CHEMICAL EQUATIONS I

Part I: Identify the type of reaction and write a balanced chemical equation for each of the following reactions.

1. Zinc + Sulfur ® zinc sulfide

Zn + S ® ZnS composition

2. potassium chloride + silver nitrate ® silver chloride(s) + potassium nitrate

KCl + AgNO₃ ® KNO₃ + AgCl methathesis

3. calcium oxide + water ® calcium hydroxide

CaO + H₂O ® Ca(OH)₂ composition

4. sodium hydroxide + hydrochloric acid ® sodium chloride + water

NaOH + HCl_aq ® NaCl + H₂O methathesis

5. magnesium bromide + chlorine ® magnesium chloride + bromine

MgBr₂ + Cl₂ ® MgCl₂ + Br₂ replacement

6. sodium chloride + sulfuric acid ® sodium sulfate + hydrogen chloride(g)

2NaCl + H₂SO₄ ® Na₂SO₄ + 2HCl_g methathesis

7. aluminum + iron(III) oxide ® aluminum oxide + iron

2Al + Fe₂O₃ ® Al₂O₃ + 2Fe replacement

8. ammonium nitrite ® nitrogen(g) + water

NH₄NO₂ ® N₂ +2 H₂O decomposition

9. silver nitrate + nickel ® nickel(II) nitrate + silver(s)

2AgNO₃ + Ni ® Ni(NO₃)₂ + 2Ag replacement

10. hydrogen + bromine ® hydrogen bromide(g)

H₂ + Br₂ ® 2HBr composition

Part II: Complete and balance the following chemical equations.

Composition reactions:

1. sodium + iodine ®

2Na + I₂ ® 2NaI

2. calcium + oxygen ®

2Ca + O₂ ® 2CaO

3. hydrogen + chlorine ®

H₂ + Cl₂ ® 2HCl

Decomposition reactions:

4. nickel(II) chlorate ®

Ni(ClO₃)₂ ® NiCl₂ + 3O₂

5. barium carbonate ®

BaCO₃ ® BaO + CO₂

6. zinc hydroxide ®

Zn(OH)₂ ® ZnO + H₂O

Replacement reactions:

7. aluminum + sulfuric acid ®

2Al + 3H₂SO₄ ® Al₂(SO₄)₃ + 3H₂

8. potassium iodide + chlorine ®

2KI + Cl₂ ® 2 KCl + I₂

9. iron + copper(II) nitrate ® iron(II) nitrate +

Fe + Cu(NO₃)₂ ® Fe(NO₃)₂ + Cu

Metathesis reactions:

10. silver nitrate + zinc chloride ®

2 Ag NO₃ + ZnCl₂ ® 2 AgCl +Zn (NO₃)₂

11. copper(II) hydroxide + acetic acid ®

Cu(OH)₂ + 2HCH₃CO₂ ® Cu(CH₃CO₂)₂ + 2H₂O

12. iron(II) sulfate + ammonium sulfide ®

Fe SO₄ + (NH₄)₂ S ® Fe S +(NH₄)₂ SO₄

CHEMICAL EQUATIONS II

Identify the type of reaction and write a balanced chemical equation for each of

the following reactions.

1. barium chloride + sodium sulfate ® metathesis

BaCl₂ + Na₂SO₄ ® 2NaCl + BaSO₄

2. calcium + hydrochloric acid ® replacement

Ca + 2HCl ® H₂ + Ca Cl₂

3. iron(II) sulfide + hydrochloric acid ® hydrogen sulfide(g) + metathesis

FeS + 2HCl ® H₂S + FeCl₂

4. zinc chloride + ammonium sulfide ® metathesis

ZnCl_{2 +} ( NH₄)₂ S ® ZnS + 2NH₄Cl

5. ammonia + oxygen ® nitric acid + water metathesis

NH₃ + 2O₂ ® H NO₃ + H₂O

6. magnesium + nitric acid ® replacement

Mg + 2HNO₃ ® Mg (NO₃)₂ + H₂

7. potassium + water ® replacement

2K + 2H₂O ® 2 KOH + H₂

8. sodium iodide + bromine ® replacement

2NaI + Br₂ ® 2 NaBr + I₂

9. silver + sulfur ® composition

2 Ag +S ® Ag₂S

10. sodium chlorate ® decomposition

2 NaClO₃ ® 2NaCl + 3O₂

11. carbon + steam ® carbon monoxide(g) + hydrogen(g) replacement

C + H₂O ® CO + H₂

12. zinc + lead(II) acetate ® replacement

Zn + Pb(CH₃CO₂)₂ ® Zn(CH₃CO₂)₂ + Pb

13. iron(III) hydroxide ® decomposition

2Fe (OH)₃ ® Fe₂O₃ + 3H₂O

14. iron(III) oxide + carbon monoxide ® iron + carbon dioxide(g) metathesis

Fe₂O₃ + 3CO ® 2Fe + 3CO₂

15. lead(II) acetate + hydrogen sulfide ® metathesis

Pb( CH₃ CO₂)₂ +H₂S ® 2CH₃ CO₂ H + PbS

16. aluminum bromide + chlorine ® replacement

2AlBr₃ + 3Cl₂ ® 2AlCl₃ + 3Br₂

17. magnesium carbonate ® decomposition

MgCO₃ ® MgO + CO₂

18. iron(III) chloride + sodium hydroxide ® metathesis

FeCl₃ + 3NaOH ® 3NaCl + Fe(OH)₃

19. calcium oxide + diphosphorus pentoxide ® calcium phosphate composition

3CaO + P₂O₅ ® Ca₃(PO₄)₂

20. chromium + oxygen ® composition

2Cr + 3O₂ ® 2CrO₃

21. sodium + water ® replacement

2Na + 2H₂O ® H₂ + 2NaOH

22. sodium carbonate + nitric acid ® metathesis

Na₂CO₃ + 2HNO₃ ® 2NaNO₃ + H₂CO₃

23. aluminium hydroxide + sulfuric acid ® metathesis

2Al(OH)₃ + 3H₂SO₄ ® Al₂₍SO₄)₃ + 6H₂O

24. sodium sulfite + sulfuric acid ® metathesis

Na₂SO₃ + H₂SO₄ ® Na₂SO₄ + H₂SO₃

25. calcium hydroxide + ammonium sulfate ® calcium sulfate + water + ammonia(g) metathesis

Ca(OH)₂ + (NH₄)₂SO₄ ® CaSO₄ + 2H₂O + 2 NH₃