Adjust
the position of the thermometer such that the TOP of the mercury
bulb
is even with the armpitSimple Distillation: Positioning the Thermometer
Adjust
the position of the thermometer such that the TOP of the mercury
bulb
is even with the armpit
The thermometer must be properly positioned within the three-way adapter to obtain accurate temperature readings during the distillation. It is best to remove the thermometer and adapter as a unit from the three-way adapter and to use a small amount of glycerin to lubricate the thermometer when making small changes.
Two examples of incorrectly positioned thermometers :
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