Reaction Worksheet Answer Key

Go to the Reaction Worksheet.

Write balanced equations for the following word equations.

1. potassium chloride + silver nitrate --> potassium nitrate + silver chloride

KCl + AgNO₃ --> KNO₃ + AgCl

2. aluminum hydroxide + sodium nitrate --> aluminum nitrate + sodium hydroxide

Al(OH)₃ + 3 NaNO₃ --> Al(NO₃)₃ + 3 NaOH

3. iron metal + copper(II) sulfate -->iron(II) sulfate + copper metal

Fe + CuSO₄ --> FeSO₄ + Cu

4. aluminum metal + copper(II) chloride --> aluminum chloride + copper metal

2 Al + 3 CuCl₂ --> 2 AlCl₃ + 3 Cu

5. potassium bromide --> potassium metal + bromine

2 KBr --> 2 K + Br₂

6. calcium carbonate --> calcium oxide + carbon dioxide gas

CaCO₃ --> CaO + CO₂

7. zinc metal + oxygen gas --> zinc oxide

2 Zn + O₂ --> 2 ZnO

8. chlorine gas + sodium metal --> sodium chloride

Cl₂ + 2 Na --> 2 NaCl

9. aluminum sulfate + barium chloride --> aluminum chloride + barium sulfate

Al₂(SO₄)₃ + 3 BaCl₂ --> 2 AlCl₃ + 3 BaSO₄

10. beryllium fluoride + magnesium --> magnesium fluoride + beryllium

BeF₂ + Mg --> MgF₂ + Be

11. sodium hydrogen carbonate --> sodium carbonate + carbon dioxide + water

2 NaHCO₃ --> Na₂CO₃ + CO₂ + H₂O


Complete the word equation for the following chemical equations. Then below the word equation, write the balanced chemical equation. Indicate the type of reaction on the line to the left of the equation by classifying each reaction as single replacement (SR), double replacement (DR), decomposition (D), synthesis (S) (or combination), or combustion (C).

_DR_ 12. aluminum sulfate + calcium phosphate --> aluminum phosphate + calcium sulfate,

Al₂(SO₄)₃ + Ca₃(PO₄)₂ --> 2 AlPO₄ + 3 CaSO₄

_DR_ 13. magnesium chloride + silver nitrate --> magnesium nitrate + silver chloride,

MgCl₂ + 2 AgNO₃ --> Mg(NO₃)₂ + 2 AgCl

_D__ 14. sodium chlorate --> sodium chloride + oxygen,

2 NaClO₃ --> 2 NaCl + 3 O₂

_S__ 15. hydrogen gas + oxygen gas --> water,

2 H₂ + O₂ --> 2 H₂O

_SR_ 16. zinc metal + copper(II) nitrate --> zinc nitrate + copper

Zn + Cu(NO₃)₂ --> Cu + Zn(NO₃)₂

_D__ 17. sulfurous acid, H₂SO₃ --> water + sulfur dioxide

H₂SO₃ --> H₂ + SO₂

_DR_ 18. copper(II) oxide + sulfuric acid. copper (II) sulfate + water

CuO + H₂SO₄ --> CuSO₄ + H₂O

_S__ 19. nitrogen gas + hydrogen gas --> ammonia (NH₃)

2 N₂ + 3 H₂ --> 2 NH₃

_SR_ 20. sodium iodide + chlorine gas --> sodium chloride + iodine

2 NaI + Cl₂ --> 2 NaCl + I₂

_D__ 21. copper(II) hydroxide --> copper(II) oxide + water

Cu(OH)₂ --> CuO + H₂O

_S__ 22. ammonia gas (NH₃) + hydrochloric acid (HCl) --> ammonium chloride

NH₃ + HCl --> NH₄Cl

_SR_ 23. potassium metal + water (hint: H⁺OH^-) --> potassium hydroxide and hydrogen

K + H⁺OH^- --> 2 KOH + H₂

_C__ 24. propane (C₃H₈) + oxygen --> carbon dioxide and water

C₃H₈ + 5 O₂ --> 3 CO₂ + 4 H₂O


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