Melting point determination. Why take melting point? To help identify sample To help identify sample To check purity of sample To check purity of sample.

Slides:



Advertisements
Similar presentations
Using Metric Tools.
Advertisements

Measuring and Recording Dishwasher Temperatures on HACCP Records
A Portable Device for Real-time Sample Flow Measurement Jerry Dulude, Glass Expansion, Inc.
Chapter 16 Section 1 Kinetic Theory.
If you have LOTS of sample, you can determine the boiling point by distilling the sample. This provides the b.p. AND it cleans up the sample. However,
WHY SODIUM FUSIONS? Sodium reacts violently with water. Extreme caution must be exercised. WHY SODIUM FUSIONS? Organic compounds usually contain carbon,
CHEMISTRY 1105 Determination of Absolute Zero using Vernier Equipment.
Identification of an Unknown Liquid Chemistry Department Minneapolis Community & Technical College Intro to Chemistry Chem1020 Lab 1.
8 reaction lab.
Heat Loss through Window Panes ME 340 Heat Transfer Presentation Theron Mitchell and Nathan Cramer.
Vital Signs Define Various determinations that provide information about the patients basic body condition Often the first sign that there is a problem.
Water Quality Supplies Waste bottle 1413 solution pH 10 solution pH 4 solution Solution cups Water sample cup Hanna Meter.
VITAL SIGNS: T, P, R, & BP.
Packed Cell Volumes Total Proteins and Blood Films Laboratory Procedures.
RECRYSTALLIZATION, MELTING POINT, and HPLC ANALYSIS of ANALGESICS
Column Chromatography
THIN-LAYER CHROMATOGRAPHY Judith is preparing her TLC chamber, which is shown at left in the developing step #4. Scroll down for her to guide you through.
Acetylsalicylic Acid By: Jeraun Pogue Tierra Dixon Chemistry ll Mrs. Hall October 27,2008.
Recrystallization Lab # 2.
Triple Beam Balance and Graduated Cylinder. A. Triple beam balance Used to measure MASS.
Organic Chemistry Lab 315 Fall, DUE DATES Today –Notebook Pre-lab should be ready before class. –At end of lab — turn in copy of laboratory notebook.
(glass pipette, centrifuge, spectrophotometry)
Monday, September 26, This week... Monday - data sharing, fecal coliform test Tuesday - Water lecture Wednesday - Nitrate and Phosphate tests.
Lesson 3: Mass T. Trimpe 2008
Pre-Lab 10B: Determining Freezing/Melting Point
Liquid Volume Measurement Tools & Methods. Meniscus Water is adhesive… sticks to stuff. It “climbs” the glass. The curve formed is the meniscus. We Read.
We can all tell what is hot and what is cold. We use our sense of touch to tell us if things are hot or cold. We can feel what is hot and what is cold.
Melting Points and Mixed Melting Points
RECRYSTALLIZATION, MELTING POINT, and HPLC ANALYSIS of ANALGESICS
Melting Points and Mixed Melting Points
INV. 6 (PART 3) CONDENSATION AND DEW POINT. REVIEW HOW DO YOU KNOW THAT THERE IS WATER VAPOR IN THE AIR? HOW DO YOU KNOW THAT THERE IS WATER VAPOR IN.
Experimental Procedure
Pre-Lab 10A: Pure Substance or Mixture
Cardiochek PA Brief Guide Liz Corrigan Office of Public Health.
DQ#4 What 4 things can occur when water vapor condenses? I do not mean any form of precipitation.
LecturePLUS Timberlake1 Chapter 6 Energy and States of Matter Heating and Cooling Curves From: PPT%20Energy/Heating%20Curves.ppt.
Spectrophotometry Ability of molecules to absorb and transmit light energy is the basis of one of the most widely used procedures for determining the concentration.
NMR loading procedure. load button needs to be held to continually supply air to the sample chamber If the air is not on the sample will drop.
Week -4 L 1 Presentation LIQUID - IN - GLASS THERMOMETERS
Title; To determine the purity of benzoic acid crystals by melting point determination.
Which color absorbs the most heat? I think the dark blue cup will absorb the most heat.
Chapter Describing Weather Pages
Weather Instruments.
Day 29 Investigation 6 part 3 Condensation & Dew Point.
1. Copy the table below onto your warm-up.
Using Quickbooks to Record Business Transactions.
Chapter Describing Weather Pages Weather The short-term (minutes/days) atmospheric condition of a specific place at a specific time Studied.
Investigating Non-Ohmic Resistors Learning Outcome Set up the circuits in order to calculate or directly measure the resistance of variable resistors.
Triple Beam Balance and Graduated Cylinder. A. Triple beam balance Used to measure MASS.
1. Swab throat. 5. Read Results Positive = 2 lines. Strep A Rapid Test Strip Procedure For details, consult Lab Manual located at: P:\Clinical\Lab Manual.
Calibration of a Thermistor Voltage Divider Portland State University Department of Mechanical Engineering ME 121: Engineering Problem Solving.
RECRYSTALLIZATION, MELTING POINT, and HPLC ANALYSIS of ANALGESICS
Organic Chemistry Lab 315 Fall, 2016 Please see the Bb announcement concerning your assigned bench in the laboratory.
Identification of Substances by Physical Properties.
Unit 11: Calibrating Instruments
Melting Point Dr. Zerong Wang at UHCL.
Preparation of Chemical Compound in Laboratory Scale
Thermometers This also has a Hygrometer, which measures humidity.
Measurement and Lab Equipment
Bell Ringer What is the temperature danger zone?
Chapter 3 Melting points and Boiling points
Heating and cooling cure of water
Identifying if a sample is an aldehyde or a ketone
Melting Point Determination
Determination of Absolute Zero using Vernier Equipment
Phase Change.
GENERAL PROCEDURE Apparatus
NMR loading procedure Note location of the Sample Chamber, Air line (sample retriever/load button). and Depth gage.
Measuring temperature
Experimenters: Billy Bob, Suzy Q, Jimmy Joe
Presentation transcript:

Melting point determination

Why take melting point? To help identify sample To help identify sample To check purity of sample To check purity of sample

Filling sample holder dip the open end of the capillary into dry, powdered sample several times, shoving more in each time

Packing the sample drop the capillary (closed end down) through a long glass tube several times until sample is compacted at the bottom

Turn machine on, and set resistor for temp range ON button indicated by white arrow. Set dial to expected melting range

How to determine the right setting This chart shows heating curves at various settings. For accurate m.p. determination the expected m.p. is on the flat part of the curve

Taking m.p. Turn on the digital thermometer

Taking m.p. insert up to 3 samples

Wait for and watch samples melt. Record melting range

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.