Review of Chemical Reaction Types and Equations Answer Key (CHEM 1405)

Back to Chemistry 1405 Practice Problems

Balance the following equations and identify them as synthesis (S), decomposition (D), single replacement (SR), double replacement (DR) or combustion (C).

 

__D__ 1.    2KClO₃         2KCl     +     3O₂

 

__DR_ 2.     Pb(NO₃)₂    +     2KI         PbI₂     +     2KNO₃

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__C__ 3.     C₃H₈     +     5O₂         3CO₂     +     4H₂O

 

__SR_ 4.     2AlBr₃     +     3Cl₂         2AlCl₃     +     3Br₂

 

__S__ 5.     3H₂     +     N₂         2H₃N

 

 

Identify the type of reaction and write a balanced equation.

__SR_ 6.  chlorine  +  potassium bromide  

          Cl₂     +     2KBr         2KCl     +     Br₂

 

__S__ 7.  copper  +  oxygen       (copper I)

          4Cu     +     O₂         2Cu₂O

 

__DR_ 8.  potassium carbonate  +  sodium hydroxide  

          K₂CO₃     +     2NaOH         2KOH     +     Na₂CO₃

 

__C__ 9.  hexane (C₆H₁₄)  +  oxygen  

          2C₆H₁₄     +     19O₂         12CO₂     +     14H₂O

 

__D__ 10.  nickel II bromide  

          NiBr₂         Ni     +     Br₂

 

11.  Write a balanced equation for the combustion of butane (C₄H₁₀).

2C₄H₁₀     +     13O₂         8CO₂     +     10H₂O

 

 

Use your Activity Series table to write balanced equations for the following reactions.  If no reaction occurs write “NR”.

12.  sodium +  potassium nitrate  

Na     +     KNO₃         NR

 

13.  calcium +  hydrogen acetate (acetic acid)  

Ca     +     2HC₂H₃O₂         Ca(C₂H₃O₂)₂     +     H₂

 

14.  sodium +  water

2Na     +     2H₂O         2NaOH     +     H₂

 

15.  calcium + zinc chloride

Ca     +     ZnCl₂         CaCl₂     +     Zn

 

16.  fluorine +  lithium bromide  

F₂     +     2LiBr         2LiF     +     Br₂

 

 

Balance the following equation:

4Sn    +    10HNO₃        4Sn(NO₃)₂    +    NH₄NO₃   +   3H₂O