separation techniques

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson
Download our mobile app to listen on the go
Get App

Questions and Answers

In a mixture, all substances must have the same melting point.

False (B)

Which process is used to separate a mixture based on different boiling points?

  • Filtration
  • Evaporation
  • Distillation (correct)
  • Chromatography

The liquid that passes through the filter paper during filtration is called the ______.

filtrate

What is a saturated solution?

<p>A solution where no more solute can dissolve at a given temperature (B)</p> Signup and view all the answers

Temperature has no effect on the amount of solute that can be dissolved in a solution.

<p>False (B)</p> Signup and view all the answers

What two components must you identify to describe a solution?

<p>Solute and solvent</p> Signup and view all the answers

Which of the following techniques relies on particle size to separate components?

<p>Filtration (B)</p> Signup and view all the answers

In chromatography, the resulting pattern of separated substances is called a ______.

<p>chromatogram</p> Signup and view all the answers

What information can be gained by interpreting temperature change data of a substance?

<p>The purity of the substance (B)</p> Signup and view all the answers

What is the purpose of using particle diagrams when discussing solutions?

<p>To represent solutions and substances visually</p> Signup and view all the answers

Evaporation can be used to separate all types of mixtures.

<p>False (B)</p> Signup and view all the answers

Which separation technique is most suitable for separating colored pigments?

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

The substance that dissolves in a solvent is called the ______.

<p>solute</p> Signup and view all the answers

Which of the following is NOT a use of filtration?

<p>Separating dissolved sugar from water (C)</p> Signup and view all the answers

If you have a mixture of salt, sand, and water, describe the steps you would take to separate each component.

<p>First, filter the mixture to remove the sand. Then, evaporate the water to obtain the salt.</p> Signup and view all the answers

Match the separation technique with the property it exploits:

<p>Filtration = Particle size Distillation = Boiling point Evaporation = Volatility Chromatography = Affinity to a stationary phase</p> Signup and view all the answers

Explain how chromatography is used to monitor the progress of reactions.

<p>Chromatography can separate reactants and products, allowing for quantitative analysis of their changing concentrations over time to gauge reaction progress.</p> Signup and view all the answers

In what situation is evaporation or distillation NOT suitable for separating a mixture?

<p>When the mixture consists of only solid particles. (D)</p> Signup and view all the answers

When using chromatography to separate a mixture, the degree to which a component moves up the chromatography paper is related to its ______ to the solvent, its ______ to the stationary phase, and the ______ of the solvent.

<p>solubility | affinity | polarity</p> Signup and view all the answers

If two substances have identical Rf values in multiple chromatography systems using different solvents and stationary phases, it definitively confirms they are the same substance.

<p>False (B)</p> Signup and view all the answers

Flashcards

Mixture Composition

Parts of mixtures are not chemically joined.

Melting Points in Mixtures

In a mixture, each substance retains its own distinct melting point.

Solvent

A substance that dissolves another (solute).

Solute

The substance being dissolved in a solvent.

Signup and view all the flashcards

Solution

A homogeneous mixture of solute and solvent.

Signup and view all the flashcards

Saturated Solution

The maximum amount of solute that can dissolve in a solvent at a specific temperature.

Signup and view all the flashcards

Solubility

The ability of a solute to dissolve in a solvent.

Signup and view all the flashcards

Filtrate

The liquid that passes through filter paper.

Signup and view all the flashcards

Residue

The solid left behind on the filter paper.

Signup and view all the flashcards

Evaporation

Separating a soluble solid from a liquid by boiling off the liquid.

Signup and view all the flashcards

Distillation

Separating liquids with different boiling points.

Signup and view all the flashcards

Chromatography

A method of separating chemicals based on different affinities.

Signup and view all the flashcards

Study Notes

Mixtures (C2 2.1)

  • Parts of mixtures are not joined together.
  • Different substances in mixtures have different melting points.
  • Describe particle arrangements in mixtures.
  • Identify pure substances.
  • Use particle models to represent mixtures.
  • Comment on a substance’s purity by interpreting temperature change data.

Solutions (C2 2.2)

  • Identify a solvent, solute, and solution in a given scenario.
  • A solution contains dissolved particles.
  • Describe solutions using key words.
  • Use the particle model to explain dissolving.
  • Explain the relationship between solutes, solvents, and solutions.
  • Draw particle diagrams to represent solutions and pure substances.

Solubility (C2 2.3)

  • Describe what happens when a solute dissolves.
  • Describe how temperature affects solubility.
  • Explain what a saturated solution is.
  • Explain the meaning of solubility.
  • Explain why temperature affects the amount of solute dissolved in a solution.
  • Explain what a solubility graph shows.

Filtration (C2 2.4)

  • Name the filtrate and residue in given situations.
  • State some situations in which filtering is used.
  • Explain how filtration works.
  • Describe how to filter a mixture.
  • Use particle diagrams to illustrate how filtering works.
  • Explain whether or not filtering can be used in given situations.

Evaporation and Distillation (C2 2.5)

  • State some mixtures can be separated using evaporation.
  • State some mixtures can be separated using distillation.
  • Explain how to use evaporation to separate mixtures.
  • Explain how distillation works.
  • Compare evaporation and distillation.
  • Discuss whether evaporation or distillation would be suitable for separating a mixture.

Chromatography (C2 2.6)

  • State what happens to mixtures when they undergo chromatography.
  • Describe what a chromatogram looks like.
  • Explain how chromatography separates mixtures.
  • Analyse chromatograms to identify substances in mixtures.
  • Explain how chromatography can be used in different scenarios.
  • Consider how chromatography can be used to monitor the progress of reactions.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Related Documents

Use Quizgecko on...
Browser
Browser