Transcript HEATING BAKING SODA

HEATING BAKING SODA
EXPERIMENT 1.1
AIM :
What happens if some baking
soda is heated in a test tube?
What safety precautions must be
taken during this experiment?
EQUIPMENT
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Goggles and apron
Peg board and clamp
Test tube with baking soda
Glycerin and towel
#2 1-hole stopper and short glass bend
Long rubber tubing
Gas collection bottle and bucket
Alcohol burner and wire stand
2 test tubes with brewed tea
What do you predict will happen
when the baking soda is heated?
Scoopula
Materials needed for Part 1 of the experiment – Can you identify them?
Add a pencil’s width of Baking Soda to the test tube.
Set up the the test tube with baking soda and the alcohol burner.
Notice that the test tube is clamped to the pegboard and sits on
the wire stand. Why do you think that it is angled?
Safety Equipment that will be used in this
experiment
In our
experiments
this year we
will use a
form of
Alcohol,
called
Methanol, as
our burner
fuel.
Goggles and Apron must be worn
whenever we use an alcohol burner!!
You must be very careful when inserting any
glassware into a rubber stopper!!
The stopper must be
lubricated with Glycerin and
held with a towel when
inserting the glass bend.
Add a drop of Glycerin to the stopper.
Hold the
stopper with
the towel.
Hold the glass
bend near the
tip as you
insert it into
the stopper.
About 1/8” of the glass bend
should protrude from the
bottom of the stopper.
Fill the bucket ½ full with water and fill the gas
collection bottle.
This is how your final setup should look.
After you have finished heating the baking soda, always remove
the rubber tubing from the gas collection bottle before
extinguishing the flame.
What might happen if you extinguish the flame first?
Setup for Tea Test
Place 10 cc. of tea in each test tube. Add the heated solid to
one test tube and regular baking soda to the other. Observe.
Can you pick out the
problems with this set up?
What problems can you find with the way this
experiment is being run?