composition of hydrates - Abbey Blair Period 5 Composition...

Info icon This preview shows pages 1–2. Sign up to view the full content.

Abbey Blair 12/30/15 Period 5 Composition of Hydrates Safety: In this lab we wore goggles as we used a Bunsen burner and two hazardous chemicals. The chemicals used were copper (II) sulfate and cobalt (II) chloride. Copper (II) sulfate is a skin and respiratory irritant and is moderately toxic by ingestion or inhalation. Cobalt (II) chloride is a possible carcinogen as fume or dust and is moderately toxic by ingestion and causes blood damage. Procedure: Page 28 UNKNOWN LETTER: B Observations and Data: Mass of evaporating dish: 48.28g Mass of evaporating dish + hydrate: 51.37g Mass of evaporating dish + anhydrous salt: 49.25g Calculations: Calculate the mass of the hydrate used: 51.37 – 48.28 = 3.9g Calculate the mass of the water lost: 51.37 – 49.25 = 2.12g Calculate the percent of the water in the hydrate: 2.12/3.9x100 = 54.4% Questions:
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1. Unknown : B →Cobalt Choride 2. 54.4 – 45.44/45.44x100 = 19.72% 3. Didn’t share with a group 4. The evapora±ng dish must be cooled before measuring the mass because the heat may make it less dense and not get an accurate weight. 5. So no water from the air is absorbed. 6. Deliquescent: Tending to absorb from the air and dissolve in it EForescent: Spontaneous loss of water by a hydrated salt Hygroscopic: The ability of a substance to a²ract and hold water molecules from the surrounding environment. 7. Hydrates are prepared from the anhydrous form of the substance by adding water Conclusion: In this lab we heated an unknown substance and determined the mass of the substance and calculated the percent of the water lost. This lab furthered my understanding of the composi±on of hydrates....
View Full Document

  • Fall '13
  • DeWolfe
  • Water of crystallization, Abbey Blair, 2.12g, 3.9g

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern