6.3 Sublimation .docx - Expt 6.3 Sublimation of an Unknown and Identification by Melting Point I Abstract Christina McCool CHE210L Lab Section 13

6.3 Sublimation .docx - Expt 6.3 Sublimation of an Unknown...

This preview shows page 1 - 3 out of 3 pages.

I. Abstract Expt. 6.3 Sublimation of an Unknown and Identification by Melting Point Christina McCool CHE210L Lab Section 13 October 4, 2018
Image of page 1

Subscribe to view the full document.

The purpose of this lab was to use sublimation; a useful purification technique, to identity an unknown using melting point. Unknown # 97 was identified as salicylic acid. II. Introduction 1. Define and explain the process of sublimation. Identify the physical changes involved in the sublimation of a sample and explain when and why chemists use it. If the pressure is low enough, a substance can exist in a solid, liquid, and gas state. Below this point, a substance is likely to sublime, in which it passes through the phase of turning a liquid and changes from a solid to a gas. The intermolecular forces between the molecules break apart, allowing them to spread out far enough for the substance to take on the characteristics of a gas. In the lab, sublimation happens when the substance heats on a warm surface and then condenses on a cold surface. Sublimation is often used to purify substances because there is less
Image of page 2
Image of page 3
  • Fall '12
  • T.Reitz

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

Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes