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Chemical Reactions



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CHEMISTRY - CHAPTER 3: EQUATIONS

BALANCING EQUATIONS: FORMULAS GIVEN Practice Sheet #1


Balance the following equations:


1. Al + N2 → AlN


2. Fe + O2 → Fe3O4


3. CaCO3 → CaO + CO2


4. NH4NO3 → N2O + H2O


5. KI + Cl2 → KCl + I2


6. Pb(NO3)2 + HCl → PbCl2 + HNO3


7. BaO2 → BaO + O2


8. Al + H2SO4 → Al2(SO4)3 + H2


9. CH4 + Cl2 → CHCl3 + HCl


10. MgCl2 + NaOH → Mg(OH)2 + NaCl


11. AgNO3 + CuCl2 → AgCl + Cu(NO3)2


12. ZnS + O2 → ZnO + SO2


13. Na + H2O → H2 + NaOH


14. BaCl2 + (NH4)2CO3 → BaCO3 + NH4Cl


15. C6H6 + O2 → CO2 + H2O


16. Na + H2O → NaOH + H2


17. Fe + FeCl3 -→ FeCl2


18. Ba(OH)2 + AlCl3 → Al(OH)3 + BaCl2


19. H2C2O4 + KOH → K2C2O4 + H2O


20. C2H2Cl4 + Ca(OH)2 → C2HCl3 + CaCl2 + H2O


21. (NH4)2Cr2O7 → N2 + Cr2O3 + H2O


22. Zn3Sb2 + H2O -→ Zn(OH)2 + SbH3


23. HClO4 + P4O10 → H3PO4 + Cl2O7


24. C6H5Cl + SiCl4 + Na → (C6H5)4Si + NaCl


25. Sb2S3 + HCl → H3SbCl6 + H2S


26. IBr + NH3 → NI3 + NH4Br


27. KrF2 + H2O → Kr + O2 + HF


28. Na2CO3 + C + N2 → NaCN + CO


29. K4Fe(CN)6 + H2SO4 + H2O → K2SO4 + FeSO4 + (NH4)2SO4 + CO


BALANCING CHEMICAL EQUATIONS - NAMES GIVEN Practice Sheet #2



1. Potassium reacts with water yielding potassium hydroxide and hydrogen



2. Chlorine reacts with potassium bromide yielding potassium chloride and bromine



3. Zinc + hydrogen chloride yields zinc chloride and hydrogen



4. iron + water Fe3O4 + hydrogen




5. zinc sulfide + oxygen . zinc oxide + sulfur dioxide




6. C10H16 + Cl2 C + HCl



7. Aluminum + sodium hydroxide Na3AlO3+ hydrogen



8. C2H2 + O2 CO2 + H2O


9. Ammonia + oxygen nitrogen monoxide + water



10. Phosphorus + iron(III) oxide tetra-phosphorus decoxide + iron




11. Cupric sulfide + oxygen copper(I) oxide + sulfur dioxide



12. sodium bicarbonate + hydrogen sulfate sodium sulfate + water + carbon dioxide




13. Sodium carbonate + silver nitrate sodium nitrate + silver carbonate




14. Calcium + oxygen calcium oxide




15. Zinc + ferric oxide zinc oxide + iron




16. Magnesium bromide + chlorine magnesium chloride + bromine



17. Sodium + water sodium hydroxide + hydrogen




18. Potassium nitrate potassium nitrite + oxygen




19. Calcium oxide + hydrochloric acid calcium chloride + water



20. Magnesium + oxygen magnesium oxide



21. Iron + oxygen iron(II) oxide



22. Water + dinitrogen trioxide nitrous acid



23. Sodium oxide + water sodium hydroxide



24. Iron(III) oxide + carbon monoxide iron + carbon dioxide



25. Methane (CH4) + oxygen carbon dioxide + water





























EQUATIONS – PREDICTING BY TYPE OF REACTION


Part I: Complete the word equation and write the balanced chemical equation. Give the reason for the product(s) in each case. Consult the activity series and the solubility tables.


