Take out your homework
AND your logic diagram
Take out your homework:
• Any questions on reading or 1-3?
• Any questions on proteins/enzymes in general?
Before we start…
• If we ever have a chance at dissecting anything in this
class or do more labs… ever, you need to show me you’re
responsible
• That starts with respecting each other and me
• Cleaning up after yourselves
• Taking responsibility for your own actions
Three Alcohols
Ethanol
Isopropanol
Butanol
Three Alcohols
• On a sheet of paper in your notebook:
• Title it “Three Alcohols Lab”
• Put the date and your group members
• Write the names of the alcohols we’ll be working with…
• And characteristics you notice about them
Three Alcohols
Ethanol
Isopropanol
Butanol
Characteristics?
• Numbers of Carbons?
• OH groups?
• How will each of them interact with water?
Three Alcohols
• BRIEFLY write the protocol as we go
• Write a headings for protocol and results:
Protocol/Methods:
Predictions:
Results:
Ethanol
Isopropanol
Butanol
Three Alcohols Lab (con’t)
• On your tables you have ETOH, ISO and water
• Place a drop of water and a drop of alcohol on your inner
arm
• Record your observations
• Remember Observations are more than just “looking at
things”!
Three Alcohols
• Fill your test tubes about 1/3 full of water
• Place of sheet of paper under the test-tube rack and label
each tube ‘Ethanol’, ‘Isopropanol’, or ‘Butanol’
• Write a prediction (in your notes) for each alcohol as to
how they will interact with water
• CAREFULLY add 5-10 drops of each alcohol into the
appropriately- labeled tube (that’s one type of alcohol into
EACH tube)
• Record your results
Three Alcohols
• Place a piece of parafilm wax over each tube
• CAREFULLY invert each tube with your thumb over the end
and return it to the upright position
• Place each tube back into the rack (at the appropriately
labeled position)
• Record your results
• After 4 min, record results again
Three Alcohols
• CLEAN UP!!!
• Alcohol/water can go down the drain
• Rinse out tubes and return to rack upside down
• Return things to the state you found them when you came
in!!
• Work on Lab Sheet as a group (?)
• If your lab station isn’t as it was when you came in, you get
a 0 (zero) on the lab sheet.
Three Alcohols Lab
• You should be able to explain ALL your results based on
what you know about molecules, charges and interactions.
• THOUGHTFULLY finish the lab sheet as a group!
Homework
• Review for Test!