Clamps extension, fastener

Clamp the flask (around the neck) a few inches up the ringstand (Fig. 68). We are using heating mantles and you ll need the room underneath to drop the mantle in case it gets too hot. That s why the flask is clamped at the neck. Yes. That s where the flask is ALWAYS clamped, no matter what heat source, so it doesn t fall when the mantle comes down. What holds the mantle Extension ring and clamp fastener. 

Now add the condenser. Get another ringstand, extension clamp, and clamp fastener. There. Estimate the angle and height the clamp will be at... 

Do the third ringstand—extension clamp — clamp fastener setup. It s handy to think of the extension clamp and clamp fastener as a single unit. Clamp receiving flask in place. Put vacuum adapter in the flask now. Adjust. There Got it. 

OK, get a ringstand and an extension clamp and a clamp fastener and put them all together. What heat source A Bunsen burner, and you ll need more room than you do with a heating mantle (see Chapter 18, Sources of Heat ). In any case, you don t know where the receiving flask will show up, and then you might have to readjust the entire setup. Yes, you should have read the experiment before so you d know about the heating mantles. 

Get an extension clamp and clamp fastener. Open the jaws of the clamp so they re wider than the outer joint on a vacuum adapter. Set this clamp so that it can accept the outer joint of a vacuum adapter at the angle and height you made a mental note of in step 5. 

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