Drying with Anhydrous Sodium Sulfate


This technique video demonstrates drying an
organic liquid with anhydrous sodium sulfate. Anhydrous sodium Sulfate is typically used
to remove water from an organic material. Sodium sulfate is typically in a powder form. Take a scoop of anhydrous sodium sulfate and
place it into the Erlenmeyer flask. A small scoop is usually enough for a small
amount of liquid. If you use too much sodium sulfate it will be
difficult to separate from your organic solution. Almost instantaneously, the sodium
sulfate will start absorbing the water. Gently stir the Erlenmeyer flask using a circular
motion to make sure all the water is absorbed. When the sodium sulfate swirls freely
in the flask, the solution is water-free. You will notice the sodium sulfate will
aggregate to the bottom of the glass. The sodium sulfate will stick mostly to the glass,
and form clumps, making it easy to separate. Now take a clean beaker and pour
the dry liquid into it carefully. You will notice that the majority of the
sodium sulfate will stay at the bottom. Do not let the sodium sulfate be
transferred to the clean beaker. If needed, you can use a glass funnel with filter paper
to separate the sodium sulfate from the mixture.

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