Lecture 3 Chapter 5: Extraction Lecture Problem 1 Due Thursday

Slides:

Advertisements

Similar presentations

Isolation of Caffeine From “Mountain DewTM” or “Coca-ColaTM” Syrup

Advertisements

Organic Chemistry Lab 315 Fall, 2014

 Caffeine  Alkaloid  Purine Ring System  Stimulant (50 – 200 mg)  Diuretic.

CH 3: Stoichiometry Moles.

Organic Chemistry Lab 315 Fall, DUE DATES Today –At beginning of lab -- Melting Pt. and Ref. Index Report –At end of lab -- copy of laboratory notebook.

GRAVIMETRIC ANALYSIS : CALCIUM CARBONATE IN TEXAS LIMESTONE

Isolation of Caffeine Overview

Preparation of Acetaminophen

Today: 1) Infrared Spectroscopy (IR) 2) Introduction to Exp. 10: Caffeine from Tea Leaves.

Parts of slideshow courtesy of Adam Hall, Instructor of Forensic Sciences, Boston University.

Extraction Lab # 6.

Today: Conclusion of Distillation/GC Introduction to Exp

1 Lecture 7 Ch 6: Distillation & Boiling Points This Week In Lab: Ch 5: Extraction, Procedure 2 Ch 4 Final Report Due Next Week in Lab: Ch 6 PreLab due.

Extractions Mixture of benzoic acid, anthracene, and p-nitroaniline.

Friedel-Crafts Alkylation

Exercise F2 Recrystallization and Vacuum Filtration Organic Chemistry Lab I Fall 2009 Dr. Milkevitch September 21 & 23, 2009.

Recrystallization Impure benzoic acid

The Aldol Condensation Puzzle

EXTRACTION of ANALGESICS

Synthesis of tert-BuCl CHEM 315 Week of November 8 th, 2010 Alexis Patanarut.

AL CHEM REVIEW ORGANIC CHEMISTRY. AL CHEM Written Practical [Organic Chemistry] p.1 ~ Organic Synthesis ~ Organic Acid separate How to separate the product.

Organic solvent extraction

RECRYSTALLIZATION.

Solid-vapor equilibrium (SVE) and Solid-liquid equilibrium (SLE)

WWU -- Chemistry Experiment 12 ISOLATION OF CAFFEINE FROM TEA OR COFFEE Reading Assignment –pp. 87 – 99 –Technique 12, pp. 669 – 693 –Green Lab: Not available.

WWU -- Chemistry Experiment 11 ISOLATION OF CAFFEINE FROM TEA Reading Assignment –pp. 119 – 127 –Technique 7, pp. 595 – 613 –Green Lab people: download.

Today: Wrap up Exp. 1: “Melting Points” Introduction to Exp. 2: “Recrystallization” (2 Lab periods) In Lab: Today: 2ab. Next week: 2c and completion of.

Today: Exp.9, “Separation and Identification of an Unknown Mixture” (3 lab periods) “Qualitative analysis” This experiment includes: liquid/liquid.

Synthesize t-Butyl (or t-Pentyl) Chloride

Organic Chemistry Lab 315 Fall, 2014.

Close your books and take out a piece of paper. Give an example of each of the following. 1)Element that exist as a solid at room temperature (298.15K)

Lecture 4 Thioacidolysis and Derivatization Followed by Reductive Cleavage.

Principles of Extraction S Separatory Funnel Separation of immiscible liquids 2.

Organic Chemistry Lab II, Fall 2009

Recrystallization & Melting Point

Solubility and Extraction Summer Separatory Funnel Separation of immiscible liquids.

Organic Chemistry Lab 318 Spring, DUE DATES Today –At end of lab -- copy of laboratory notebook pages for today's experiment Next Week –At beginning.

General Laboratory Tools Techniques and Methods Browse through these files to get familiar with equipment, techniques and general approaches to use in.

Chemistry 2412L Grignard Reaction Pre-lab lecture.

Chem. 1B – 9/17 Lecture Updated Announcements I page to list exam date as 10/1.

EXTRACTION - a separation technique. Extraction Transferring a solute from one solvent to another Solvents must be immiscible – usually one is water an.

Lecture 12 Chromatography Introduction Ch 7: Thin-Layer Chromatography Lecture Problem 4 Due This Week In Lab: Ch 6: Procedures 2 & 3 Due: Ch 5 Final Report.

Weekly Warm Up What is a mixture? What are the two types of mixtures?

Isolation of Caffeine Overview

Organic Chemistry Lab 318 Spring, DUE DATES Today –Aldehyde/Ketone Qualitative Analysis Report at beginning of lab –At end of lab -- copy of laboratory.

