This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Here are the solutions to the questions: 17. The following are ways of ensuring crystal formation from a solution except _____ A. Oven Drying Oven drying is primarily used to remove residual solvent from already formed crystals or to evaporate a solvent to dryness, not to initiate or ensure crystal formation from a solution. Seeding, cooling, and scratching the container walls are all methods used to promote the nucleation and growth of crystals. 18. Distillation can be used to separate _____ B. a liquid from a solution Distillation is a process that separates components of a liquid mixture based on differences in their boiling points. This can involve separating a volatile liquid solvent from a non-volatile solid solute (e.g., water from saltwater) or separating two or more liquids with different boiling points (e.g., ethanol from water). Option B is the most general and accurate description. 19. The four main steps in using a fire extinguisher are _____ C. Pull, Aim, Squeeze, & Sweep This sequence is commonly known by the acronym P.A.S.S.: Pull the pin. Aim the nozzle at the base of the fire. Squeeze the handle. Sweep the nozzle from side to side. 20. The principal glassware used in the liquid-liquid extraction is _____ D. Separatory funnel A separatory funnel is specifically designed for liquid-liquid extraction. It allows two immiscible liquid phases to be thoroughly mixed and then cleanly separated by draining the lower layer through a stopcock. Last free one today — make it count tomorrow, or type /upgrade for unlimited.