Centrifugation, Decantation, and Filtration Quiz

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Questions and Answers

What is the purpose of centrifugation?

  • Analyzing complicated material samples
  • Pouring a liquid gently to avoid disturbing solids
  • Purifying a solid based on solubility
  • Separating solid matter from a liquid suspension (correct)

Which process involves pouring a liquid gently to avoid disturbing the solid at the bottom of the container?

  • Centrifugation
  • Filtration
  • Recrystallization
  • Decantation (correct)

What is the liquid that passes through the filter paper called?

  • Flocculent
  • Precipitate
  • Centrifugate
  • Filtrate (correct)

What are substances other than the analyte that affect the final measurement called?

<p>Interferences (C)</p> Signup and view all the answers

What is the key to recrystallization as a purification technique for solids?

<p>Minimum amount of solvent (D)</p> Signup and view all the answers

What is the purpose of cooling the filtrate?

<p>To remove soluble impurities (B)</p> Signup and view all the answers

What is the principle behind distillation as a purification method?

<p>Separation based on the boiling points of contaminants and the liquid to be purified (A)</p> Signup and view all the answers

What distinguishes fractional distillation from simple distillation?

<p>Fractional distillation includes repeated evaporation-condensation steps in a fractionating column (D)</p> Signup and view all the answers

In Liquid-Liquid Extraction, why is there a need to separate the analyte from the original solvent?

<p>Due to interference with the analysis technique chosen (C)</p> Signup and view all the answers

What is the purpose of leaving the separatory funnel undisturbed after shaking in Liquid-Liquid Extraction?

<p>To allow time for the immiscible layers to separate again (C)</p> Signup and view all the answers

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