What is the term for the process when chlorine gas is bubbled into an aqueous solution of potassium iodide?

The process that occurs when chlorine gas is bubbled into an aqueous solution of potassium iodide is termed a displacement reaction. In this context, chlorine gas, which is more reactive than iodide ions, displaces the iodide ions from the potassium iodide solution. This results in the formation of potassium chloride and iodine.

Displacement reactions, also known as single replacement reactions, involve one element being replaced by another in a compound. The reactivity series of halogens shows that chlorine is a stronger oxidizing agent compared to iodide, which explains why it can effectively displace iodide from its compound. The observation of a color change as iodine is produced further supports this classification of the reaction.

Other types of reactions such as neutralization, decomposition, and combustion do not accurately describe the interaction taking place in this scenario. Neutralization involves an acid reacting with a base to produce salt and water, decomposition refers to a single compound breaking down into simpler substances, and combustion involves a substance reacting with oxygen to produce heat and light, typically producing carbon dioxide and water. Therefore, the displacement reaction is the most appropriate term for what occurs with chlorine and potassium iodide.