What types of chemical reactions are the following?
Column A
1. 2 H2O → 2H2 + 02
2. 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
+ 6 H2O
3. 2 Na + CI2 → 2 NaCI
4. 4 AIBr3 + 3O2 → 2
AI2O3 + 6 Br2
5. KCI + NAI → KI + NaCI
Column B
a. Decomposition
b. Single Replacement
c. Combustion
d. Synthesis
e. Double Replacement
Column A
1. c. Combustion
2. c. Combustion
3. e. Double Replacement
4. a. Decomposition
5. e. Double Replacement
Column A:
1. 2 H2O → 2H2 + O2 - This is a decomposition reaction.
2. 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O - This is a combustion reaction.
3. 2 Na + Cl2 → 2 NaCl - This is a synthesis reaction.
4. 4 AlBr3 + 3O2 → 2 Al2O3 + 6 Br2 - This is a synthesis reaction.
5. KCl + NaI → KI + NaCl - This is a double replacement reaction.
Column B:
a. Decomposition
b. Combination
c. Combustion
d. Combination
e. Double Replacement
To determine the types of chemical reactions in Column A, let's analyze each equation one by one:
1. 2 H2O → 2H2 + 02
This equation represents the breakdown of water molecules into hydrogen and oxygen gases. The reactant is a single compound (water), which decomposes into two different elements (hydrogen and oxygen). Therefore, this is an example of a decomposition reaction. The answer for this equation in Column B would be "a. Decomposition."
2. 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
In this equation, ethane (C2H6) and oxygen gas (O2) combine to form carbon dioxide (CO2) and water (H2O). This reaction involves the combination of two or more substances to form a more complex compound. Hence, it is a synthesis reaction. The answer for this equation in Column B would be "d. Synthesis."
3. 2 Na + CI2 → 2 NaCI
Sodium (Na) reacts with chlorine (CI2) to produce sodium chloride (NaCI). This type of reaction involves the exchange of elements between two compounds. It is known as a double replacement reaction. The answer for this equation in Column B would be "e. Double Replacement."
4. 4 AIBr3 + 3O2 → 2 AI2O3 + 6 Br2
This equation represents the reaction between aluminum bromide (AIBr3) and oxygen gas (O2), which leads to the formation of aluminum oxide (AI2O3) and bromine gas (Br2). When a compound reacts with oxygen and produces an oxide along with the liberation of another element, it is called a combustion reaction. The answer for this equation in Column B would be "c. Combustion."
5. KCI + NAI → KI + NaCI
In this reaction, potassium chloride (KCI) and sodium iodide (NAI) swap their negative ions to form potassium iodide (KI) and sodium chloride (NaCI). This is another example of a double replacement reaction because the positive and negative ions exchanged between the two compounds. The answer for this equation in Column B would also be "e. Double Replacement."