Balancing Equations Worksheets

Page 1Balancing Equations: Unit 7 (Chapter 8) Balance each equation and identify the type ofreaction: decompostion (1 reactant), combination (1 product), single replacement ( element +compound--> element + compound), double replacement (2 compounds --> 2 compounds) orcombustion (burning in oxygen) (pages 202–212)1. ________ K(s) + Br2(l) ----> KBr(s)2. ________ Al(s) + O2(g) ----> Al2O3(s)3. ________ Cl2(g) + KI(aq) ----> KCl(aq) + I2(s)4. ________ KOH(aq) + H3PO4(aq) ----> K3PO4(aq) + H2O(l)5. ________ P(s) + O2(g) ----> P2O5(g)6. ________ KClO3(s) ----> KCl(s) + O2(g)7. ________ BaCl2(aq) + Na3PO4(aq) -----> NaCl(aq) + Ba3(PO4)2(s)8. ________ C3H8 (g) + O2(g) –––> CO2(g) + H2O (g)9. ________ FeS(aq) + H3PO4(aq) -----> Fe3(PO4)2(s) + H2S (g)10. ________ AlBr3(s) ----> Al(s) + Br2(l)11. ________ C6H6 (l) + O2(g) –––> CO2(g) + H2O (g)12. ________ Na(s) + CuCl2(aq) ----> NaCl(aq) + Cu(s)13. ________ K(s) + HCl(aq) ----> KCl(aq) + H2(g)14. ________ Fe(OH)3(s) ----> Fe2O3(s) + H2O(l)15. ________ C4H10 (l) + O2(g) –––> CO2(g) + H2O (g)Write the type of reaction and the balanced formula equation for each word equation.16. ______ dissolved barium chloride + sodium sulfate ----> barium sulfate (insoluble solid) +dissolved sodium chloride17. ______ calcium metal + dissolved iron(II) nitrate ----> dissolved calcium nitrate + ironmetal18. _____ lithium metal + water ----> dissolved lithium hydroxide + hydrogen gas19. _____ dissolved iron(III) nitrate and magnesium hydroxide ---->iron(III) hydroxide (insoluble solid) + dissolved magnesium nitrate20. _____ dissolved tin(IV) fluoride + dissolved potassium sulfide --->tin(IV) sulfide (insoluble solid) + dissolved potassium fluoride

21. _____ solid sulfur + oxygen gas ----> sufur trioxide gas Page 2Predict the products (Correct formulas!!) and balance the following reactions.Combination reactions: Make the binary ionic compound from the elements. (p.212-214)Example: For K + O2 ––––> answer is 4 K + O2 ––––> 2 K2O (K + O –2 )22. Al + Br2 -----> 23. Na + O2 ---->Decomposition reactions: Decompose into elements when electricity is added. (p. 214 -216)Example: NaF –––> answer is 2 NaF –––> 2 Na + F2 (F2 is diatomic)electricityelect.24. HF --------------> 25. MgO ---––->Complete combustion of a hydrocarbon: O2 gas is a reactant, Products are CO2, H2OEx: Complete Combustion of C6H6: Answer: 2 C6H6 + 15 O2 –––> 12 CO2 + 6 H2O (220-222)26. Complete combustion of C8H1827. Complete combustion of CH3OHIncomplete combustion of a hydrocarbon: O2 gas is a reactant, Products are CO, H2OEx: Incomplete Combustion of C6H6: Ans: 2 C6H6 + 9 O2 –––> 12 CO + 6 H2O28. Incomplete combustion of C4H1029. Incomplete combustion of C3H6Single replacement : (Element + compound––> element + compound, Use the Activity Series:Reacts if the element alone is more active than [above] the element in the compound30. HCl(aq) + K(s) ----> (p. 216-218)31. Cu(s) + NaCl(aq) ---->32. Al(s) + Pb(NO3)2(aq) ---->33. AgNO3(aq) + Mg(s) ---->34. Li(s) + H2O(l) –––>(Halogens) 35. Cl2(g) + NaBr(aq) –––>36. Br2(l) + KF (aq) –––>37. MgI2(aq) + F2 (g) –––>

