Name: Diagram: About: When it’s Used: Flat-bladed micro spatula Scoopula A tiny, unevenly shaped Used when heating chemical piece of substance added reactions to prevent “bumping” Boiling chips to liquids to make them boil or violent bubbles. Usually just more calmly. They are a few are added to reaction usually made from porous vessel. pieces of alumina, carbon, etc Traditionally made of Commonly used in vacuum porcelain. (Hirsch funnel filtration operation. Filter paper Buchner funnel has a similar design; it is is usually added on top to used similarly, but for collect solid. smaller quantities of material.) In this course, this was used in experiment #30 during the Three-neck Grignard reaction. One opening round-bottom contained the separatory flask funnel. One had a stopper. The third opening has a condenser with a drying tube on top. The apparatus is included below in this table under “Grignard Reaction” Usually used in liquid-liquid Separatory extractions and also for funnel washing solvents. Two layers can be separated by allowing one to flow out into a flask or beaker. Used to condense (change [West] the physical state of) a Condenser substance from its gaseous to its liquid state Drying Tube Essentially a glass tube Encountered in Expt #30. This packed with a drying agent. ensured that any moisture Its function is to keep its would not enter into the hos vessel dry and free Grignard reaction, which was from any moisture, meant to be as dry as possible. Used to test the presence of starch, producing Encountered in experiment #7, Iodide-starch color. This indicator to test the presence of excess test paper is impregnated with bleach, the oxidant. starch and potassium iodide what twill will oxidize ions to iodine, making the dark color. Used primarily in vacuum Thick-walled with a side filtration. Sidearm attached to Filter flask arm on its neck inlet of water aspirator or to a vacuum line.
Name: Diagram: About: When it’s Used: Flat-bladed micro spatula Scoopula Boiling chips A tiny, unevenly shaped piece of substance added to liquids to make them boil more calmly. They are usually made from porous pieces of alumina, carbon, etc Used when heating chemical reactions to prevent “bumping” or violent bubbles. Usually just a few are added to reaction vessel. Buchner funnel Traditionally made of porcelain. (Hirsch funnel has a similar design; it is used similarly, but for smaller quantities of material.) Commonly used in vacuum filtration operation. Filter paper is usually added on top to collect solid. Three-neck round-bottom flask In this course, this was used in experiment #30 during the Grignard reaction. One opening contained the separatory funnel. One had a stopper. The third opening has a condenser with a drying tube on top. The apparatus is included below in this table under “Grignard Reaction” Separatory funnel Usually used in liquid-liquid extractions and also for washing solvents. Two layers can be separated by allowing one to flow out into a flask or beaker. [West] Condenser Used to condense (change the physical state of) a substance from its gaseous to its liquid state Drying Tube Essentially a glass tube packed with a drying agent. Its function is to keep its hos vessel dry and free from any moisture, Encountered in Expt #30. This ensured that any moisture would not enter into the Grignard reaction, which was meant to be as dry as possible. Iodide-starch test Used to test the presence of starch, producing color. This indicator paper is impregnated with starch and potassium iodide what twill will oxidize ions to iodine, making the dark color. Encountered in experiment #7, to test the presence of excess bleach, the oxidant. Filter flask Thick-walled with a side arm on its neck Used primarily in vacuum filtration. Sidearm attached to inlet of water aspirator or to a vacuum line.
chem-222-lab-exam-review.docx