How much water is in the hydrate?
Brianna Baenke
Aribeth Reyes-Arroyo
Mina Soliman
Benjamin Barnett
CHM 113
Trevor Smith
Wednesday 8:30 A.M.
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https://www.coursehero.com/file/25863981/How-much-water-is-in-the-hydrate-Lab-CHM13-LABdocx/
, Introduction:
Part 1
The purpose of this lab was to confirm the mass percent of a given hydrate. Also to
confirm the empirical formula with the known formula. An empirical formula is the simplest
ratio of the atoms in a molecule (Empirical Formula 2). The water lost was calculated to show
how accurate the procedure was to the known hydrate given.
Part 2
The purpose of this lab is to find the mass percent of water in an unknown hydrate. The
mol ratio was also used to determine the empirical formula of an unknown substance. A hydrate
is a salt that utilizes water in its structure. In the lab the hydrate was heated up to find the water
lost, the remaining residue was known as the anhydrous. Calculating the water lost and
comparing it to the knowns that were given will tell which hydrate was used. Percent error will
play a factor in how accurate the measurements are.
Procedure:
Part 1
We began by obtaining a crucible and massing it over an electronic scale. We then filled
the crucible with 1.175 grams of copper sulfate with a scoop, weighed it, subtracted the mass of
the empty crucible from it, and recorded the result. Afterwards, for the first cycle, the crucible
and its lid were placed on a heating plate at its highest temperature for 15 minutes. After the first
10 minute heating period, it was heated with the lid half off. Following that, the crucible was
then cooled for another 10 minutes and its mass documented. For cycle two, this process was
repeated. Afterwards, the crucible was then weighed, and its final mass was subtracted from its
original hydrated mass to determine the percent of its mass that is H2O. We simultaneously did
This study source was downloaded by 100000860007226 from CourseHero.com on 02-08-2023 00:00:23 GMT -06:00
https://www.coursehero.com/file/25863981/How-much-water-is-in-the-hydrate-Lab-CHM13-LABdocx/
Brianna Baenke
Aribeth Reyes-Arroyo
Mina Soliman
Benjamin Barnett
CHM 113
Trevor Smith
Wednesday 8:30 A.M.
This study source was downloaded by 100000860007226 from CourseHero.com on 02-08-2023 00:00:23 GMT -06:00
https://www.coursehero.com/file/25863981/How-much-water-is-in-the-hydrate-Lab-CHM13-LABdocx/
, Introduction:
Part 1
The purpose of this lab was to confirm the mass percent of a given hydrate. Also to
confirm the empirical formula with the known formula. An empirical formula is the simplest
ratio of the atoms in a molecule (Empirical Formula 2). The water lost was calculated to show
how accurate the procedure was to the known hydrate given.
Part 2
The purpose of this lab is to find the mass percent of water in an unknown hydrate. The
mol ratio was also used to determine the empirical formula of an unknown substance. A hydrate
is a salt that utilizes water in its structure. In the lab the hydrate was heated up to find the water
lost, the remaining residue was known as the anhydrous. Calculating the water lost and
comparing it to the knowns that were given will tell which hydrate was used. Percent error will
play a factor in how accurate the measurements are.
Procedure:
Part 1
We began by obtaining a crucible and massing it over an electronic scale. We then filled
the crucible with 1.175 grams of copper sulfate with a scoop, weighed it, subtracted the mass of
the empty crucible from it, and recorded the result. Afterwards, for the first cycle, the crucible
and its lid were placed on a heating plate at its highest temperature for 15 minutes. After the first
10 minute heating period, it was heated with the lid half off. Following that, the crucible was
then cooled for another 10 minutes and its mass documented. For cycle two, this process was
repeated. Afterwards, the crucible was then weighed, and its final mass was subtracted from its
original hydrated mass to determine the percent of its mass that is H2O. We simultaneously did
This study source was downloaded by 100000860007226 from CourseHero.com on 02-08-2023 00:00:23 GMT -06:00
https://www.coursehero.com/file/25863981/How-much-water-is-in-the-hydrate-Lab-CHM13-LABdocx/
