问题 22 分 The caffeine will initially be extracted from the solid tea by boiling in [选择] ["alcohol", "alkane", "haloalkane", "water", "other"] , but then separated by other compounds by extraction with [选择] ["alcohol", "alkane", "haloalkane", "water", "other"] solvent. 标记问题：问题 3 问题 31 分 Typically an extraction will work better to separate a substance when a solute is [选择] ["equally soluble", "differently soluble", "other"] in two solvents. Extractions are more efficient with [选择] ["one large extraction", "several smaller extractions", "other"] . 标记问题：问题 4 问题 41 分 If 1,2-dichloroethane has a density of 1.23 g/ml, how do you expect it to sit in a separatory funnel with an aqueous solution? 答案选项组 1,2-dichloroethane is the upper layer and the aqueous is the lower layer. 1,2-dichloroethane is the lower layer and the aqueous is the upper layer. you will get an emulsion the two solvents will dissolve in each other none of these