Chemistry Worksheet: Balancing Equations: (continued) Page 3Activty Series application1. a. Cd(NO3)2(aq) does not react with Copper metal. Is Cd more active or less active than Cu?Does Cd go above or below Cu on the activity series? How do you know?b. Cd metal reacts with SnCl2 (aq). Is Cd more active or less active than Sn? Does Cd go aboveor below Sn on the activity series? How do you know?c. Is the above information enough to place Cd on the activity series. Why or why not?d. Would Cd metal react with AgNO3(aq) ? Yes No I can't tell Why?Predict the products, Balance: Double replacement :(2 compounds–>2 compounds,Use Solubility Chart: Only Reacts IF one product is an Insoluble solid, water or a gas)2. CaI2(aq) + AgNO3(aq) -----> (p. 218-220)3. Sr(NO3)2(aq) + Al2(SO4)3(aq) ----->4. KNO3(aq) + NaCl(aq) ---->5. Na2CO3(aq) + CaCl2(aq) ---->6. H2SO4(aq) + Mg(OH)2(aq) ----->7. BaCl2(aq) + Na3PO4(aq) ----->Balancing Equations ReviewIdentify the type of each reaction (SR, DR, combo, decomp, combustion) Then, Balance them.8. ________ Fe(s) + O2(g) ----> Fe2O3(s)9. ________ SrCl2(aq) + Na3PO4(aq) -----> Sr3(PO4)2(s) + NaCl(aq)10. ________ C6H12O6(s) + O2(g) –––> CO2(g) + H2O (g)11. ________ Br2(l) + NaI(aq) ----> NaBr(aq) + I2(s)12. ________ FeCl3(aq) + Ca(OH)2(aq) ----> Fe(OH)3(s) + CaCl2(aq)13. ________ C6H14 (l) + O2(g) –––> CO2(g) + H2O(g)14. _______ Al(s) + Cu(NO3)3(aq) ----> Al(NO3)3(aq) + Cu(s)

15. _______ H2SO4(aq) + Al(OH)3(aq) ----> Al2(SO4)3(aq) + H2O(l) Page 416. DR + Decomp MgCO3(aq) + HNO3(aq) ----> Mg(NO3)2(aq) + H2O(l) + CO2(g)17. _______ Pb(NO3)2(s) ----> PbO(s) + NO2(g) + O2(g)Identify the Type of reaction and write the Balanced formula equation for each word equation.18. _______ solid Diphosphorus Pentoxide ––heat––> solid Phosphorus + Oxygen gas19. _______ dissolved Sodium Phosphate + Nickel(II) Chloride ––> dissolved Sodium Chloride+ Insoluble solid Nickel(II) Phosphate20. _______ Potassium metal + Water –––> dissolved Potassium Hydroxide + Hydrogen gas21. _______ solid Iron(III) Oxide plus Water––-> dissolved Iron(III) HydroxidePredict the Products and Balance: In addition, for the SR and DR, tell WHY it reacts ordoesn't react. (p. 222-224)TypeYes, No, Reason?electricity23. ______ KI –––––––––––>22. ______ Na(s) + Br2(l) –––>24. Complete combustion of C5H1025. Incomplete combustion of C4H9OH26. ______ Mg(s) + AgNO3(aq) ––->27. ______ Ca(OH)2(s) + HCl(aq) –––>28. ______ KBr(aq) + F2(g) –––>29. ______ Pb(s) + MgI2(aq) –––>30. ______ KNO3(aq) + MgSO4(aq) –––>31. ______ Na(s) + H2O(l) –––>32. ______ Na3PO4(aq) + MgBr2(aq) –––>33. ______ Al(s) + H2SO4(aq) –––>34. ______ I2(s) + NaCl(aq) –––>