1.) A student was asked to identify an unknown hydrate by following the procedure described in this module. After heating and cooling, a 2.752 gram sample of this unknown weighed 1.941 grams. Students were given a list of possible compounds from which to identify their unknowns: LINO3 3H20, Ca(NO,)2•4H20, and Sr(NO3)2•4H20. a.) Calculate the percent water in the student's unknown. b.) Could the unknown possibly have been Sr(NO)2•4H,0? Briefly explain. Show work. c.) What is the probable identify of the student's unknown? d.) Based o the student's results and your answer to c., what is the most probable source of error in the experiment?

1.) A student was asked to identify an unknown hydrate by following the procedure described in this module. After heating and cooling, a 2.752 gram sample of this unknown weighed 1.941 grams. Students were given a list of possible compounds from which to identify their unknowns: LINO3 3H20, Ca(NO,)2•4H20, and Sr(NO3)2•4H20. a.) Calculate the percent water in the student's unknown. b.) Could the unknown possibly have been Sr(NO)2•4H,0? Briefly explain. Show work. c.) What is the probable identify of the student's unknown? d.) Based o the student's results and your answer to c., what is the most probable source of error in the experiment?

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter13: The Chemistry Of Solutes And Solutions

Section13.7: Colligative Properties Of Solutions

Problem 13.16E: Suppose that you are closing a cabin in the north woods for the winter and you do not want the water...

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