Experiment #04 Identification of Alum

Experiment #04 Identification of Alum - 0.05206 mol Ratio...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Experiment 4 Part 1: Finding the Melting Point of Alum Constants: Experimental MP of Alum 92.1 MW of Anhydrous Alum 258.2 g/mol Theoretical MP of Alum 95.0 MW of Water 18.0 g/mol Percent Error 3.05 % 233.4 g/mol 96.06 g/mol MW of Alum (hydrated) 474.2 g/mol 0.2 M Part 2: Determine the Amount of Water of Hydration in Alum Crystals Mass Crucible + Cover 15.371 Mass Crucible,Cover, + Alum 17.415 Mass of Alum Used 2.044 g Mass Crucible,Cover, + Alum after heating 16.478 g Mass of Alum after heating 1.107 g Mass of Water Driven Off 0.937 g Moles of Anhydrous Alum 0.00429 mol Moles of Water Driven Off
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 0.05206 mol Ratio of Water to Alum moles 0.05206 0.00429 Ratio of Water to Alum (Adjusted) 12.1 1 Experimental Error 1.18 % Part 3: Determine the Percent Sulfate in Alum Mass of Alum Used 1.062 g 44.79 ml 45 ml Mass of Gooch Crucible 31.548 g 32.586 g 1.038 g Percentage of Sulfate in Alum 40.23 % % Error (actual = 40.53%) 0.75 % Identification of Alum, KAl(S0 4 ) 2 . 12H 2 o C o C MW of BaSO 4 MW of SO 4 = [Ba(NO 3 ) 2 ] used Volume of Ba(NO 3 ) 2 Needed Volume of Ba(NO 3 ) 2 Used Mass of Crucible + BaSO 4 Mass of BaSO 4...
View Full Document

{[ 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