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Unformatted text preview: stay constant. This means if we were to heat up the hydrate in a closed container and let the water vapor accumulate inside the container the total mass would not change. This also means that the mass lost during the heating process was that of water. So we know how much water was in the hydrate and using this we can find what the substance was. While in theory this should work perfectly, there is plenty of room for error. The scale could be miscalibrated, the heating process could be too short, or the hydrate could have decomposed. Ignoring that these errors might have come into play, my group found that our hydrate was CaSO4. Our anhydrate to hydrate ratio was 0.836 which means that the hydrate lost 16.4% water. CaSO4 has a ratio of .7909, the closest to our ratio. I am not very confident in these results because the ratio for CuCl2 is very close to that of CaSO4, and our results are about 4% off from the actual mass ratio....
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This note was uploaded on 09/07/2010 for the course CHEM 1310 taught by Professor Cox during the Fall '08 term at Georgia Tech.
- Fall '08