Two cartoons in honor of my husband’s
birthday…
Thursday, Jan. 23rd: “A” Day
Friday, Jan. 24th: “B” Day
Agenda
Check lab write-ups for completion
Lab Discussion: “Is It An Ionic Compound?”
Lab: “Is It An Ionic Compound”
Lab will be due next time…
Lab: “Is it an Ionic Compound?”
Discussion
Test 1 sample at a time so you don’t get them
mixed up. You don’t have to start with calcium
chloride; you can start at any lab table that’s
available.
Don’t spend a lot of time at the balances; you
don’t need exactly 2.00g of each substance.
Use 2-3 tablets when testing the ibuprofen and
acetaminophen. You will need to use the mortar
and pestle to crush up the samples.
Lab: “Is it an Ionic Compound?”
Discussion
You will not need to perform any tests on the
oxygen and water samples, other than their
description/physical state, to determine if they
are ionic compounds. WHY?
You don’t need a specific melting point
temperature. Just state whether or not the
substance melted as well as your observations
upon heating.
Lab: “Is it an Ionic Compound?”
Discussion
Since we only have 1 conductivity tester, you will
need to share. It is on the cart in the back of the
room.
Be sure to rinse the conductivity tester
thoroughly with distilled water so that it’s ready
for the next person.
You will use a different test tube for heating each
sample (they are already in the test tube rack).
If your sample doesn’t melt, you can just use that
same sample to see it dissolves in water.
Lab: “Is it an Ionic Compound?”
Discussion
You will use the same beaker, rinsed and
dried, for all of the samples.
Lab: “Is it an Ionic Compound?”
Safety Items
Never taste any chemicals, even if you
KNOW they are sugar, salt, etc…
You will be using bunsen burners in this lab – make
sure hair is tied back!
When heating the test tubes, DO NOT point the
open end of the test tube at another student and
DO NOT look directly down into the test tube.
Remember: hot glass and cold glass look the same.
Put the hot test tubes back in the rack to cool
before cleaning them!
Lab: “Is it an Ionic Compound?”
Safety Items
DO NOT heat the test tubes for more than the
designated time. If it starts smoking, remove it
from the flame.
If the test tube cracks, turn off the flame and put
the test tube in the rack to cool.
DO NOT pour the ibuprofen or acetaminophen
solids down the drain. Pour the solids into the
waste funnel and then rinse your beaker in the
sink.
Lab: “Is it an Ionic Compound?”
Analysis and Conclusion Questions
All lab questions need to be answered using
COMPLETE SENTENCES!
Think about the TITLE of the lab when grouping
substances according to their properties…
When finished, be sure to CLEAN all of your
equipment and put it back where you found it.
Have fun and BE SAFE in the lab!