Chem 30
Solubility Rules Lab
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Purpose: The purpose of the lab is to observe the rules
of solubility and to observe the formation of a
precipitate.
Materials:
1. iron(II) sulfate (All salt solutions can be made by dissolving one tablespoon of
solute in water and diluting to 100 ml)
2. sodium hydroxide
3. sodium chloride
4. magnesium sulfate
5. sodium phosphate
6. hydrochloric acid (dilute 500 ml concentrated HCl solution to 1.00 L with distilled
or deionized water)
7. iron
8. zinc
9. distilled or deionized water
10. Test tubes
11. Pipettes
Procedure:
1. Test each possible pair of solutions by combining 10 drops of each member of the pair into an
empty test tube.
2. Observe to see if a precipitate forms.
3. Record your observations into the data table.
4. Repeat for ALL pairs. Follow the data table
Chem 30
Data/Observations:
Solubility Table: Indicate in each box whether or not there was a precipitate formed. (12 marks)
Solution:
NaOH
MgSO4
FeSO4
CaCl2
Na3PO4
Na2CO3
NaOH
MgSO4
FeSO4
CaCl2
Na3PO4
Na2CO3
NaCl
For EACH reaction that formed a precipitate write out a balanced equation, indicating which
ions are aqueous and solid. Next write a net ionic equation, followed by a balanced net ionic
equation. (16 marks)
NaCl
Chem 30
Analysis:
1. Were there any reactions that formed a precipitate that was not suppose to according to the
solubility chart? Any reactions that did not form precipitates that were suppose to? (2 marks)
2. What is one factor that can affect solubility? How does it affect it? (2 marks)
3. What does the term spectator ion mean? ( 1 mark)
4. Indicate at least ONE error that could occur during this lab that would alter the results. (1 mark)