Classifying Elements and Compounds

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  • Created by: joshd
  • Created on: 01-04-14 17:21
What are the three ways you can identify the structure of most substances?
- Ionic lattice. - giant molecular covalent substance. - simple molecular covalent substance.
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How will they most likely test you in the exam on identifying the structure of a substance?
By describing the physical properties of a substance and asking you to decide which type of bonding it has and therefore what type of material it is.
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(Table on Page 55). Give examples of substances using table.(1)
Sodium chloride, magnesium sulfate and copper sulfate all conduct electricity when dissolved, but not when solid. So, they must be ionic lattices.
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(Table on Page 55). Give examples of substances using table.(2)
Hexane and liquid paraffin don't conduct electricity at all and have low melting and boiling points. So, they must be simple molecular covalent substances.
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(Table on Page 55). Give examples of substances using table.(3)
Silicon (IV) oxide doesn't conduct electricity and has high melting and boiling points, so it must be a giant molecular covalent substance.
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(Table on Page 55). Give examples of substances using table.(4)
Sucrose doesn't conduct electricity even in solution so it can't be an ionic lattice. It has a low melting point and is soluble in water, so it must be a simple molecular covalent substance.
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Card 2

Front

How will they most likely test you in the exam on identifying the structure of a substance?

Back

By describing the physical properties of a substance and asking you to decide which type of bonding it has and therefore what type of material it is.

Card 3

Front

(Table on Page 55). Give examples of substances using table.(1)

Back

Preview of the front of card 3

Card 4

Front

(Table on Page 55). Give examples of substances using table.(2)

Back

Preview of the front of card 4

Card 5

Front

(Table on Page 55). Give examples of substances using table.(3)

Back

Preview of the front of card 5
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