Multiple Choice
In an experiment investigating chemical properties, what is the purpose of adding sodium carbonate (Na2CO3) in part 1a?
72
views
1. Intro to General Chemistry
Chemical Properties
Multiple Choice
Which of the following best describes the chemical decomposition of aluminum chloride (AlCl_3) when heated?
A
AlCl_3 decomposes to form aluminum metal and chlorine gas.
B
AlCl_3 decomposes to form AlCl_2 and Cl_2 gas.
C
AlCl_3 sublimes without significant decomposition under normal conditions.
D
AlCl_3 decomposes to form Al_2O_3 and HCl gas.
Verified step by step guidance1
Step 1: Understand the nature of aluminum chloride (AlCl_3). It is a covalent compound that tends to sublime (transition from solid to gas) rather than decompose easily when heated under normal conditions.
Step 2: Consider the typical behavior of AlCl_3 upon heating. Instead of breaking down into simpler substances like aluminum metal or chlorine gas, AlCl_3 usually changes phase directly from solid to gas without significant chemical change.
Step 3: Analyze the proposed decomposition reactions: forming aluminum metal and chlorine gas would require a reduction process, which is not typical for AlCl_3 upon heating alone; forming AlCl_2 and Cl_2 gas is not a common or stable decomposition pathway; forming Al_2O_3 and HCl gas would require the presence of oxygen and moisture, which is not indicated here.
Step 4: Recognize that the correct description is that AlCl_3 sublimes without significant decomposition under normal heating conditions, meaning it transitions to gas phase intact rather than breaking down chemically.
Step 5: Conclude that the best description of AlCl_3 behavior when heated is sublimation without significant decomposition, consistent with its known physical and chemical properties.
Related Videos
Related Practice
