Each rxn is worth 4
points. Summary and Name: _____________________________
Purpose are worth 6
points. Total: 30 pts Date:
___________ Period: 1
2 3 4 5 6
Are you my type?
(Of reaction, that is!)
Purpose:
Apparatus: 1 each small, medium and large test
tubes. Test tube holder. Test tube clamp. Test tube rack. Well
plate.
Ring stand. Bunsen Burner. Crucible tongs.
Lab materials: 4 cm magnesium strip. 0.1 M Copper II sulfate solution. 0.1 M Potassium iodide solution. 0.1 M Lead II nitrate solution. Sugar.
3 M hydrochloric acid. Mossy
zinc. Wooden splints.
Reaction 1: Copper II Sulfate and Magnesium metal
Obtain a 4 cm strip of
magnesium from the instructor. Fill one
well in the plastic plate provided with copper II sulfate solution. Place your piece of magnesium metal in the
well. Leave one end sticking out for
easy removal. Wait two minutes, then
check for evidence of reaction.
Observations/data:
Reaction Type(s) :
Balanced chemical reaction:
Cleanup: Rinse solution down sink, using Q-tip to
wash out well. Save Mg for reaction 2.
Reaction 2: Magnesium and Oxygen
Wash and dry the magnesium
strip. You may need to scrub it with
your scrubby pad. Next, use crucible
tongs to hold the strip at the tip of the blue cone of a Bunsen burner flame
until the reaction begins.
Observations/data:
Reaction Type(s) :
Balanced chemical reaction:
Cleanup: Throw away product in trash can.
Reaction 3: Lead II nitrate and potassium iodide
Place approx 2 cm of potassium
iodide in a small test tube. Add 5
drops of lead II nitrate.
Observations/data:
Reaction Type(s) :
Balanced chemical reaction:
Cleanup: Pour product into beaker on teacher’s
desk. Wash test tube (use a brush!) and
invert in rack to dry.
Reaction 4: Sucrose and heat
Place 1 sugar packet's worth
of sugar in the medium test tube. Heat
the tube VERY gently over a low Bunsen burner flame. Be sure to point the tube away from yourself and others. When sugar has just begun to brown,
stop.
Observations/data:
Reaction Type(s) :
Balanced chemical reaction:
Cleanup: Fill test tube with water and place in rack
on instructors desk.
Reaction 5: Zinc and hydrochloric acid
Secure a large test tube to a
ring stand using a test tube clamp.
Place one piece of mossy zinc in the large test tube. Add enough 3 M HCl to cover the zinc. (CAUTION:
hydrochloric acid is corrosive to skin, lungs, lab partner and lab
notes. Wash skin spills under cold
running water for 5 minutes. Contact
instructor immediately for ALL spills.)
Observations/data:
Reaction Type(s) :
Balanced chemical reaction:
Cleanup: Go on to reaction 6!
Reaction 6: Hydrogen and Oxygen
After Reaction 5 has
progressed for a minute or two, hold a burning splint at the mouth of the test tube. If desired, wait one minute and repeat with
another burning splint.
Observations/data:
Reaction Type(s) :
Balanced chemical reaction:
Cleanup: Empty test tube and its contents into the
large glass "box" in the fume hood.
Rinse and wash the test tube (use a brush!) and invert it in your test
tube rack to dry.
Summarize how to recognize the five basic reaction
types:
Synthesis
Decomposition
Single Replacement
Double Replacement
Combustion