Title: Investigating the Properties of Ionic Compounds
Objective: To explore the properties of ionic compounds and understand their behavior in different conditions.
Materials: - Sodium chloride (NaCl) - Calcium chloride (CaCl2) - Copper (II) sulfate (CuSO4) - Distilled water - Test tubes - Test tube rack - Bunsen burner - Heat-resistant mat - Safety goggles - Stirring rod - Dropper - Litmus paper (red and blue) - Conductivity tester
Procedure:
Part 1: Solubility of Ionic Compounds
- Label three test tubes as A, B, and C.
- Add 2 mL of distilled water to test tube A, 2 mL of 0.1 M NaCl solution to test tube B, and 2 mL of 0.1 M CaCl2 solution to test tube C.
- Stir each solution with a stirring rod and observe the solubility of each compound.
- Record your observations in a table.
| Compound | Solubility in Water |
|---|---|
| NaCl | |
| CaCl2 | |
| CuSO4 |
Part 2: Conductivity of Ionic Compounds
- Label three test tubes as D, E, and F.
- Add 2 mL of distilled water to test tube D, 2 mL of 0.1 M NaCl solution to test tube E, and 2 mL of 0.1 M CuSO4 solution to test tube F.
- Dip the conductivity tester into each solution and record the conductivity of each compound.
- Record your observations in a table.
| Compound | Conductivity in Water |
|---|---|
| NaCl | |
| CuSO4 |
Part 3: pH of Ionic Compounds
- Label three test tubes as G, H, and I.
- Add 2 mL of distilled water to test tube G, 2 mL of 0.1 M NaCl solution to test tube H, and 2 mL of 0.1 M CuSO4 solution to test tube I.
- Dip a piece of red litmus paper into each solution and observe the color change.
- Dip a piece of blue litmus paper into each solution and observe the color change.
- Record your observations in a table.
| Compound | Red Litmus | Blue Litmus |
|---|---|---|
| NaCl | ||
| CuSO4 |
Part 4: Flame Test of Ionic Compounds
- Label three test tubes as J, K, and L.
- Add a small amount of NaCl to test tube J, CaCl2 to test tube K, and CuSO4 to test tube L.
- Heat each test tube over a Bunsen burner flame until the compound melts and the flame turns a characteristic color.
- Observe the color of the flame and record your observations in a table.
| Compound | Flame Color |
|---|---|
| NaCl | |
| CaCl2 | |
| CuSO4 |
Conclusion:
- Based on your observations, which compound was the most soluble in water?
- Which compound had the highest conductivity in water?
- Which compound was acidic in nature?
- Which compound produced a green flame during the flame test?
- What can you conclude about the properties of ionic compounds based on this lab?
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