# The determination of the percent water in a compound DATA TABLE Compound selected for analysis hydrole...

###### Question:

the determination of the percent water in a compound
DATA TABLE Compound selected for analysis hydrole of Cusoa Mass of crucible and cover (9) 38,75 Mass of crucible, cover, and hydrated sample (g) 39.95 Mass of hydrated sample (g) Mass of crucible, cover, and dehydrated sample-1" weighing (9) 39,48 Mass of crucible, cover, and dehydrated sample - 2nd weighing (g) 39,44 Mass of crucible, cover, and dehydrated sample - 3rd weighing (9) Mass of crucible, cover, and dehydrated sample - 4th weighing (9) Mass of dehydrated sample (g) Mass of water evolved (9)
DATA ANALYSIS 1. How many moles of water were in your sample? 2. How many moles of ionic compound were in the dehydrated sample? 3. What is the proper chemical formula and name for the hydrated compound that you tested? Make sure you include the ratio of water to nonwater portions of the hydrated compound. 4. Explain how you determined the water of hydration for your chemical formula. (Hint:Show the calculations) 5. If you had not heated the sample long enough to remove all the water of hydration how would your subsequent calculations have been affected? 6. Discuss a minimum of 3 sources of uncertainty for this experiment.

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