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Unformatted text preview: 1. Unknown : B →Cobalt Choride 2. 54.4 – 45.44/45.44x100 = 19.72% 3. Didn’t share with a group 4. The evapora±ng dish must be cooled before measuring the mass because the heat may make it less dense and not get an accurate weight. 5. So no water from the air is absorbed. 6. Deliquescent: Tending to absorb from the air and dissolve in it EForescent: Spontaneous loss of water by a hydrated salt Hygroscopic: The ability of a substance to a²ract and hold water molecules from the surrounding environment. 7. Hydrates are prepared from the anhydrous form of the substance by adding water Conclusion: In this lab we heated an unknown substance and determined the mass of the substance and calculated the percent of the water lost. This lab furthered my understanding of the composi±on of hydrates....
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- Fall '13
- Water of crystallization, Abbey Blair, 2.12g, 3.9g