{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chemistry Rationale Group 4

Chemistry Rationale Group 4 - Sharron K Smith Chemistry...

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

View Full Document Right Arrow Icon
Sharron K. Smith Chemistry 1021L-15 Dr. MaGee Group 4 Unknown Rationale March 27, 2008 Ions Present : Ba 2+ (aq) , Ca 2+ (aq ) Ions Absent : Mg 2+ (aq) To an unknown solution 6 M NH 3 and 1 M (NH 4 ) 2 CO 3 were added and a white precipitate was observed. This solid contains BaCO 3 ; it is insoluble according to the carbonate solubility rule. 6 M CH 3 COOH and 1 M NH 4 CH 3 COO were added to this white precipitate and a colorless solution was observed. The colorless solution contains Ba 2+ (aq) because the CH 3 COOH (aq) caused the BaCO 3(s) to go back into solution. 1 M K 2 CrO 4 was added to the colorless solution and a yellow precipitate was observed. This yellow precipitate is evidence that BaCrO 4(s) was formed, indicating the presence of Ba 2+ (aq) . The solid was washed with 6 M HNO 3 and 6 M HCl and then dissolved in water. A flame test was performed on the solution and a green flame was produced, confirming the presence of Ba 2+ (aq) .
Image of page 1
This is the end of the preview. Sign up to access the rest of the 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