In dehydrating a a hydrate, why did the crucible have to be covered at all during all heatings .?

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why did the crucible have to be covered during cooling

Atmospheric water vapor.

2007-10-27 14:13:23 · answer #1 · answered by Now and Then Comes a Thought 6 · 0⤊ 1⤋

So that no moisture from the air could get into the sample and create inaccurate results.

2007-10-27 15:00:28 · answer #2 · answered by Lady Geologist 7 · 0⤊ 0⤋

it'll suck water back in out of the air (the reaction wll reverse on cooling).

2007-10-27 16:06:13 · answer #3 · answered by busterwasmycat 7 · 0⤊ 0⤋