Preparation of Sols
To start the experiment do the following:
- Prepare about 20 mL of a concentrated FeCl3.6H2O solution (by dissolving it in about three times its volume of deionized water).
- Take a 1 L conical flask (by clicking on it) and pour about 500 mL of deionized water in the flask.
- Place the beaker on a magnetic stirrer-cum-heater.
- Set the heater temperature to 100°C (by clicking on the Heater knob).
- Place a magnetic bar into the flask and set the stirrer to a medium speed.
- When the water in the flask starts boiling, turn off the heater.
- Use a dropper to add some of the original concentrated FeCl3.6H2O solution to the hot water, a few drops at a time. Note down your observation. Then one has to switch off the stirrer.
- Take rest of the solution in the beaker and apply heat on it until it boils. Note down your observation.
- Add a few mL of FeCl3.6H2O solution to the above beaker and stir it. Note down your observation.
- Filter the solutions first using filter paper and then cellophane. Note down your observation.