1. The problem statement, all variables and given/known data The crucible is handled with oily fingers after its mass measurement but before the ~3 gram sample of the hydrated salt is measured. Subsequently(after measuring the hydrated salt,the oil is burned off. How does this technique error affect the reported % water in the hydrated salt. Explain 3. The attempt at a solution The measurement of the crucible will be accurate, but after touching the crucible with the oily fingers, it will contaminate the surface of the crucible. After weighing the hydrated surface and then burning the crucible, it will seem that more water was lost because the oily fingers would have increased the mass of the hydrated salt. I'm kind of having second thoughts on my answer....part of my mind thinks it will no be affected? HELP!