Types of Reactions and Balancing Equations
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Unit 4 (Ch. 8 Review Worksheet) Name______(Types of Reactions and Balancing Equations)
Use your notes to complete the following questions. Identify the general equation for the five types of chemical reactions
1. Direct Combination (Synthesis)
2. Decomposition (Analysis)
3. Single Replacement
4. Double Replacement
5. Combustion
Balance each reaction by writing the correct coefficients in the space provided. Classify each reaction as Direct Combination (DC), Decomposition (D), Single Replacement (SR), Double Replacement (DR), or Combustion (C) by circling the correct letters.
6. _____Na + _____HOH ______NaOH + ______H2
Classification (circle one): DC D SR DR C
7. ___Fe + _____O2 ____Fe2O3
Classification (circle one): DC D SR DR C
8. ___Zn + ______CuSO4 ______Cu + ____ZnSO4
Classification (circle one): DC D SR DR C
9. ____Zn(C2H3O2)2 + ____Na3PO4 ____NaC2H3O2 + ______Zn3(PO4)2 Classification (circle one): DC D SR DR C
10. _____H2O _____H2 + ______O2
Classification (circle one): DC D SR DR C
11. _____Al2(SO4)3 + _____CaCl2 ____AlCl3 + _____CaSO4
Classification (circle one): DC D SR DR C
12. _____C4H10 + ______O2 ______CO2 + ______H2O
Classification (circle one): DC D SR DR C
Predict the molecule that would go in the space(s) for each chemical equation, then balance and classify the reaction. If you have a single-replacement or double-replacement reaction use the activity series or solubility table to predict if any of the reactions will NOT occur. If so, write “NR” next to the reaction.
13. KBrO3 (s) KBr(s) + ______
14. Mg(s) + ______ MgO(s)
15. Zn(s) + CuSO4 (aq) ______+ ______
16. Zn(C2H3O2)2(aq) + Na3PO4(aq) ______+ ______
17. Fe(s) + Na2CO3 (aq) ______+ ______
18. NH3(g) ______+ ______19. C3H8(g) + O2(g) CO2 (g) + ______
20. Na2SO4(aq) + KCl(aq) ______+ ______Use the following chemical reaction to answer the rest of the questions: Solutions of lead (II) nitrate and calcium iodide are reacted to form a cloudy yellow precipitate called lead (II) iodide and aqueous calcium nitrate.
Word Equation: Write the word equation for the above reaction.
Molecular Equation: Write the formulas for each substance along with their phase notation: For phase use (s) = solid, (l) = liquid, (g) = gas, and (aq) = aqueous. Balance the equation if necessary.
Complete Ionic Equation: Aqueous molecules that dissociate are shown as aqueous ions.
Spectator Ion: Any ion that is not affected in the reaction.
Identify the spectator ions by circling them in the above ionic equation.
Net Ionic Equation: This is your ultimate goal. Only show the reacting species (the ions that are reacting).
Classify the type of reaction: (Combination, decomposition, combustion, single or double replacement) circle one
Vocabulary Words Review these terms using the textbook or notes. Chemical equation Direct combination reaction Product Skeleton/Word equation Decomposition reaction Coefficient Balanced molecular equation Single replacement reaction Activity series Complete ionic equation Double replacement reaction Catalyst Spectator ion Combustion reaction Net ionic equation Reactant Symbols for equations including: Pt heat MnO2 Reversible Reactions Heat Supplied to the Reaction Use of a Catalyst