Melting and Boiling Point.docx - Melting and Boiling Point...

Info icon This preview shows pages 1–3. Sign up to view the full content.

Melting and Boiling Point Objective: The goal of this experiment is to measure the melting and boiling point of compounds and to determine the purity of compounds. Pre-Lab questions: Pre-Lab questions were revised and hand in. Introduction: The melting point is defined as the temperature at which solid and liquid states coexist. If the solid is pure, it has a sharp melting point. Impurities will lower than melting points relative to accepted value and increase the melting point range. Usually, the melting point range of pure substance between the final droplet and the first droplet is less than 4 . The boiling point is defined as the temperature at which liquid and gas states coexist. The impurities will raise the boiling point relative to accepted value. The melting point and boiling point are usually used ti figure out whether a compound is pure or not. List of equipment: Capillary tubes; Temperature probes; Hot plate; Digital interface; melting point apparatus; Ring stand; Test tube; Breaker; Water; Clamp(utility); Boiling chips; Ethanol; P-dichlorobenzene; Acetone; Ethanol; Weighting papers; Two-hole corks; Spatula; Hallow glass tube.
Image of page 1

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

Procedure and observations: Part A. Melting Point Determination A tiny size of p-dichlorobenzene was presented on a piece of paper. The crystals were
Image of page 2
Image of page 3
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