solid (II) iodide

2NaI(aq) + Pb(NO3)2(aq)  2NaNO3(aq) + PbI2(s)

6. aqueous Aluminum sulfate + aqueous

Calcium hydroxide  solid aluminum hydroxide plus aqueous calcium sulfate

Al2(SO4)3(aq) + 3Ca(OH)2(aq)  2Al(OH)3(s) + 3CaSO4(aq)

7. aqueous Sodium carbonate + aqueous Calcium hydroxide

aqueous sodium hydroxide plus solid calcium carbonate

Na2CO3(aq) + Ca(OH)2 2NaOH(aq) + CaCO3(s)

8. aqueous Barium nitrate + aqueous Sodium hydroxide NR
Ba(NO3)2(aq) + NaOH(aq)  NaNO3(aq) + Ba(OH)2(aq)

9. aqueous Strontium hydroxide + aqueous Sodium sulfite 

solid strontium sulfite plus aqueous sodium hydroxide

Sr(OH)2(aq) + Na2SO3(aq)  SrSO3(s) + 2NaOH(aq)

10. aqueous Potassium sulfite + aqueous Sodium chloride  NR

K2SO3(aq) + NaCl(aq)  KCl(aq) + Na2SO3(aq)

11. aqueous Ammonium chloride + aqueous Silver sulfate 

aqueous ammonium sulfate plus solid silver chloride

2NH4Cl(aq) + Ag2SO4(aq)  (NH4)2SO4(aq) + 2AgCl(s)

12. aqueous Barium chloride + aqueous Sodium sulfite

solid barium sulfite plus aqueous sodium chloride

BaCl2(aq) + Na2SO3(aq)  BaSO3(s) + 2NaCl(aq)

13. aqueous Sodium hydroxide + aqueous ammonium chloride NR

NaOH(aq) + NH4Cl(aq)  NaCl(aq) + NH4OH(aq)

└NH3(g) + H2O(l)

14. aqueous Barium nitrate + aqueous Sulfuric acid 

solid barium sulfate plus aqueous nitric acid

Ba(NO3)2(aq) + H2SO4(aq)  BaSO4(s) + 2HNO3(aq)

15. aqueous Cupric nitrate + aqueous Potassium sulfite

solid cupric sulfite and aqueous potassium nitrate

Cu(NO3)2(aq) + KSO3(aq)  CuSO3(s) + KNO3(aq)

Acid – Base Neutralization

Write complete balanced formula equations and name the products for the following:

1.aqueous Sodium Hydroxide + aqueousNitric Acid →

aqueousSodium Nitrate + liquid Water

NaOH(aq) + HNO3(aq) → NaNO3(aq) + H2O(l)

2.aqueous Ferric Hydroxide + aqueous Oxalic Acid →

aqueous Ferric Oxalate + liquid Water

2 Fe(OH)3(aq) + 3 H2C2O4(aq) → Fe2(C2O4) 3(aq) + 6 H2O(l)

3.aqueous Phosphoric Acid + aqueous Aluminum Hydroxide →

aqueous Aluminum Phosphate + liquid Water

H3PO4(aq) + Al(OH)3(aq) → AlPO4(aq) + 3 H2O(l)

4.aqueous Hydrochloric Acid + aqueous Rubidium Hydroxide →

aqueous Rubidium Chloride + liquid Water

HCl(aq) + RbOH(aq) → RbCl(aq) + H2O(l)

5.aqueous Perchloric Acid + aqueous Sodium Hydroxide →

aqueous Sodium Perchlorate + liquid Water

HClO4(aq) + NaOH(aq) → NaClO4(aq) + H2O(l)

6.aqueous Sulfuric Acid + aqueous Cesium Hydroxide →

aqueous Cesium Sulfate + liquid Water

H2SO4(aq) + 2 CsOH(aq) → Cs2SO4(aq) + 2 H2O(l)

7.aqueousCalcium oxide + aqueous Hydrobromic Acid →

aqueous Calcium Bromide + Water

CaO(aq) + 2 HBr(aq) → CaBr2(aq) + H2O(l)

8.aqueous thallium oxide + aqueous Sulfurous Acid →

aqueous Magnesium Sulfite + liquid Water

Tl2O3(aq) + 3H2SO3(aq) → Tl2(SO3)3(aq) + 3 H2O(l)

9.aqueousphosphoric Acid + aqueoussodium oxide →

aqueoussodium phosphate + liquid Water

2H3PO4(aq) + 3Na2O (aq) → 2Na3PO4+ 3H2O(l)

10.aqueousaluminum oxide + aqueous permanganic acid →

aqueousaluminum permanganate + liquid Water

Al2O3(aq) + 6HMnO4(aq) → 2Al(MnO4)3+ 3 H2O(l)

Gas Formation Reactions

A. Complete, balance, and name the products for each of the following gas formation reactions.

1. aqueous Hydrochloric acid + aqueous Sodium cyanide

HCl(aq) + NaCN(aq) NaCl(aq) + HCN(g)

2. aqueous potassium hydroxide + aqueous ammonium chloride

KOH(aq) + NH4Cl(aq)  KCl(aq) + NH4OH (decomposes)

↓

NH3(g) + H2O(l)

3. aqueous barium cyanide + aqueous phosphoric acid

3Ba(CN)2(aq) + 2H3PO4(aq)  Ba3(PO4)2 + 6HCN(g)

4. aqueous ammonium acetate + aqueous cesium hydroxide

NH4C2H3O2(aq) + CsOH(aq)  Cs C2H3O2(aq) + NH4OH (decomposes)

↓

NH3(g) + H2O(l)

5.aqueous Lithium hydroxide + aqueous ammonium phosphate

3LiOH(aq) + (NH4)3PO4(aq)  Li3PO4(aq) + 3NH4OH (decomposes)

↓

3NH3(g) + 3H2O(l)

6. aqueous Hydroiodic acid + aqueous strontium cyanide

2HI(aq) + Sr(CN)2(aq) SrI2(aq) + 2HCN(g)

Type / Reactants / Write the complete balanced equation in Symbols
It must include the reactants and products!
1. Com /
  1. Li(s) + I2(s) 
/ 2Li(s) + I2(s)  2LiI(s)
2. SR/Com /
  1. C6H6(g) + O2(g) 
/ Do not worry about this!
3 .Dec / electricity
  1. NaCl(aq) 
/ electricity
2NaCl(aq) 2Na(s) + Cl2(g)
4. SR /
  1. CaCl2(aq) + Sr(s)
/ CaCl2(aq) + Sr(s)  SrCl2(aq) + Ca(s)
5. DR /
  1. FeS(aq) + HCl(aq)
/ FeS(aq) + HCl(aq)  H2S(aq) + FeCl2(aq) NR
6. DR /
  1. NaOH(aq) + HNO3(aq) 
/ NaOH(aq) + HNO3(aq) NaNO3(aq) + H2O(l)
7. Dec / Δ
  1. CuSO4 •5H2O(s) 
/ Δ
CuSO4 •5H2O(s)  CuSO4(s) + 5H2O(l)
8. SR /
  1. F2(g) + NaBr(aq)
/ F2(g) + 2NaBr(aq) 2NaF(aq) + Br2(l)
9. DR / 9. Ga2O3(aq) + HNO3(aq)  / Ga2O3(aq) + 6HNO3(aq)  2Ga(NO3)3(aq) + 3H2O(l)
10. DR / 10. NH4Br(aq) + NaOH(aq) / NH4Br(aq) + NaOH(aq) NH4OH(aq) + NaBr(aq)
└NH3(g) + H2O(l)
11. DR / 11. Mg(CN)2(aq) + HCl(aq)  / Mg(CN)2(aq) + 2HCl(aq)  MgCl2(aq) + 2HCN(g)

You must completely rewrite the chemical equation of the right hand side including anything that’s above the reaction arrow!

Type / Reactants / 1st Write the complete balanced equation in Symbols: It must include the reactants and products
2nd Name the products.
12. Com /
  1. Solid barium oxide plus liquid water 
/ 1st. BaO(s) + H2O(l)  Ba(OH)2(aq)
2nd barium hydroxide
13. Dec / hv
  1. Aqueous potassium hydroxide 
/ hv
1st 2KOH(aq)  K2O(s) + H2O(l)
2nd potassium oxide & water
14. Dec / MnO2
  1. Solid zinc carbonate 
/ MnO2
1stZnCO3(s) ZnO(s) + CO2(g)
2nd zinc oxide & carbon dioxide
15. Com /
  1. Solid barium plus oxygen gas 
/ 1st 2Ba(s) + O2(g)  2BaO(s)
2nd barium oxide
16. Dec / heat
  1. Aqueous Hypochlorous acid 
/ heat
1st2HClO(aq)  Cl2O(g) + H2O(l)
2nd dichlorine monoxide & water
17. Dec / hv
  1. Aqueous barium chlorate 
/ hv
1st Ba(ClO3)2(aq)  BaCl2(s) + 3O2(g)
2nd barium chloride & oxygen
18. Com /
  1. Sulfur dioxide gas plus liquid water 
/ 1st SO2(g) + H2O(l)  H2SO3(aq)
2nd sulfurous acid
19. Com /
  1. Solid sulfur plus oxygen gas 
/ 1stS8(s) + 8O2(g)  8SO2(g)
S8(s) + 12O2(g)  8SO3(g)
2nd sulfur dioxide
sulfur trioxide

1 of 14