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Laboratory Materials quiz #1

컨트롤 버튼이 '내비게이션' 모드로 변경되었습니다.
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이 집합의 용어 (10)

  • What are some common types of chemistry lab equipment and their primary uses?
    Common chemistry lab equipment includes transfer pipettes (for transferring small amounts of liquid), burettes (for precise volume delivery, especially in titrations), funnels (for transferring liquids or solids and filtration), graduated cylinders (for measuring liquid volumes), beakers (for holding and measuring larger liquid volumes), volumetric flasks (for precise dilutions), Erlenmeyer flasks (for transferring larger solution amounts), crucibles (for heating solids at high temperatures), evaporating dishes (for evaporating liquids to leave solids), spatulas and scoops (for transferring solids), and separatory funnels (for liquid-liquid separations).
  • Before adding a sample or solvent to a separatory funnel, what should you have in place?
    Before adding a sample or solvent to a separatory funnel, you should ensure that the stopcock at the bottom is closed to prevent any liquid from leaking out.
  • What is a triple beam balance used to measure in a chemistry laboratory?
    A triple beam balance is used to measure the mass of solid samples accurately in a chemistry laboratory.
  • How does a Buchner funnel differ from a regular funnel in laboratory filtration?
    A Buchner funnel is used with vacuum filtration to speed up the separation of solids from liquids, while a regular funnel is used for simple filtration or transferring substances into containers with small openings.
  • What is the purpose of a vacuum flask in conjunction with a Buchner funnel?
    A vacuum flask is connected to a vacuum source and used with a Buchner funnel to create suction, which accelerates the filtration process by drawing liquid through the filter paper more quickly.
  • Why is it important to mix a solution thoroughly after diluting it in a volumetric flask?
    Thorough mixing ensures that the solute is evenly distributed throughout the solvent, resulting in a uniform and accurate concentration of the final solution.
  • What is the difference between a hydrated and an anhydrous sample in the context of using a crucible?
    A hydrated sample contains water, while an anhydrous sample is completely dry after being heated in a crucible to remove all water content.
  • How is filter paper used with a funnel to separate a mixture in the lab?
    Filter paper is folded and placed inside a funnel to act as a porous barrier, allowing liquid to pass through while trapping solid residue for separation.
  • What is the main function of an evaporating dish in laboratory procedures?
    An evaporating dish is used to allow liquids to evaporate naturally, leaving behind solid residues without the need for oven heating.
  • What laboratory instrument is used for partitioning components between two immiscible liquids, such as in acid-base extractions?
    A separatory funnel is used to partition components between two immiscible liquids, enabling liquid-liquid separations like acid-base extractions.