Balancing and Predicting Reactions

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Science 10

Balancing & Predicting Reactions

I. Formation Reactions

A. Balance these reactions.

1. K (s) + O2 (g)  K2O (s)

2. P4(s) + Cl2 (g)  PCl5(s)

3. Cu (s) + S8 (s)  CuS (s)

4. Mg (s) + O2 (g)  MgO (s)

5. Fe (s) + O2 (g)  Fe2O3(s)

6. P4(s) + S8 (g)  P2S5(s)

7. C (s) + O2 (g)  CO (g)

8. N2(g) + O2 (g)  NO2(g)

9. Li (s) + N2 (g)  Li3N (s)

10. S8(s) + O2 (g)  SO2(g)

B. Complete these reactions and balance them.

11. Al (s) + Br2 (g)

12. H2(g) + O2 (g) make water vapor please!

13. Al (s) + O2 (g)

14. Ca (s) + Cl2 (g)

15. Zn (s) + S8 (s)

C. Translate, complete and balance these.

16.Solid aluminum metal reacts with oxygen gas to form solid aluminum oxide.

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II. Decomposition Reactions

1. NaCl (s)  Na (s) + Cl2 (g)

2. CaBr2(s)  Ca (s) + Br2 (l)

3. CCl4(l)  C (s) + Cl2 (g)

4. NCl3(g)  N2(g) + Cl2 (g)

5. P4O10(s)  P4(s) + O2 (g)

6. Ag2O (s)  Ag (s) + O2 (g)

7. HCl (aq)  H2(g) + Cl2 (g)

8. KI (s)  K (s) + I2 (s)

9. AlCl3(s)  Al (s) + Cl2 (g)

10. CuO (s)  Cu (s) + O2 (g)

11. NF3(g)

12. NiO (s)

13. LiCl (s)

14. H2S (g)

15. HgO (s)

16.rubidium oxide decomposes into its component elements

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III. Single Replacement Reactions

1. K (s) + H3PO4 (aq)  K3PO4(aq) + H 2 (g)

2. Fe (s) + H2S (aq)  Fe2S3(s) + H 2 (g)

3. Cl2(g) + MgBr2 (aq)  MgCl2(aq) + Br2 (aq)

4. Cu (s) + Ag2CO3 (s)  CuCO3(s) + Ag (s)

5. Br2(g) + KI (aq)  I2(aq) + KBr (aq)

6. Mg (s) + Zn3(PO4)2 (s)  Mg3(PO4)2 (s) + Zn (s)

7. K (s) + Al(NO3)3 (aq)  Al (s) + KNO3 (aq)

8. Ca (s) + HOH (l)  Ca(OH)2 (s) + H2 (g)

9. Na (s) + H2SO4 (s)  Na2SO4 (aq) + H2 (g)

10. K (s) + HOH (l)  KOH (aq) + H2 (g)

11. Cu (s) + Ag2CO3 (s)

12. Al (s) + Pb(NO3)2 (aq)

13. Zn (s) + Cu(NO3)2 (aq)

14. Cl2 (s) + NaI (aq)

15. Cu (s) + HNO3 (aq)

16.silver reacts with gold (III) nitrate

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IV Double Replacement Reactions