Composition reactions:

1. sodium + iodine

2. calcium + oxygen →

3. hydrogen + chlorine →

4. calcium oxide + water →

5. dinitrogen pentoxide + water →


Decomposition reactions:

6. nickel(II) chlorate →

7. barium carbonate →

8. zince hydroxide →

9. mercury(II) oxide →

10. copper (II) carbonate →


Replacement reactions:

11. aluminum + sulfuric acid

12. potassium iodide + chlorine→

13. iron + copper (II) nitrate →

14. zinc + hydrochloric acid →

15. magnesium + silver nitrate →


Double Replacement (ionic reactions)

16. silver nitrate + zinc chloride

17. copper(II) hydroxide + acetic acid →

18. iron(II) sulfate + ammonium sulfide →

19. ammonium chloride + sodium hydroxide →

20. hydrochloric acid + potassium hydroxide →




TYPES OF CHEMICAL EQUATIONS (IDENTIFICATION)


State whether each of the following equations represents a synthesis (s) , decomposition(d), single replacement (sr), double replacement (dr), or combustion reaction (c).


_____________ 1. CO2 C + O2


_____________ 2. NaCl + AgNO3 NaNO3 + AgCl


_____________ 3. S + Cl2 SCl2


_____________ 4. BaCl2 + 2NaOH - 2NaCl + Ba(OH)2


_____________ 5. 2C2H2 + 5O2 4CO2 + 2 H2O


_____________ 6. Zn + CuSO4 ZnSO4 + Cu


_____________ 7. CH4 C + 2H2


_____________ 8. Pb(NO3)2 + Mg Pb + Mg(NO3)2


_____________ 9. Mg + 2 HCl MgCl2 + H2


____________ 10. H2SO4 H2 + S + 2O2


_____________ 11. 2O2 + N2 N2O4


_____________ 12. 3CaBr2 + 2Na3P Ca3P2 + 6NaBr


_____________ 13. 2KI + Br2 2KBr + I2


_____________ 14. C6H12O6 6C + 6H2O


_____________ 15. 2NaF 2Na + F2


_____________ 16. Si + O2 SiO2


_____________ 17. 2NaI + Pb(NO3)22NaNO3 + PbI2


_____________ 18. H2 + CO + O2 H2CO3


_____________ 19. C3H8 + 5O2 3CO2 + 4H2O


_____________ 20. Li3PO4 3Li + P +2O2


_____________ 21. CS2 + 2F2 CF4 + 2S


_____________ 22. NaI + Cs CsI + Na








REACTION PREDICTION (Set #1)


If the word equation is complete, write and balance the chemical equation. If the word equation is incomplete, complete it and write the balanced chemical equation. Tell the type of reaction. Give reason(s) for the product(s)


1. barium chloride + sodium sulfate

2. calcium + hydrochloric acid

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

4. zinc chloride + ammonium sulfide →

5. ammonia + oxygen → nitric acid + water

6. magnesium + nitric acid →

7. potassium + water →

8. sodium iodide + bromine →

9. silver + sulfur→

10. sodium chlorate →

11. carbon + steam (H2O) → carbon monoxide(g) + hydrogen (g)

12. zinc + lead(II) acetate →

13. iron (II) hydroxide →

14. iron(II) oxide + carbon monoxide → iron + carbon dioxide (g)

15. lead (II) acetate + hydrogen sulfide →

16. aluminum bromide + chlorine →

17. magnesium carbonate →

18. iron(II) chloride + sodium hydroxide →

19. calcium oxide + diphophorus pentoxide →

20. chromium + oxygen →

21. sodium + water →

22. calcium carbonate + hydrochloric acid →

23. calcim hydroxide + phophoric acid →

24. sodium carbonate + nitirc acid →

25. aluminum hydroxide + sulfuric acid →

26. sodium sulfite + sulfuric acid →

27. copper + sulfuric acid → copper (II) sulfate + water + sulfur dioxide (g)

28. calcium hydroxide + ammonium sulfate → calcium sulfate + water + ammonia

REACTION PREDICTION (Set #2)


In each of the following examples:

a. State what type of reaction is expected.

b. Write the balanced equation for those reaction that do take place.

