The percentage of water in an unknown hydrated salt is to bedetermined by weighing a sample of the salt, heating it to driveoff water, cooling it to room temperature, and re-weighing. Whichprocedural mistake would result in determining a percentage ofwater that is too low?
Procedural Mistakes
I. heating the sample in aclosed, rather than an open, container
II. re-weighing thesample before it has cooled to room temperature
A. I only
B. II only
C. both I andII
D. neither I norII
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