1. Na2SO4(aq) + BaCl2 (aq)  BaSO4 (s) + NaCl (aq)

2. HNO3 (aq) + Ba(OH)2 (aq) HOH (l) + Ba(NO3)2 (aq)

3. Na2CO3 (aq) + Fe(NO3)3(aq) Fe2(CO3)3 (s) + NaNO3(aq)

4. CaCl2 (aq) + K3PO4(aq) Ca3(PO4)2 (s) + KCl (aq)

5. Al2(SO4)3 (aq) + Ba(OH)2(aq) Al(OH)3 (s) + BaSO4 (s)

6. NaOH (aq) + H2SO4(aq) HOH (l) + Na2SO4 (aq)

7. Na3PO4 (aq) + Ag2SO4(s) Na2SO4 (aq) + Ag3PO4 (s)

8. Na2CrO4 (aq) + Cu(NO3)2(aq) NaNO3(aq) + CuCrO4 (aq)

9. H3PO4 (aq) + KOH (aq) HOH (l) + K3PO4 (aq)

10. Na2CO3 (aq) + HNO3(aq) H2CO3 (aq) + NaNO3 (aq)

11. CuCl2 (aq) + K2S (aq)

12. H2SO4 (aq) + Sr(OH)2(aq)

13. ZnSO4 (aq) + (NH4)3PO4 (aq)

14. H2SO4 (aq) + NaCH3COO (aq)

15. Co(NO3)2 (aq) + KOH (aq)

16.solutions of sodium hydroxide and hydrochloric acid react

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V. Combustion Reactions

1. C2H6 (g) + O2(g) CO2 (g) + H2O (g)

2. C3H8 (g) + O2(g) CO2 (g) + H2O (g)

3. C6H14 (g) + O2(g) CO2 (g) + H2O (g)

4. C8H18 (g) + O2(g) CO2 (g) + H2O (g)

5. C2H2 (g) + O2(g) CO2 (g) + H2O (g)

6. C2H4 (g) + O2(g) CO2 (g) + H2O (g)

7. ZnS (s) + O2(g) ZnO (s) + SO2 (g)

8. CH3NO2 (l) + O2(g) CO2 (g) + H2O (g) + NO2 (g)

9. NH3 (g) + O2(g) NO2 (g) + H2O (g)

10. C2H5SH (g) + O2(g) CO2 (g) + H2O (g) + SO2 (g)

11. C5H12 (l) + O2(g)

12. C11H24 (l ) + O2(g)

13. C3H6 (g) + O2(g)

14. C25H52 (s) + O2(g)

15. NiS (s) + O2(g)

16.Table sugar or sucrose (C12H22O11) is burned to produce carbon dioxide and water

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VI. All Kinds of Reactions

A. Balance these reactions. Classify these reactions!

1. Li (s) + AlCl3 (aq) Al (s) + LiCl (aq)

2. NH3 (g) N2 (g) + H2 (g)

3. K (s) + Br2 (l)  KBr (s)

4. C10H22 (l) + O2(g)  CO2 (g) + H2O (g)

5. NH4OH (aq) + H2CO3 (aq)  HOH (l) + (NH4)2CO3(aq)

6. HOH (l) H2 (g) + O2 (g)

7. Al (s) + Cl2(g) AlCl3(s)

8. Zn (s) + SnF4 (aq)  Sn + ZnF2 (aq)

9. Ba(NO3)2 (aq) + K3PO4(aq) 

10. C7H16 (l) + O2(g) 

11. NaCl (aq)

12. Mg (s) + HCl (aq) 

13. S8 (s) + O2(g) 

14. FeCl3 (s) + KOH (aq) 

15. CH4 (g) + O2(g) 

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Answers

I Formation Reactions

Balancing Number Used

1. 4 1 2

2. 1 10 4

3. 8 1 8

4. 2 1 2

5. 4 3 2

6. 4 5 8

7. 2 1 2

8. 1 2 2

9. 6 1 2

10. 1 8 8

II Simple Decomposition Reactions

1. 2 2 1

2. 1 1 1

3. 1 1 2

4. 2 1 3

5. 1 1 5

6. 2 4 1

7. 2 1 1

8. 2 2 1

9. 2 2 3

10. 2 2 1

III Single Replacement Reactions

1. 6 2 2 3

2. 2 3 1 3

3. 1 1 1 1

4. 1 1 1 2

5. 1 2 1 2

6. 3 1 1 3

7. 3 1 1 3

8. 1 2 1 1

9. 2 1 1 1

10. 2 2 2 1

11. 2 Al (s) + 3 Br2(l)  2 AlBr3 (s)

12. 2 H2(g) + O2(g)  2 H2O (g)

13. 4 Al (s) + 3 O2(g)  2 Al2O3 (s)

14. Ca (s) + Cl2(g)  CaCl2 (s)

15. 8 Zn (s) + S8(s)  8 ZnS (s)

16. 4 Al(s) + 3O2(g) 2Al2O3(s)

17. 8 Zn(s) + S8(s)  8ZnS(s)

11. 2 NF3 (g) N2(g) + 3 F2 (g)

12. 2 NiO (s) 2 Ni (s) + O2 (g)

