Lab: Formation of Precipitates
Purpose: To observe double replacement reactions, identify precipitates, and write net ionic equations
Procedure:



Add one or two drops of each solution to the correct circle on the template.
Observe the precipitate that is formed. Record your observations in the data table below.
When you’re finished, clean the template with a paper towel.
Data Tables
Potassium Iodide
Sodium Sulfide
Potassium Chromate
Sodium Carbonate
Silver
Nitrate
A)
B)
C)
D)
Iron (III)
Nitrate
E)
F)
G)
H)
Lead (II)
Nitrate
I)
J)
K)
L)
Post Lab Questions:
1)
2)
3)
4)
What is a double replacement reaction?
What is a precipitate?
What is the difference between an ionic compound that is soluble and an ionic compound that is insoluble?
For each of the above reactions (A through L):
a. Write the balanced chemical equation.
b. Write the complete ionic equation. Circle the spectator ions.
c. Write the balanced net ionic equation.
d. Identify the formula and name of the precipitate.
So you may want to set it up like this:
Reaction A)
a) Balanced Equation:
b) Complete Ionic Equation:
c) Net Ionic Equation:
d) Formula and name of precipitate:
Reaction B)
a)
b)
c)
d)
And continue through Reaction L.
NO CONCLUSION REQUIRED.