CHM2046 Unknown #2 - CHM2046 Scheme of analysis Unknown#2...

Info icon This preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
CHM2046 Scheme of analysis Unknown #2 Brian Rojas 6/25/2010
Image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
*When given the unknown sample: - Describe s a mple: Phas e, solubility, color, odor, sh ap e - Weight s a mple. - Divide s a m ple in two e qu al p arts - Mix ½ of th e unknown s a m ple with 10 mL of D.i. water (pH = 7.0) to m ake a n unknown solution. pH Test - Always b egin testing with BtB (Bromothynol Blue) indicator to d eter mine if unknown is acid or b as e. - If unknown’s pH is > 7 unknow is a b as e, a nd we should proce e d to test with tb(Thymol Blue) indicator. - If unknown’s pH is < 7 unknown is acid, a nd we should proce ed to test with AY (Alizarine Yellow) indicator. pH Present pH Present 2-3 Al³ 1-2 HSO¯ /SO ² ¯ 4-6 NH ₄⁺ 8-10 HCO ¯ 6 Mg² 11-14 CO ²¯/OH¯ 6-7 Na 7 Ca² /Ka Flame Test
Image of page 3

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

View Full Document Right Arrow Icon
*For this experiment we will use Nichrome® wire, bit before we can use it we must clean it to make sure there are no contaminants that can interfere with our data.
Image of page 4
Image of page 5
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