1. aluminum plus hydrochloric acid

2. calcium hydroxide plus nitric acid

3. magnesium plus zinc nitrate

4. mercury plus oxygen

5. zinc chloride plus hydrogen sulfide

6. dinitrogen pentoxide plus water

7. sodium chlorate heated to high temperature

8. barium nitrate plus sodium chromate

9. sodium bromide plus silver nitrate

10. zinc carbonate strongly heated

11. potassium plus fluorine

12. potassium nitrate plus zinc phosphate

13. lithium oxide plus water

14. sodium chloride molten electrolyzed

15. iron(iii) hydroxide plus phosphoric acid

16. sodium plus nitric acid

17. sulfur dioxide plus water

18. oxygen plus sulfur

19. sodium sulfate plus barium chloride

20. hydrogen plus oxygen

21. sodium oxide plus water

22. mercury(I) nitrate plus sodium carbonate

23. magnesium plus hydrochloric acid

24. lead(II) nitrate and sodium iodide

25. chromium(II) perchlorate and sodium sulfide





REACTION PREDICTION (Set #3)

Write a balanced chemical equation for each of the following reacions. Classify the reation type.


  1. iron(III) oxide + hydrogen


  1. bismuth(V) oxide


  1. Manganeese (II) chlorate + potassium phosphate


  1. Lead (II) acetate + sodium chromate


  1. potassium + iodine


  1. ammonium sulfate + barium nitrate


  1. zinc oxide


  1. gold(III) chloride + sodium sulfide


  1. magnesium + hydrochloric acid


  1. calcium hydroxide + iron (II) nitrate


  1. C4H10 + O2


  1. tin(IV) sulfide


  1. silver nitrate + zinc


  1. potassium carbonate + lead (II) nitrate


  1. ammonium chloride + mercury(II) acetate


  1. iron + hydrochloric acid


  1. sodium iodide + chlorine


  1. aluminum + oxygen


  1. barium chloride + lithium sulfate


  1. sulfuric acid + calcium hydroxide


  1. iron (II) nitrate + sodium sulfite


  1. C5H12 + O2

REACTION PREDICTION (Set #4)

Write a balanced chemical equation for each of the following reacions. Classify the reation type.


  1. zinc chloride + ammonium sulfide


  1. zinc + copper (II) sulfate


  1. magnesium bromide + chlorine


  1. aluminum oxide


  1. silver nitrate + sodium chloride


  1. magnesium + copper (II) nitrate


  1. sodium hydroxide + sulfuric acid


  1. lead (II) nitrate + potassium bromide


  1. copper + tin (IV) chloride


  1. C10H22 + O2


  1. potassium sulfide + iron (III) nitrate


  1. zinc + silver nitrate


  1. silver + oxygen


  1. tin(IV) chloride


  1. calcium hydroxide + phophoric acid


  1. magnesium iodide + chlorine


  1. barium nitrate + sodium phophate


  1. manganeese(IV) oxide


  1. nitrogen + hydrogen ammonia


  1. C11H22 + O2


  1. aluminum chloride + potassium sulfide


22. sodium sulfite + hydrochloric acid

REVIEW OF WRITING CHEMICAL EQUATIONS

For each of the following equations write a formula equation.

YOU DO NOT HAVE TO BALANCE IT.

When applicable, write a net ionic equation.


