Reactions Between Ions in Aqueous Solutions
To provide opportunities to develop hypotheses; test those hypotheses and analyze resulting
To practice use of solubility rules.
To practice writing net ionic equations.
Three sets of six solutions in pipettes
A 24-well plate
PRELAB QUEST IONS______________________________________________________________
Look at the names of compounds in one of the three sets below. Using solubility rules, page 410, table
11-1, predict the combinations within that set that should provide an insoluble pr oduct, a precipitate
(ppt.). Write a Complete Balanced Equation for all the combinations.
Design a method in your notebook for testing your hypotheses (predictions) giving as much detail as
possible. Perform the steps of your method making observation as you do so.
Set 1 Set 2 Set 3
Nickel II chloride Barium nitrate Iron III chloride
Potassium chromate Sodium hydroxide
Barium hydroxide Aluminum chloride Barium nitrate
Sodium carbonate Sodium carbonate Sodium phosphate
ANALYS IS AND CONCLUS ION
Answer the following questions using your observations/data table:
1. Were all of your predictions correct? If not, w hy not?
2. Did all ppt’s form immediately or did some take time to form? Which ones?
3. What do all the colored ppt’s have in common?
4. Why do you suppose many of the starting compounds contained group I metal ions with a normally
5. In each case where a ppt. occurred identify the spectator ions present.
6. Write a net ionic equation for the formation of each ppt. If the same ppt. occurs more than once, you
only have to write one net equation.