CHM 1025C/CHM 1032C Experiment#8

NAME______________________________________ DATE____________________

Determining a Mole Ratio: Hydrate Analysis Data Page

Data To Be Collected:

Chemical Formula of Hydrate:______________

(1) Mass of clean, dried crucible & cover (desktop balance): ______________g

(1a) Mass of clean dried crucible & cover (Top Loading 0.001g): ______________g

(2) Empty Crucible & Cover after first heating (Top Loader 0.001g): ______________g

(2a) Empty Crucible & Cover after first heating (Analytical 0.0001g): ______________g

(3) Empty Crucible & Cover after second heating: ______________g

Additional Heating if necessary:

(3a) Empty Crucible & Cover after third heating: ______________g

(3b) Empty Crucible & Cover after fourth heating: ______________g

(3c) Empty Crucible & Cover after fifth heating: ______________g

(4) Constant Mass of Crucible & Cover: ______________g

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(5) Mass of Hydrate, Crucible & Cover (before heating): ______________g

(5a) Mass of Hydrate: ______________(g) (Line#5-Line4)

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(6) Mass of Crucible, Cover, & Contents after 1^st heating: ______________g

(6a) Mass of Crucible, Cover, & Contents after 2^nd heating: ______________g

Additional Heating if necessary:

(6b) Mass of Crucible, Cover, & Contents after 3^rd heating: ______________g

(6c) Mass of Crucible, Cover, & Contents after 4^th heating: ______________g

(7) Constant Mass of Crucible, Cover & Anhydrate: ______________g

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Calculations:

(8) Molar Mass of Anhydrate: ______________g/mole

(9) Mass of Anhydrate (Line#7-Line4): ______________grams

(10) Moles of Anhydrate (Line#9/Line8): ______________moles

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(11) Molar Mass of Water: ______________g/mole

(12) Mass of Water (Line#5-Line7): ______________grams

(13) Moles of Water (Line#12/Line11): ______________moles

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Mole Ratio: ________ mole H₂O to 1.00 mole anhydrate (Line#13 ∕ Line10)

Formula of Hydrate: _________________________ Instructor OK: ______

Per Cent Water in Hydrate: _____________% [(Line#12/Line5a) X 100] Grade: _____(15)