Reactions Between Ions in Aqueous Solutions by gmj10717


									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 QUESTIONS______________________________________________________________

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 product, 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

Sodium sulfate
                              Potassium chromate          Sodium hydroxide

Barium hydroxide              Aluminum chloride           Barium nitrate

Sodium carbonate              Sodium carbonate            Sodium phosphate


Answer the following questions using your observations/data table:
1. Were all of your predictions correct? If not, why 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
   insoluble anion?
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.

To top