The lab setup you're referring to is commonly known as a "bubbling setup" or "gas-infusion setup." In this specific context, where hydrogen chloride gas is bubbled through acetone to form hydrochloric acid (HCl) in solution, which may lead to the formation of crystals (possibly acetone hydrochloride or similar compounds), it can also be described as a "gas washing bottle" system or "bubbler." The setup typically involves using a gas sparger or a