You Light up my Life!

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You Light up my Life!

• Lab Activity

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ChemCatalyst

• If you were to drop a spoonful of salt, NaCl,
  into a glass of water, what would happen? If you
  were to drop a gold ring into a glass of water,
  what would happen?
• What do you think is different about the atoms
  of these two substances? Why wouldnt the
  individual gold atoms come apart?

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The Big Question

• What patterns do we see in the properties of
  substances?

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At the end of this lab

• You will be able to
• Predict whether MgSO4(aq), epsom salts, will
  conduct electricity.

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Lab Set-up
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Activity

• Purpose This lesson allows you to collect
  evidence regarding some of the properties of
  substances, and look for patterns.

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Predictions Predictions Test Results Test Results
Substances Conduct? Yes/No Dissolve? Yes/No Conduct? Yes/No Dissolve? Yes/No
H2O(l), water
Al(s), foil aluminum
C12H22O11(s), sucrose (sugar)
NaCl(s), salt, sodium chloride
SiO2(s), sand, silicon dioxide
C20H42(s), paraffin (wax)
C2H6O(l), ethanol
Cu(s), copper
CaCl2(s), calcium chloride
CuSO4(s), copper sulfate
No
N/A
Yes
No
No
Yes
Yes
Yes
No
No
No
No
No
Yes
Yes
No
Yes
Yes
Yes
Yes
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(cont.)
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1. Substances that dont Dissolve in water, BUT
conduct electricity

• Copper
• Aluminum foil

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2. Substances that dissolve in water 2. Substances that dissolve in water
Conduct Dont conduct

Salt-NaCl Calcium-ChlorideCaCl2 Copper
Sulfate-CuSO4 They are all IONIC BONDS
Sugar-C12H22O11 Ethanol-C2H6O Water-H2O They are
all COVALENT BONDS!
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Dissolves
Wrap up
Yes
No
Conducts
Conducts
Yes
Yes
No
No
NaCl salt CaCl2 calcium chloride CuSO4 copper sulfate H2O water C12H22O11 sugar C2H6O ethanol Au gold Cu copper Al aluminum SiO2 sand C20H42 paraffin
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3. What do the substances that conduct
electricity once dissolved have in common?

• They are all made up of ionic bonds. Ionic bonds
  are made up of a metal and a non-metal. Metals a
  good conductors of heat and electricity.

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4. What do the substances that Dont conduct
electricity once dissolved have in common?

• They are all made up of covalent bonds. Covalent
  bonds are made up of all non-metals. Non-Metals a
  NOT good conductors of heat and electricity.

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5. 6. Write a generalizing statement about the
substances that DO and Dont light up the bulb.

• Hint
• Think about bonds
• What the bonds are made up of
• Any properties

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7. Predict whether isopropanol, C3H8O (l), will
conduct electricity.

• No because it is all made up of covalent bonds
  and covalent bonds are made up of all non-metals.
  Non-Metals a NOT good conductors of heat and
  electricity.

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Making Sense

• If it is dangerous to take a bath with a blow
  dryer, what must also be true about the water in
  the bathtub?

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Check-In

• Predict whether MgSO4(aq), epsom salts, will
  conduct electricity. State your reasoning.

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Question?

• The element K is located between Na and Rb.
  Based on where it is located on the periodic
  table, what are some properties that we can
  predict about K?