Solubility of a Salt
...ure: 1. Fill a 400-ml beaker two-thirds full of water. 2. Use a ring clamp and wire gauze to support the beaker. 3. Heat the water to boiling with a Bunsen burner. 4. Measure 10.0 grams of potassium nitrate and place in a large test tube. 5. Measure exactly 7 ml of water and pour it into the test tube. 6. Lower the test tube into the boiling water and clamp to pole using a test tube clamp. 7. Insert a thermometer into the test tube and stir gently until the solid has dissolved completely. 8. Remove the Bunsen burner and raise the clamp so that the beaker of water is below the test tube. 9. To prevent supersaturating, stir the solution as it cools with the thermometer. 10. When the first trace of crystals appear in the test tube, the solution is saturated. Record the temperature. 11. Pour exactly 3 ml of water in the test tube, lower into the hot water and stir until the salt is again completely in solution. 12. Raise steps 11 and 12 fo...