1. 8 reaction lab

2. Safety Precautions Concentrated Hydrochloric acid will
be used in this lab therefore:
Wear apron at all times
Wear goggles at all times
If you get acid on your fingers,
rinse off immediately with copious
amounts of water.

3. Safety Precautions Do not look directly at magnesium flame.
Turn Bunsen burner off when not
in use.

4. Lab Notebook Title Purpose Procedure for each rx
Observations of reactants and products
Balanced equation and indicate rx type.

5. Reaction 1 Use fine sandpaper to clean a piece of copper wire, note
appearance of wire. Using crucible
tongs, hold the wire in the hottest
part of a flame for 1 minute. Note
any changes in appearance.

6. Reaction 2 Using crucible tongs, hold a piece
of magnesium wire in the hottest
part of a flame until it ignites.
Once ignition has occurred hold wire
over a watch glass.
Do not look directly at the flame!
Examine the contents and note observations about the product.

7. Reaction 3 Place 1/2 heaping scoop spatula
of copper(II)carbonate into a
clean, dry, large test tube. Note
appearance of powder. Heat T.T. in B.B. using T.T. holder for 1 minute or so-- watch carefully and note all changes.

8. Reaction 3
If you look carefully, you will notice that a gas is being produced. How can you tell? After 1 minute insert a “burning splint” into T.T. Is combustion supported? How can you tell?

9. Reaction 3 Examine remaining contents
in test tube. Note changes; describe appearance of contents.
Dispose of product in trash can after it cools.

10. Reaction 4
Place a small piece of zinc in a small test tube. Hold tt with tt holder
Add about 1 pipette of hydrochloric acid.
Wait 10 sec, invert second tt over 1st tt.
Return to lab station
Note any energy changes, note if formation of gas bubbles, etc.
Avoid inhalation of vapors, keep away from nose.
Must have a clean dry test tube..Why?

11. Reaction 4 Place tt in tt rack Hold inverted tube with tt holder
Collect gas for at least 1 minute
Raise inverted tube, quickly insert burning splint. Record observations

12. Reaction 4 Carefully pour acid into the sink,
then carefully wash acid down sink
with water, avoid splashing.
Rinse off remaining zinc pieces and
return to small beaker in fume hood.

13. Reaction 5
Place a small nail in a small tt, place enough copper(II) sulfate in tt to just cover the nail.
Note appearance of solution and nail (Fe),
both before and after reaction.(You
may wish to place an un-reacted
sample of copper sulfate next to the
product for a comparison). Place used nail on paper towel in fume hood. Pour copper sulfate back into bottle.

14. Reaction 6 Add about 2 pipettes of zinc acetate
to a clean test tube. Next add about
2 pipettes of sodium phosphate. Note appearance of 2 solutions before, immediately after mixing and again after 15+ minutes have expired.
Note any changes? Rinse down sink.

15. Reaction 7 Place 2 pipettes full of hydrogen
peroxide into a small test tube.
Add a pinch of yeast. Tiny amount
Put thumb on top of tube, shake a little
Note changes
Wait about 1 minute.
Plunge a glowing splint into the
test tube, don’t drop it. Note changes.

16. Reaction 8 Place about 2 ml of tap water in a large test tube.
Add 1 drop of universal indicator.(Note color of solution) Look at pH chart. Report pH
Blow bubbles GENTLY into water with straw until you see a color change. The indicator is an acid-base indicator! It will turn yellow if a weak acid is present and red if the acid is a little stronger. Blue means a base is present.. Report pH.

17. Reaction 9
Heat tube with BB, point away from everyone and report what happens. Write the reaction.

18. Wash hands
Wash hands, put away equipment, wash glassware.

19. Gas tests A burning splint that goes out
indicates the presence of carbon
dioxide.
A glowing splint that bursts into
flames indicates oxygen.
A burning splint that makes a
“whoop” sound indicates hydrogen.

20. Evidence of a Chemical Reaction
Release of a gas
Color change
Formation of a precipitate Video
A solid that forms (cloudy) out of an aqueous solution and eventually falls to the bottom of the test tube by gravity.
Absorption or release of energy, light