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Balancing Chemical Equations Worksheet, Exercises of Chemistry

Excersice on balancing chemical equations

Typology: Exercises

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Chapter 7 Worksheet #1
Balancing Chemical Equations
Balance the equations below:
1) ____ N2 + ____ H2 ๎›† ____ NH3
2) ____ KClO3 ๎›† ____ KCl + ____ O2
3) ____ NaCl + ____ F2 ๎›† ____ NaF + ____ Cl2
4) ____ H2 + ____ O2 ๎›† ____ H2O
5) ____ Pb(OH)2 + ____ HCl ๎›† ____ H2O + ____ PbCl2
6) ____ AlBr3 + ____ K2SO4 ๎›† ____ KBr + ____ Al2(SO4)3
7) ____ CH4 + ____ O2 ๎›† ____ CO2 + ____ H2O
8) ____ C3H8 + ____ O2 ๎›† ____ CO2 + ____ H2O
9) ____ C8H18 + ____ O2 ๎›† ____ CO2 + ____ H2O
10) ____ FeCl3 + ____ NaOH ๎›† ____ Fe(OH)3 + ____NaCl
11) ____ P + ____O2 ๎›† ____P2O5
12) ____ Na + ____ H2O ๎›† ____ NaOH + ____H2
13) ____ Ag2O ๎›† ____ Ag + ____O2
14) ____ S8 + ____O2 ๎›† ____ SO3
15) ____ CO2 + ____ H2O ๎›† ____ C6H12O6 + ____O2
16) ____ K + ____ MgBr2 ๎›† ____ KBr + ____ Mg
17) ____ HCl + ____ CaCO3 ๎›† ____ CaCl2 + ____H2O + ____ CO2
18) ____ HNO3 + ____ NaHCO3 ๎›† ____ NaNO3 + ____ H2O + ____ CO2
19) ____ H2O + ____ O2 ๎›† ____ H2O2
20) ____ NaBr + ____ CaF2 ๎›† ____ NaF + ____ CaBr2
21) ____ H2SO4 + ____ NaNO2 ๎›† ____ HNO2 + ____ Na2SO4
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Chapter 7 Worksheet

Balancing Chemical Equations

Balance the equations below:

1) ____ N 2 + ____ H 2 ร† ____ NH 3

2) ____ KClO 3 ร† ____ KCl + ____ O 2

3) ____ NaCl + ____ F 2 ร† ____ NaF + ____ Cl 2

4) ____ H 2 + ____ O 2 ร† ____ H 2 O

5) ____ Pb(OH) 2 + ____ HCl ร† ____ H 2 O + ____ PbCl 2

6) ____ AlBr 3 + ____ K 2 SO 4 ร† ____ KBr + ____ Al 2 (SO 4 ) 3

7) ____ CH 4 + ____ O 2 ร† ____ CO 2 + ____ H 2 O

8) ____ C 3 H 8 + ____ O 2 ร† ____ CO 2 + ____ H 2 O

9) ____ C 8 H 18 + ____ O 2 ร† ____ CO 2 + ____ H 2 O

10) ____ FeCl 3 + ____ NaOH ร† ____ Fe(OH) 3 + ____NaCl

11) ____ P + ____O 2 ร† ____P 2 O 5

12) ____ Na + ____ H 2 O ร† ____ NaOH + ____H 2

13) ____ Ag 2 O ร† ____ Ag + ____O 2

14) ____ S 8 + ____O 2 ร† ____ SO 3

15) ____ CO 2 + ____ H 2 O ร† ____ C 6 H 12 O 6 + ____O 2

16) ____ K + ____ MgBr 2 ร† ____ KBr + ____ Mg

17) ____ HCl + ____ CaCO 3 ร† ____ CaCl 2 + ____H 2 O + ____ CO 2

18) ____ HNO 3 + ____ NaHCO 3 ร† ____ NaNO 3 + ____ H 2 O + ____ CO 2

19) ____ H 2 O + ____ O 2 ร† ____ H 2 O 2

20) ____ NaBr + ____ CaF 2 ร† ____ NaF + ____ CaBr 2

21) ____ H 2 SO 4 + ____ NaNO 2 ร† ____ HNO 2 + ____ Na 2 SO 4

Word Equations

Write the word equations below as chemical equations and balance:

1) Zinc and lead (II) nitrate react to form zinc nitrate and lead.

2) Aluminum bromide and chlorine gas react to form aluminum chloride and bromine gas.

3) Sodium phosphate and calcium chloride react to form calcium phosphate and sodium

chloride.

4) Potassium metal and chlorine gas combine to form potassium chloride.

5) Aluminum and hydrochloric acid react to form aluminum chloride and hydrogen gas.

6) Calcium hydroxide and phosphoric acid react to form calcium phosphate and water.

7) Copper and sulfuric acid react to form copper (II) sulfate and water and sulfur dioxide.

8) Hydrogen gas and nitrogen monoxide react to form water and nitrogen gas.

Word Equations โ€“ Answer Key

  1. Zinc and lead (II) nitrate react to form zinc nitrate and lead.

Zn + Pb(NO 3 ) 2 ร† Zn(NO 3 ) 2 + Pb


  1. Aluminum bromide and chlorine gas react to form aluminum chloride and bromine gas.

2 AlBr 3 + 3 Cl 2 ร† 2 AlCl 3 + 3 Br 2


  1. Sodium phosphate and calcium chloride react to form calcium phosphate and sodium chloride.

2 Na 3 PO 4 + 3 CaCl 2 ร† 6 NaCl + Ca 3 (PO 4 ) 2


  1. Potassium metal and chlorine gas combine to form potassium chloride.

2 K + Cl 2 ร† 2 KCl


  1. Aluminum and hydrochloric acid react to form aluminum chloride and hydrogen gas.

2 Al + 6 HCl ร† 3 H 2 + 2 AlCl (^3)


  1. Calcium hydroxide and phosphoric acid react to form calcium phosphate and water.

3 Ca(OH) 2 + 2 H 3 PO 4 ร† Ca 3 (PO 4 ) 2 + 6 H 2 O


  1. Copper and sulfuric acid react to form copper (II) sulfate and water and sulfur dioxide.

Cu + 2 H 2 SO 4 ร† CuSO 4 + 2 H 2 O + SO 2


  1. Hydrogen gas and nitrogen monoxide react to form water and nitrogen gas.

2 H 2 + 2 NO ร† 2 H 2 O + N (^2)