1. Solutions of sodium fluoride and dilute hydrochloric acid are mixed.

2. A saturated solution of barium hydroxide is mixed with a solution of iron(III) sulfate.

3. A solution of ammonium sulfate is added to a potassium hydroxide solution.

4. Carbon dioxide gas is bubbled through a concentrated solution of sodium hydroxide.

5. Solid copper is added to a dilute nitric acid solution.

6. Magnesium metal is burned in nitrogen gas.

7. Sulfur dioxide gas is passed over solid calcium oxide.

8. Lead foil is immersed in silver nitrate solution.

9. A solution of ammonium sulfate is added to a saturated solution of barium hydroxide.

10. Acetic acid solution is added to a solution of sodium hydrogen carbonate.

11. Hydrogen gas is passed over hot iron(III) oxide.

12. Dilute hydrochloric acid is added to a dilute solution of mercury (I) nitrate.

13. Sodium metal is added to water.

14. Dilute sulfuric acid is added to a solution of lithium hydrogen carbonate.

15. A piece of lithium metal is dropped into a container of nitrogen gas.

16. Dilute hydrochloric acid is added to a solution of potassium sulfite.

17. Solid sodium oxide is added to water.

18. A solution of sodium sulfide is added to a solution of zinc nitrate.

19. A solution of ammonia is added to a dilute solution of acetic acid.

20. Solid calcium is added to warm water.

21. Powdered magnesium oxide is added to a container of carbon dioxide gas.

22. Gaseous hydrogen sulfide is bubbled through a solution of nickel(II) nitrate.

23. A strip of magnesium is added to a solution of silver nitrate.

24. Solid potassium chlorate is heated in the presence of manganese dioxide as a catalyst.

25. Dilute hydrochloric acid is added to a solution of potassium carbonate.

26. Sulfur trioxide gas is added to excess water.

27. Dilute sulfuric acid is added to a solution of barium chloride.

28. Solutions of zinc sulfate and sodium phosphate are mixed.

29. Solutions of silver nitrate and lithium bromide are mixed.

30. Excess hydrochloric acid solution is added to a solution of potassium carbonate.

31. Ethanol (C2H5OH) is burned in excess oxygen gas.






OXIDATION /REDUCTION REACTIONS

1. Assign oxidation number to each element in the following compounds:

a. PbSO4 b. H2O2 c. K2Cr2O7 d. K2SiO3


2. Which of the following are oxidation-reduction reactions?


a. 2Na + Cl2 → 2NaCl


b. C + O2 → CO2


c. 2H2O ↔ 2H2 + O2


d. NaCl + AgNO3 → AgCl + NaNO3


e. NH3 + HCl → NH4+1 + Cl-1


f. 2KClO3 → 2KCl + O2


g. H2 + Cl2 → 2HCl


h. 2H2 + O2 → 2H2O


i. H2SO4 + 2KOH →K2SO4 + 2H2O


j. Zn + CuSO4 →ZnSO4 + Cu


3. For each oxidation-reduction in Question 2 identify the:


a. substance oxidized

b. substance reduced

c. the oxidizing agent

d. the reducing agent

e. write the oxidation and reduction half-reactions

OXIDATION REDUCTION REACTIONS – BALANCING: Set #1


Balance the following equations using the ion-electron method.


1. H2S + O2 SO2 + H2O

2. MnO2 + HCl H2O + MnCl2 + Cl2

3. zinc + hydrochloric acid zinc chloride + hydrogen

4. iron + copper(II) sulfate iron (II) sulfate + copper

5. copper + sulfuric acid copper (II) sulfate + hydrogen

6. potassium dichromate + sulfur + water sulfur dioxide + potassium hydroxide + chromium (III) oxide

7. bromine + water hydrobromic acid + hypobromous acid

8. HCl + KMnO4 H2O + KCl + MnCl2 + Cl2

9. K2Cr2O7 + HCl KCl + CrCl3 + H2O + Cl2

10. Cu2O + SO2 CuS + O2


11. CS2 + SCl2 CCl4 + S


12. NaAu(CN)2 + Zn Na2Zn(CN)4 + Au


13. FeSO4 + O2 + H2O FeOHSO4


14. HBr + Ca(BrO)2 CaBr2 + Br2 + H2O


15. Ca3(PO4)2 + SiO2 P4O10 + CaSiO3



16. The oxidation-reduction reaction between copper and concentrated nitric acid yields the following products: copper(II) nitrate, water and nitrogen dioxide. Write a balanced equation for this reaction.


17. The reaction between copper and dilute nitric acid yields the following products: copper (II) nitrate, water and nitrogen monoxide. Write the balanced equation.












Balancing REDOX Reactions: Set #2


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Balancing Equations: Formulas Given, Page 1


1) 2, 1, 2

2) 3, 2, 1

3) 1, 1, 1

4) 1, 1, 2

5) 2, 1, 2, 1

6) 1, 2, 1, 2

7) 2, 2, 1

8) 2, 3, 1, 3

9) 1, 3, 1, 3

10) 1, 2, 1, 2

11) 2, 1 ,2 , 1

12) 2, 3 ,2, 2

13) 2, 2, 1, 2

14) 1, 1, 1, 2

15) 2, 15, 12, 6

16) 2, 2, 2, 1

17) 1, 2, 3

18) 3, 2, 2, 3

19) 1, 2, 1, 2

20.) 2, 1, 2, 1, 2

21) 1, 1, 1, 4

22) 1, 6, 3, 2

23) 12, 1, 4, 6

24) 4, 1, 8, 1, 8

25) 1, 12, 2, 3

26) 3, 4, 1, 3

27) 2, 2, 2, 1, 4

28) 1, 4, 1, 2, 3

29) 1, 6, 6, 2, 1, 3, 6


Balancing Equations – Names Given (pages 2/3)


