{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chem 2 Scheme 2 - SCHEME 2 Ions being tested for Na K NH4...

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

View Full Document Right Arrow Icon
SCHEME 2 Ions being tested for: Na+, K+, NH4+, Cl-, SO4 2-, HXO4 2-, NO3-, OH- IDescribe sample in terms of phase, color, odor, shape (if crystalline structure), does it appear to be a mixture? IIFlame Test: Heat wire loop, then dip in concentrated (16M) HONO2 solution, then rinse with deionized water, then reheat loop to check flame color, and continue until wire no longer colors flame. At this point, dip the loop in water, and then in your unknown substance. Place the loop containing the unknown in the flame. IIIIf the flame turns bright yellow(orange), the unknown contains Na+, and possibly K+ and NH4+. IVIf the flame turns purple, the substance contains K+, and possibly NH4, but not Na+ VIf the flame does not change color, the substance cannot contain K+ or Na+, but may contain NH4+. VITest for NH4+/Litmus Test VIIAdd solution of (1-6M) NaOH to the unknown solid. VIIISuspend damp (with deionized water) red litmus paper over the solution. If NH4+ is present, the reaction with OH- will produce NH3 gas, which will turn the litmus paper blue.
Image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
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