Intro to Spectroscopy Ch 12: Spectral Unknown HDI (Hydrogen Deficiency Index) Lecture Problem 1 Due This week in lab: Ch 4: Recrystallization & Melting.

Separation of a Mixture by Extraction: Exploring acid–base chemistry in the organic laboratory Dr. Kristen Procko 17 February 2010.

Welcome to Chem 36!! Organic Chem Lab Dr. Katie Masters.

ATAMSBLAST DIGITAL AGENDA 10 – 11 College Prep Chemistry B KAUFFMAN6 – 9 February 2012 DO NOW: M: Download the three homework assignments that were due.

Mixture of benzoic acid, anthracene, and p-nitroaniline Extractions.

Lecture 4c Extraction.

Lecture 14 IR & 1H NMR Practice Problem (Lec 13)

Determination of caffeine content in tea and soft drink

Chemistry: The Science of Matter. Why Chemistry?

Separation of a Mixture

Separation Techniques. Hand separation Filtration Extraction Fractional distillation Chromatography Centrifugation Evaporation Distillation Solvent extraction.

Experiment 6: EXTRACTION of ANALGESICS. Objectives  To learn the techniques of acid-base extraction, drying organic solvents, and vacuum filtration.

U2 S3 L2 Titration page 603: Acid-Base Titration pages : Titration Step by Step page 838: Precision, Error and Accuracy Questions page 616: items.

1 Classification and purification of Organic Compounds.

Extractions Mixture of benzoic acid, anthracene, and p-nitroaniline.

Chem 51LB Week Summer Session 1 Kevin Chen.

Experimental Objectives

Organic Chemistry Lab 315 Spring, 2017 (Dr. Pant’s section)

2016 Summer Session 1 Kevin Chen

Organic Chemistry Lab 315 Fall, 2016.

Preparation of Acetaminophen

Lab does not meet on Tues., Oct. 11. (Monday classes meet).

Extractions Mixture of benzoic acid, anthracene, and p-nitroaniline.

Expt A The Grignard Synthesis of Triphenylmethanol

Separation of mixtures By Dr. Chirie Sumanasekera

Presentation transcript:

Lecture 3 Chapter 5: Extraction Lecture Problem 1 Due Thursday This week in lab: Ch 4: Recrystallization & Melting Point Procedures 1 & 2 Ch 4 PreLab Due Quiz 1 Next week in lab: Ch 4: Procedures 3 & 5 Ch 5: Extraction, Procedure 1 Ch 5 PreLab Due & Quiz 2

Chapter 5: Extraction Extraction “Pulling out” a component from a mixture Used to isolated specific compounds Used to purify a compound Types: Liquid/liquid extraction, solid/liquid extraction Two day lab: Procedure 1: Separation of an unknown three-component mixture Procedure 2: Extraction of caffeine from tea or coffee

Chapter 5: Procedure 1 Separation of an unknown three-component mixture: Acidic component (CO2H) Basic component (NH2) Neutral component Possible Unknowns: Acids: Separate by acid/base chemistry Bases: Once separated and dry, take a m.p. of each to determine the identity. Take melting points the following week. Neutrals:

Chapter 5: Procedure 1 Example: Separate these three components 1. Use a flow chart to visualize how the separation will work. 2. See photos/video.

Chapter 5: Procedure 1 Once the separation is complete: Dry each, weigh and calculate % recoveries (assume you started with equal amounts of each) Take a m.p. of each to determine identities Either take an IR of the acidic component OR an NMR of the neutral component

Chapter 5: Procedure 2 Extraction of caffeine: 1. Use tea bags (odd # desks) or coffee bags (even # desks) 2. Steep tea or coffee bags in hot water 3. Extract aqueous solution with dichloromethane (CH2Cl2) to isolate caffeine Purify caffeine by sublimation Weigh caffeine. Compare caffeine content in tea and coffee with hoodmate’s data; reference data. caffeine

Extraction of caffeine: Chapter 5: Procedure 2 Extraction of caffeine: For extraction, use a separatory funnel; Get a demo from your TA. *A few, smaller extractions are better than one big extraction.* Vent funnel while shaking. Aqueous layer: tea/coffee solution Organic layer: dichloromethane/caffeine Separatory funnel

Extraction of caffeine: Chapter 5: Procedure 2 Extraction of caffeine: Vent funnel while shaking. Point away from face, towards back of hood.

Chapter 5: Procedure 2 Once caffeine has been isolated, purify via sublimation (heat solid  gas  pure solid). Weigh the isolated caffeine and calculate the amount of caffeine per gram of tea or coffee. Compare data with hoodmate; reference the data.