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Updated: May 2, 2025
Ignite for thirty minutes over the blast lamp with the cover on the crucible, and then for periods of ten minutes, until the weight is constant. Cool in a desiccator, and weigh the crucible and residue.
The alcohol may be ignited and burned off. The electrodes are then cooled in a desiccator and weighed. The beaker containing the solution should then be raised into place from below the electrodes until the latter reach nearly to the bottom of the beaker. The support for the beaker must be so arranged that it can be easily raised or lowered.
The cover of the desiccator should be made air-tight by the use of a thin coating of vaseline.
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