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,. 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?