1. 2K + 2H2O 2KOH + H2

2. Cl2 + 2KBr 2KCl + Br2

3. Zn + 2HCl ZnCl2 + H2

4. 3Fe + 4H2O Fe3O4 + 4H2

5. 2ZnS + 3O2 2ZnO + 2SO2

6. C10 H16 + 8Cl2 10C + 16 HCl

7. 2Al + 6NaOH 2Na3AlO3 + 3H2

8. 2C2H2 + 5O2 4CO2 + 2H2O

9. 4NH3 + 5O2 4NO + 6H2O

10. 12P + 10Fe2O3 3P4O10 + 20 Fe

11. 4CuS + 5O2 2Cu2O + 4SO2

12. 2NaHCO3 + H2SO4 Na2SO4 + 2H2O + 2CO2

13. Na2CO3 + 2AgNO3 2NaNO3 + Ag2CO3

14. 2Ca + O2 2CaO

15. 3Zn + Fe2O3 3ZnO + 2Fe

16. HgBr2 + Cl2 MgCl2 + Br2

17. 2Na + 2H2O 2NaOH + H2

18. 2KNO3 2KNO2 + O2

19. CaO + 2HCl CaCl2 + H2O

20. 2 MgO + O2 2MgO

21. 2Fe + O2 2FeO

22. H2O + N2O3 2HNO2

23. Na2O + H2O 2NaOH

24. Fe2O3 + 3CO 2Fe + 3CO2

25. CH4 + 2O2 CO2 + 2H2O


EQUATIONS – Predicting by type of reaction, page 4


1. 2Na + I2 → 2NaI

2. 2Ca + O2 → 2CaO

3. H2 + Cl2 → 2HCl

4. CaO + H2O → Ca(OH)2

5. N2O5 + H2O → 2HNO3


6. Ni(ClO3)2 → NiCl2 + 3O2

7. BaCO3 → BaO + CO2

8. Zn(OH)2 → ZnO + H2O

9. 2HgO → 2Hg + O2

10. CuCO3 → CaO + CO2


11. 2Al + 3 H2SO4 → Al2(SO4)3 + 3H2O

12. 2KI + Cl2→ 2KCl + I2

13. 2 Fe + 3Cu(NO3)2 →2 Fe(NO3)3 + 3Cu

14. Zn + 2HCl → ZnCl2 + H2

15. Mg + 2AgNO3 → Mg(NO3)2 + 2Ag


16. 2AgNO3 + ZnCl2 → Zn(NO3)2 + 2AgCl(s)

17. Cu(OH)2 + 2 CH3COOH → Cu(CH3COO) 2 + 2H2O

18. FeSO4 + (NH4)2S → FeS + (NH4)2SO4

19. NH4Cl + NaOH → NH3 + H2O + NaCl

20. HCl + KOH → KCl + H2O



Types of Chemical Equations (Page # 5)