13. 2 LiCl (s) 2 Li (s) + Cl2 (g)

14. 8 H2S (g) 8 H2(g) + S8 (s)

15. 2 HgO (s) 2 Hg (l) + O2 (g)

16. 2 Rb2O (s) 4 Rb (s) + O2 (g)

17. CaCl2(s) Ca (s) + Cl2 (g)

11. Cu (s) + Ag2CO3 (s) CuCO3(s) + 2 Ag (s)

12. 2 Al (s) + 3 Pb(NO3)2 (aq) 2 Al(NO3)3(aq) + 3 Pb (s)

13. Zn (s) + Cu(NO3)2 (aq)  Zn(NO3)2 (aq) + Cu (s)

14. Cl2(g) + 2 NaI (aq)  2 NaCl (aq) + I2 (aq)

15. Cu (s) + 2 HNO3 (aq)  Cu(NO3)2 (aq) + H2 (g)

16. 3 Ag (s) + Au(NO3)3 (aq)  3 AgNO3 (aq) + Au (s)

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IV Double Replacement Reactions

1. 1 1 1 2

2. 2 1 2 1

3. 3 2 1 6

4. 3 2 1 6

5. 1 3 2 3

6. 2 1 2 1

7. 2 3 3 2

8. 1 1 2 1

9. 1 3 3 1

10. 1 2 1 2

V Combustion Reactions

Balancing Numbers Used

1. 2 7 4 6

2. 1 5 3 4

3. 2 19 12 14

4. 2 25 16 18

5. 2 5 4 2

6. 1 3 2 2

7. 2 3 2 2

8. 4 7 4 6 4

9. 4 7 4 6

10. 2 9 4 6 2

VI All Kinds of Reactions

Balancing Numbers Used

1. 3 1 1 3 sr

2. 2 1 3 sd

3. 2 1 2 f

4. 2 31 20 22 c

5. 2 1 2 1 dr

6. 2 2 1 sd

7. 2 3 2 f

8. 2 1 1 2 sr

11.CuCl2 (aq) + K2S (aq)  CuS (s) + 2 KCl (aq)

12.H2SO4 (aq) + Sr(OH)2 (aq) 2 HOH (l) + SrSO4(s)

13.3 ZnSO4(aq) + 2(NH4)3PO4 (aq)  Zn3(PO4)2 (s) + 3(NH4)2SO4 (aq)

14.H2SO4 (aq) + 2 NaCH3COO (aq)Na2SO4 (aq) + 2 CH3COOH (aq)

15.Co(NO3)2 (aq) + 2 KOH (aq) Co(OH)2 (aq) + 2 KNO3 (aq)

16.NaOH (aq) + HCl (aq) NaCl (aq) + HOH (l)

17.AgNO3 (aq) + NaCl (aq) AgCl (s) + NaNO3 (aq)

11. C5H12 (l) + 8 O2 (g)  5 CO2(g) + 6 H2O (g)

12. C11H24 (l) + 17 O2 (g)  11 CO2(g) + 12 H2O (g)

13. 2 C3H6 (g) + 9 O2 (g)  6 CO2(g) + 6 H2O (g)

14. C25H52 (s) + 38 O2 (g)  25 CO2(g) + 26 H2O (g)

15. 2 NiS (s) + 3 O2 (g)  2 NiO (s) + 2 SO2(g)

16. C12H22O11 (s) + 12 O2 (g)  12 CO2(g) + 11 H2O (g)

17. C25H52(s) + 38O2(g) 25CO2(g) + 26H2O(l)

9. 3 Ba(NO3)2(aq) + 2 K3PO4 (aq)  Ba3(PO4)2 (s) + 6 KNO3 (aq)

10.C7H16 (l) + 11 O2 (g)  7 CO2(g) + 8 H2O (g)

11.2 NaCl (aq)  2 Na (s) + Cl2 (g

12.Mg (s) + 2 HCl (aq)  MgCl2 (aq) + H2 (aq)

13.S8 (s) + 8 O2 (g)  8 SO2(g)

14.FeCl3 (aq) + 3 KOH (aq)  Fe(OH)3 (s) + 3 KCl (aq)

15.CH4 (g) + 2 O2 (g)  CO2(g) + 2 H2O (g)