Recrystallization Important method of purification for solid organic compounds. The substance to be purified is dissolved in a heated solvent. The saturated.

Slides:

Advertisements

Similar presentations

Lecture 5b Aldol Condensation.

Advertisements

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.

Methods of Purification

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

Recrystallization Impure benzoic acid

Lecture 5a Introduction Purification Techniques – Distillation: liquids, gases, some solids – Sublimation: solids only – Recrystallization: solids mainly.

Making and Separating Mixtures Salt, Salt, Salt! Reaching Saturation Concentration

Today: Your experiences with recrystallization? Mixed-solvent recrystallization MiniQuiz.

Synthesis Purification Characterization

RECRYSTALLIZATION.

Lesson 12: What Happens When Substances are Mixed with Water?

CHE 124: General Chemistry II

Mixtures and Solutions Investigation 1. Let’s talk about our results Which mixtures were separated by the screen? Gravel Which mixtures were separated.

BY: Ray Diaz, Jacob White, Daniel Hennessey, and Connary Kennedy.

Investigating the Cause

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.

Solubility curves. Solubility Curves solubility of a solute changes with temperature solubility of each compound is different at different temperatures.

Recrystallisation Purpose: To remove impurities from a sample of solid crystalline compound in order to render it as pure as possible. One way of testing.

Recrystallization & Melting Point

Recrystallization Lab # 2.

Molarity Objective: Students will understand a. solution terminology b. The factors that affect solubility c. Calculate the molarity of solutions.

Mixtures and Solutions Mixtures two or more materials stirred together How do you separate mixture? 1.Hand separation 2.Screening 3.Filtering.

Solution Composition --Concentration of a Solution--

SEPARATION OF SUBSTANCES

Solubility and the Dissolving Process Chapter 7.2 and 7.3.

Concentration and Solubility. Objectives  L Describe how concentration is measured.  L Explain why solubility is useful in identifying.

Crystallization is a separation technique that is used to separate a solid (SOLUTE) that has dissolved in a liquid (SOLVENT) and made a solution (homogenous.

Solubility Chapter 17 & 18. Solutions  Solutions are made of a solute and a solvent.  In this chapter we are concentrating on solutions of water. 

Solution Equilibrium and Factors Affecting Solubility

Mixtures and Solutions

Aim: How can we determine the amount of solute in a solution? Do Now: 1.Take out a calculator and reference tables. 2.What are the factors that can change.

Saturated and Unsaturated Solutions

Saturated Solutions and Solubility. Solubility Solubility: refers to the mass (how much in grams) of solute that can dissolve in a given amount of solvent.

Title; To purify benzoic acid crystals by recrystallisation.

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

WEBSITE REFERENCES FOR STUDENTS

Separation and Purification of Organic Compounds

Crystallization & Filtration

Solubility Curves.

Mixtures and Solutions

Experiment 2 RECRYSTALLIZATION.

Solubility Curves.

Warm Up 11/1/17 1. What is an acid? 2. What is a base?

(8th) Chapter 7-2 Cornell Notes

Solubility Curves.

Solubility Curves.

SEPARATING THE COMPONENTS OF A MIXTURE

Unit 2, Lesson 4: Separation Methods (Part 2)

Water Water is the most common solvent.

Recrystallization and Melting Point

Solubility & Saturated Solutions

Unit 13. Solutions (including Molarity)

Experiment 2 RECRYSTALLIZATION.

Recrystallization Impure benzoic acid

Big Q: What do I know for the Matter test?

Investigations 3-5 vocabulary

Ch. 13/14: Solutions Dissolution Factors.

Saturated and Unsaturated Solutions

III.4 THE PHYSICAL SEPARATION OF SUBSTANCES

7.2 Concentration and solubility

Separation of mixtures Uniformly mixed – only see one layer

15 / 06 Thursday Kaupapa: Define: dissolving solute solvent solution.

Recrystallization Impure benzoic acid

Presentation transcript:

Recrystallization Important method of purification for solid organic compounds. The substance to be purified is dissolved in a heated solvent. The saturated solution is allowed to cool and a regular array of crystals will begin to form, leaving any impurities in solution. The crystals are rinsed with cold solvent to remove any adhering impurities. The crystals are then dried.

Recrystallization Starting on p. 79, also follow lab handout: 1) Solubility Test 2) Recrystallization - Phthalic Acid, Naphthalene, and Anthracene 3) Decolorization Skip parts 4, 5, 6, and 7.