1. d 2. dr 3. s 4. dr 5. c 6. sr 7. d

8. sr 10. d 11. s 12. s 13. dr 14. d 15. d

16. s 17. dr 18. s 19. c 20. d 21. sr 22. sr


Reaction Prediction (Set #1) Page 6


1. BaCl2 + Na2SO4 → BaSO4 (s) + 2NaCl

2. Ca + 2HCl → CaCl2 + H2

3. FeS + 2HCl → H2S + FeCl2

4. ZnCl2 + (NH4)2S → ZnS(s) + 2NH4Cl

5. NH3 + 2O2 → HNO3 + H2O

6. Mg + 2HNO3 → Mg(NO3)2 + H2

7. 2K + 2H2O → 2KOH + H2

8. 2NaI + Br2 → 2NaBr + I2

9. 2Ag + S → Ag2S

10. 2NaClO3 → 2NaCl + 3O2

11. C + H2O → CO + H2

12. Zn + Pb(C2H3O2)2 → H2 + Zn (C2H2O3)2

13. Fe(OH)2 → FeO + H2O

14. FeO + CO → Fe + CO2

15. Pb(C2H3O2)2 + H2S → PbS + 2HC2H3O2

16. 2AlBr3 + 3Cl2 → 2AlCl3 + 3 Br2

17. MgCO3 → MgO + CO2

18. FeCl2 + 2NaOH → Fe(OH)2(s) + NaCl

19. 6CaO + 2P2O5 → 2Ca3(PO4)2

20. 4Cr + 3O2 → 2Cr2O3

21. 2Na + 2H2O → 2NaOH + H2

22. CaCO3 + 2HCl → CaCl2 + CO2 + H2O

23. 3Ca(OH)2 + 2 H3PO4 → Ca3(PO4)2(s) + 6H2O

24. Na2CO3 + 2HNO3 → 2NaNO3 + H2O + CO2

25. 2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O

26. Na2SO3 + H2SO4 → Na2SO4 + SO2 + H2O

27. Cu + H2SO4 → CuSO4 + H2

28. Ca(OH)2 + (NH4)2SO4 → CaSO4 + 2NH3 + 2H2O




Reaction Prediction (Set #2): (Page 7).


In each of the following examples:

a. State what type of reaction is expected.

c. Write the balanced equation for those reaction that do take place.

1. aluminum plus hydrochloric acid 2Al + 6HCl → 2AlCl3 + 3H2

2. calcium hydroxide plus nitric acid Ca(OH)2 + 2HNO3 → Ca(NO3)2 + 2H2O(l)

3. magnesium plus zinc nitrate Mg + Zn(NO3)2 → Mg(NO3)2 + Zn

4. mercury plus oxygen 2Hg + O2 → 2HgO

5. zinc chloride plus hydrogen sulfide ZnCl2 + H2S → ZnS(s) + 2HCl

6. dinitrogen pentoxide plus water N2O5 + H2O → 2HNO3

7. sodium chlorate heated to high temperature 2NaClO3 →2NaCl + 3O2

8. barium nitrate plus sodium chromate Ba(NO3)2 + Na2CrO4 → BaCrO4(s) + 2NaNO3

9. sodium bromide plus silver nitrate NaBr + AgNO3 → NaNO3 + AgBr(s)

10. calcium phosphate plus aluminum sulfate Ca3(PO4)2 + Al2(SO4)3 → 3CaSO4(s) + 2AlPO4(s)

11. zinc carbonate strongly heated ZnCO3 → ZnO + CO2

12. potassium plus fluorine 2K + F2 2KF

13. lithium oxide plus water Li2O + H2O → 2LiOH

14. sodium chloride molten electrolyzed 2NaCl ---electrolysis → 2Na + Cl2

15. iron(iii) hydroxide plus phosphoric acid Fe(OH)3 + H3PO4 → FePO4 + 3H2O(l)

16. sodium plus nitric acid 2Na + 2HNO3 → 2 NaNO3 + H2

17. sulfur dioxide plus water SO2 + H2O →H2SO3

18. oxygen plus sulfur O2 + S → SO2

19. sodium sulfate plus barium chloride Na2SO4 + BaCl2 → BaSO4(s) + 2NaCl

20. hydrogen plus oxygen 2H2 + O2 2H2O

21. sodium plus water 2Na + 2H2O → 2 NaOH + H2

22. mercury(I) nitrate plus sodium carbonate Hg2(NO3)2 + Na2CO3 →Hg2CO3(s) + NaNO3

23. magnesium plus hydrochloric acid Mg + 2 HCl → MgCl2 + H2

24. lead(II) nitrate and sodium iodide Pb(NO3)2 + 2NaI → PbI2(s) + 2NaNO3

25. chromium(III) perchlorate and sodium sulfide 2Cr(ClO4)3 + 3Na2S → 2Cr2S3(s) + 6NaClO4


Reaction Prediction (Set #3): (Page 8).

