Question

Classify each of these reactions with respect to the following categories: combination reaction, decomposition reaction, combustion reaction, and single‑displacement reaction. a. Fe2(CO3)2(s) Fe2O3(s) 2CO2(g) ∆ b. 2C6H11OH(l ) 17O2(g) → 12CO2(g) 12H2O(l ) c. P4O10(s) 6H2O(l ) → 4H3PO4(aq) d. 2C(s) MnO2(s) Mn(s) 2CO(g) ∆ e. 2NaClO3(s) 2NaCl(s) 3O2(g)

Answer 1

Answer:

a. decomposition reaction

b. Combustion reaction

c. Combination reaction

d. Single displacement reaction

e. Decomposition reaction

Explanation:

Here's a tip that might help you get through categorizing chemical reactions like this:

A combination reaction is when two or more reactants COMBINE to form a single product. This is also known as synthesis reaction. If you look a the chemical equation, it will have a form somewhat like this:

Reactant/s         Product

 A + B         →         AB

Taking your problem into consideration, letter c is a combination reaction because it started out as two reactants and combined to form one product.

P₄O₁₀ + 6H₂O      →   4H₃PO₄

  Reactants              Product

A decomposition reaction is when one reactant DECOMPOSES or breaks down into two or more products.

Reactant          Product

    AB         →        A + B

Your problem has 2 decomposition reactions, which are letters, a and e because if you notice, you have one reactant and it split into two products.

Fe₂(CO₃)     →       Fe₂O₃ + 2CO₂

Reactant               Product

2NaClO₃     →       2NaCl + 3O₂

Reactant               Product

A single displacement reaction is when one element or compound is displaced by another element or compound.

Reactants       Product

  AB + C     →    AC + B

                 or

  A + BC     →    AC + B

 

Your problem has letter d as your example of single-displacement.

2C + MnO₂ → Mn + 2CO₂

  A + BC     →  B   +   AC

Reactant           Product

A combustion reaction on the other hand occurs when hydrocarbons react with oxygen and heat. The product of a combustion reaction is ALWAYS carbon dioxide (CO₂) and water (H₂O).

        Reactants                        Product

Hydrocarbon   + O₂     →     CO₂    + H₂O

Lastly, your problem has letter b as an example of a combustion reaction. Notice that the product of the reaction is CO₂ and H₂O.

2C₆H₁₁OH  +   17O₂    →    12CO₂    + 6H₂O    

Hydrocarbon   + O₂     →     CO₂    + H₂O

These clues might help you next time.