1-2 PRE-LAB Using BP to Identify Unknown Liquids
Presentation
•
Science
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11th Grade
•
Practice Problem
•
Easy
ShariAnn Cayer
Used 10+ times
FREE Resource
19 Slides • 16 Questions
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Fill in the Blanks
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Multiple Choice
Which of the following is true regarding the SOLVENTS you are going to attempt to identify?
They are often used to restore or clean artwork.
They can be used to dissolve paint.
They are used to create mixtures.
All of the above are true.
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Multiple Choice
Which best describes the appearance of the two liquids you are going to identify?
opaque, clear
transparent, colorless
transparent, reflective
transparent, white
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Multiple Choice
Which PHYSICAL PROPERTY are you going to use in order to determine the identify of the two liquids?
melting point
appearance
boiling point
density
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Drag and Drop
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Multiple Choice
Once they have gained enough energy, they will reach their boiling point. This is when they will
continue to slide past their neighbors.
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Dropdown
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Drag and Drop
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Multiple Choice
In order to know when the unknown substances have reached their boiling points, you should look for :
the first sign of bubbles forming anywhere in the sample.
a steady stream of bubbles forming at the bottom of the sample
a steady stream of bubbles forming at the top of the sample
the last bubble to form and rise to the surface
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Dropdown
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23
Multiple Choice
What we really see when we notice a bubble is
liquid particles that have solidified
a space filled with nothing
the border between the gas and the liquid surrounding it
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Dropdown
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Dropdown
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Multiple Choice
Which model represents a sample of hexane particles at a temperature BELOW its boiling point?
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Multiple Choice
The red arrows in this model represent:
the pressure exerted by the gas particles on the surrounding liquid
the pressure exerted by the liquid particles on the gas particles inside the bubble
the temperature of the gas particles inside the bubble
the number of gas particles present inside the bubble
35
Multiple Choice
Does the chemical composition of a particle change when it boils and escapes from the sample as a gas?
NO - the number and types of atoms that make up the particles does not change!
YES - changing into a gas causes the number and types of atoms that make up the particles to change!
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