  1. Fe2O3 +3H2 3H2O + 5Fe

  2. Bi2O5 4Bi + 5O2

  3. 3Mn(ClO3)2 + 2K3PO4 6KClO3 + Mn3(PO4)2 (s)

  4. Pb(CH3COO)2 + Na2CrO4 PbCrO4(s) + 2NaCH3COO

  5. 2K + I2 2KI

  6. (NH4)2SO4 + Ba(NO3)2 BaSO4(s) + 2NH4NO3

  7. 2ZnO 2Zn + O2

  8. 2AuCl3 + 3Na2S 6NaCl + Au2S3(s)

  9. Mg + 2HCl MgCl2 + H2

  10. Ca(OH)2 + Fe(NO3)2 Fe(OH)2 (s) + Ca(NO3)2

  11. 2C4H10 + 13 O2 8CO2 + 10 H2O

  12. SnS2 Sn + 2S

  13. 2AgNO3 + Zn Zn(NO3)2 + 2Ag

  14. K2CO3 + Pb(NO3)2 2KNO3 + PbCO3(s)

  15. 2NH4Cl + Hg(C3H3O2)2 2NH4C2H3O2 + HgCl2(s)

  16. Fe + 2HCl FeCl2 + H2 or 2Fe + 6HCl 2FeCl3 + 3H2

  17. 2NaI + Cl2 2NaCl + I2

  18. 4Al + 3O2 2Al2O3

  19. BaCl2 + Li2SO4 BaSO4(s) + 2 LiCl

  20. H2SO4 + Ca(OH)2 CaSO4 + 2H2O

  21. Fe(NO3)2 + Na2S FeS + 2NaNO3

  22. C5H11 + 8O2 5CO2 + 6H2O


Reaction Prediction (Set #4): (Page 9).

1. ZnCl2 + (NH4)2S → 2NH4Cl + ZnS(s)

2. Zn + CuSO4 → ZnSO4 + Cu

3. MgBr2 + Cl2 → MgCl2 + Br2

4. 2Al2O3 → 2Al + 3O=

5. AgNO3 + NaCl → AgCl(s) + NaNO=

6. Mg + Cu(NO3)2 → Mg(NO3)2 + Cu

7. 2NaOH + H2SO4 → Na2SO4 + 2H2O

8. Pb(NO3)2 + 2KBr → PbBr2(s) + 2KNO3

9. 2Cu + SnCl4 → 2CaCl2 + Sn

10. 2C10H22 + 31O2 → 20CO2 + 22H2O

11. 3K2S + 2Fe(NO3)3 → 6KNO3 + Fe2S3(s)

12. Zn + 2AgNO3 → Zn(NO3)2 + 2Ag

13. 4Ag + O2 → 2Ag2O

14. SnCl4 → Sn + 2Cl2

15. 3Ca(OH)2 + 2H3PO4 → Ca3(PO4)2(s) + 6H2O

16. MgI2 + Cl2 → MgCl2 + I2

17. 3Ba(NO3)2 + 2Na3PO4 → Ba3(PO4)2(s) + 6NaNO3

18. MnO2 → Mn + O2

19. N2 + 3H2 → 2NH3

20. 2C11H22 + 33O2 → 22CO2 + 22H2O

21. 2AlCl3 + 3K2S → 6KCl + Al2S3

22. Na2SO3 + 2HCl → 2NaCl + SO2(g) + H2O




REVIEW OF WRITING CHEMICAL EQUATIONS: PAGE 10

Formula Equation Ionic Equation


1. NaF(aq) + HCl(aq) → NaCl + HF(g) H+ + F- → HF(g)

2. Ba(OH)2 + Fe2(SO4)3 → BaSO4 + Fe(OH)3

Ba+2 + OH- + Fe+3 + SO4-2 →BaSO4(s) + Fe(OH)3(s)

3. (NH4)2SO4 + KOH→ K2SO4 + NH3(g) + H2O NH4+ + OH- → NH3 + H2O

4. CO2(g) + NaOH(aq) → Na2CO3 + H2O CO2 + H2O → H2CO3

H2CO3 + NaOH → Na2CO3 + H2O H+ + OH- → H2O

5. Cu + HNO3 → H2 + Cu(NO3)2 NO REACTION

6. Mg + N2 → Mg3N2

7. SO2(g) + CaO → CaSO3

8. Pb(s) + AgNO3 (aq) → Ag + Pb(NO3)2 Pb(s) + Ag+ → Pb+2 + Ag(s)

9. (NH4)2SO4 + Ba(OH) 2 → BaSO4(s) + NH4OH Ba+2 + SO4-2 → BaSO4(s)

