Essential Questions

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Essential Questions

• How is the state (or phase) of matter related
  to the movement of its particles? How does
  energy affect these states?

2

• What is the difference between a compound and a
  mixture?
• A. they both consist of atoms from different
  elements
• B. their atoms are bonded together in different
  ways.
• C. one is a solid and the other is a liquid.
• D. the components of a mixture are not chemically
  bonded together.

3

• What is the difference between a compound and a
  mixture?
• A. they both consist of atoms from different
  elements
• B. their atoms are bonded together in different
  ways.
• C. one is a solid and the other is a liquid.
• D. the components of a mixture are not chemically
  bonded together.

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Taking care of business

• Logger Pro CDs?
• Quizzes back
• Germanium Labs Graded
• If you want, you can earn back half of the points
  you missed by resubmitting within 1 week from
  today.

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18.1- Mixtures

• 1. What defines a material as being a mixture?
• 2. How can the components of a mixture be
  separated from one another?
• 3. How does distillation separate the components
  of a mixture?
• 4. Why cant the elements of a compound be
  separated from one another by physical means?

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18.1- Mixtures

• 1. What defines a material as being a mixture?
• More than 1 pure substance, which retain
  properties
• 2. How can the components of a mixture be
  separated from one another?
• Filtration, distillation, evaporation, freezing
• 3. How does distillation separate the components
  of a mixture?
• Different b.p.s allow the substances to
  separate.
• 4. Why cant the elements of a compound be
  separated from one another by physical means?
• Definition of physical bonds arent
  broken/formed

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Properties of pure ethanol and pure H2O
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Lets look at a heating graph
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Mixture what would a phase change graph look
like?

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Mixture of ethanol and water phase change graph?
Label the portions of the graph where a pure
substance is boiling off
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Mixture of ethanol and water phase change graph?
H2O warming
Pure H2O boiling off (phase change)
Pure etOH boiling off (phase change)
Mixture warming
Label the portions of the graph where a pure
substance is boiling off
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Determining ethanol and water in a fraction

• etOH and H2O have to add up to 100 (1)
• Densfract (etOH)(0.79g/cm3) (H2O)(1.00g/cm3)
• (etOH) (H2O) 1
• x y 1
• y 1-x
• So
• Densfract (x)(0.79g/cm3) (1-x)(1.00g/cm3)
• Where x etOH in the fraction

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Big Idea of the Distillation Lab

• How was the distillation lab like each of the
  following?

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• DISTILLATION LAB- Due before next class to
  turnitin.com
• Group Lab Report (20 points) Aspects
• Data Collection- record raw data
• Data Analysis- calculations
• Data Presentation- graphs labeled
• Questions- answer completely
• Manipulative Skills SAFETY- I have my data
• You will do a peer assessment of your group
  members.
• Use todays class time well- 20 min.

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Solutions

• Solution
• Homogeneous mixture
• Heterogeneous mixture
• Suspension
• Pure substance
• Solvent
• Solute
• Dissolving

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Solutions

• Solution- all components are in the same phase
• Homogeneous mixture- same composition throughout
• Heterogeneous mixture- different components can
  be seen
• Suspension- homogeneous, different phases
• Pure substance- single element or compound
• In a solution
• Solvent- component in largest amount
• Solute- any other components
• Dissolving- Solute mixing with solvent

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Solutions
Compare Contrast
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Next Class Concentration Lab

• Lab prep Read 18.2 and 18.3, taking notes
• Finish Distillation Lab before next class.
• Enjoy Full Moon (Today)