1 . Take a ring support for the separators funnel and attach it to the lab stand. Place the

separators funnel in it as shown in figure 1. Make sure that the stopcock is closed

(horizontal position). Pour in 20ml of Sudan IV solution. Record your observations.

2. Add 10ml of hexane to the mixture in separators funnel. Record your observations.

3. Put the stopper in the top of the funnel securely. Securely hold the funnel and invert it a

few times as shown in fig. 2. With the stopcock pointing UP and away from everyone,

carefully open it (the handle should be parallel with funnel.) to release any pressure. IF

THIS IS UNCLEAR ASK YOUR INSTUCTOR OR LAB STAFF BEFORE ATTEMPTING IT.

There will probably be a gentle hiss of escaping gas. CLOSE THE VALVE. GENTLY swirl

the mixture with the funnel still inverted and VENT again. Repeat process until no more

gas is released.

4. Place the funnel in the support ring. Wait until the two liquids separate. If the interface

between the two liquids isn't sharply defined, it means that the system (liquids; solute;

impurities) is prone to form an emulsion, droplets of one liquid trapped in the other as in

salad dressing. Shake the two liquids together as vigorously as possible without forming

an emulsion. Record your observations.

5. Let the mixture rest in the support ring, until the liquids separate.