Types of Chemical Reactions Lab
In this lab you will relate written equations, including the states of matter, to observed reactions. You will also build upon your
understanding of patterns of chemical reactions and review writing formulas and balancing equations.
For each reaction complete a data table with the following information:
1. A hypothesized balanced equation, including physical states of matter.
2. Observations of the reaction and tests done to the products.
3. A correct balanced equation. Be sure to include all states of matter for each reaction.
4. The type of reaction (as categorized in Chapter 7).
Hints
-
a glowing splint is a piece of wood that has been set on fire, blown out, but is still glowing red at the end.
a flaming splint is a piece of wood that has been set on fire and is still on fire.
a glowing splint goes out in the presence of carbon dioxide
a glowing splint burns brighter in the presence of oxygen
a flaming splint pops in the presence of hydrogen
a catalyst is not a reactant nor a product, it simply helps the reaction to occur
REACTIONS
A:
Light a Bunsen burner. (methane gas = CH4)
B:
Use steel wool to clean a piece of copper wire. Use tongs to hold one end of the wire in the outer cone of a Bunsen burner
for 1 minute. Let cool and observe.
C:
Add 1-2 ml of 10% hydrogen peroxide solution to a test tube. Add 3 drops NaI solution (this substance acts as a catalyst,
not a reactant). Wait approx 20 seconds until many bubbles are being produced & then perform glowing splint test.
D:
Submerge a clean coil of copper wire into a test tube containing 5 ml of 0.10M silver nitrate solution. Dispose of
products in the waste container found in the fume hood.
E:
Add a pinch of sodium carbonate to a test tube. Add 1-2 ml of 3M hydrochloric acid to the test tube. Immediately insert
a glowing splint into the test tube.
F:
Add a small scoop of copper (II) carbonate to a test tube. While holding the test tube with a test tube holder, gently heat
the Copper (II) carbonate. While the reaction is occurring, insert a glowing splint into the test tube
G:
Place several drops of potassium nitrate on a watch glass. Add several drops of sodium acetate.
H:
Place several drops of hydrochloric acid on watch glass. Use tongs to briefly swirl solid FeS cylinder in acid.
I:
Place several drops of silver nitrate on a watch glass. Add several drops of sodium chloride.
J:
Place several drops of iron (III) sulfate on a watch glass. Add several drops of sodium hydroxide.
K:
TO BE PERFORMED BY INDTRUCTOR AS A CLASS DEMO… Add 3 ml of water to a test tube. Carefully insert
a small piece of sodium and stopper test tube. When reaction stops, perform a flaming splint test.
Determining Reactivity- For reactions L-N add a small amount of the metal into one well of a well plate. Add several drops of
3M hydrochloric acid. Caution: 3M hydrochloric acid is caustic and corrosive.
L: Copper
O:
M: Magnesium
N: Zinc
Based on reactions M-O, determine the most reactive metal. Add a small amount of the most reactive metal to a test
tube. Carefully add enough 3M HCl to cover the metal and stopper test tube. When the reaction stops, perform a flaming
splint test.