10. HC2H3O2 + NaHCO3 → NaC2H3O2 + H2O + CO2 H+ +HCO3-→ H2O + CO2

11. H2 + Fe2O3 → Fe + H2O H2 + Fe+3→ H+ + Fe

12. HCl + Hg2(NO3)2 → HNO3 + Hg2Cl2(s) Hg2+2 + Cl- → Hg2Cl2(s)

13. Na + H2O → NaOH + H2 Na + H+ → H2 + Na+

14. H2 SO4 + LiHCO3 → Li2SO4 + H2O + CO2 H+ +HCO3-→ H2O + CO2

15. Li + N2 → Li3N

16. HCl + K2SO3 → KCl + H2O + SO2 H+ + SO3-2 → H2O + SO2

17. Na2O + H2O → NaOH

18. Na2S + Zn(NO3)2 → ZnS(s) + NaNO3 Zn+2 + S-2 → ZnS(s)

19. NH4OH + HC2H3O2 → NH4C2H3O2 + H2O H+ + OH- → H2O

20. Ca + H2O → Ca(OH)2

21. MgO + CO2 → MgCO3

22. H2S(g) + Ni(NO3)2 → NiS(s) + HNO3 Ni+2 + S-2 → NiS(S)

23. Mg + AgNO3 → Ag + Mg(NO3)2 Mg + Ag+1 → Mg+2 + Ag

24. KClO3 → KCl + O2

25. HCl + K2CO3 → KCl + H2O + CO2 H+ CO3-2 → H2O + CO2

26. SO3(g) + H2O → H2SO3

27. H2SO4 + BaCl2 → BaSO4 + HCl Ba+2 + SO4-2 → BaSO4(s)

28. ZnSO4 + Na3PO4 → Zn3(PO4)2(s) + Na2SO4 Zn +2 + PO4-3 → Zn3(PO4)2(s)

29. AgNO3 + LiBr → LiNO3 + AgBr Ag+ + Br- → AgBr

30. HCl + K2CO3 → KCl + H2O + CO2 H+ CO3-2 → H2O + CO2

31. C2H5OH + O2 → CO2 + H2O


Oxidation/Reduction Reactions: page 11


1. (a) +2, +6, -2 2. +1, -1 3. +1, +6, -2

2. (a), (b), (c), (f), (g) (h), (j) are oxidation/reduction reactions

3.

Question #

Substance oxidized

Substance reduced

Oxidizing agent

Reducing agent

Equation

(a)

Na0

Cl2

Cl2

Na

Na0 → Na+1 + 1e; Cl2 + 2e → 2Cl-

(b)

C0

O2

O2

C0

C0 → C+4 + 4e; O2 +4e → 2c

(c)

O-2

H+1

H+1

O-2

2O-2→ 3O2 +4e; 4e + 4 H+1 → H20

(f)

O-2

Cl+5

Cl+5

O-2

6 O-2→ 3O2 +12e; 2Cl+5 + 12 e → 2Cl-1

(g)

H20

Cl20

Cl20

H20

H20 → 2H+1 + 2e; Cl20 + 2e → 2Cl-1

(h)

H20

O2

O2

H20

O2 +4e O-2→ 2O-2 ; 2 H20 → 4H+1 + 4e

(j)

Zn0

Cu+2

Cu+2

Zn0

Zn0→ Zn+2 + 2e; Cu+2 + 2e → Cu0

Oxidation/Reduction Reactions - Balancing: page 12


  1. 2, 2, 2

  2. 1, 4, 2, 1, 1

  3. 1, 2, 1, 2

  4. 1, 1, 1, 1

  5. 1, 2, 1, 1

  6. 1, 2, 1, 2, 2, 2

  7. 1, 1, 1, 1

  8. 16, 2, 8, 2, 2, 5

  9. 1, 14, 2, 2, 7,3

  10. 2, 4, 4, 1

  11. 1, 2, 1, 4

  12. 2, 1, 1, 2

  13. 4, 1, 2, 4

  14. 4, 1, 1, 2, 2

  15. 2, 6, 1, 6

  16. 1, 4, 1, 2, 2

  17. 3, 8, 3 ,4, 2


Answers to Odd Numbered Exercises: page 13


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Краткое описание документа:

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.[1] Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes may occur.

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