Experiment 3: Acid/base Extraction and Separation of ...

layer separation. Be sure to pick an iron ring that is properly sized - too big and the iron ring will let the separatory funnel fall straight through and break on the counter! First, place your sep funnel in the iron ring, check that the stopcock is SHUT, then add the organic and aqueous solutions. Now, place the stopper on top.

  Your, Separation

Experiment 3: Acid/base Extraction and Separation of ...

Experiment 3: Acid/base Extraction and Separation of Acidic and Neutral Substances Introduction You will be given a mixture that contains three substances in equal amounts: benzoic acid, 2-naphthol and 1,4-dimethoxybenzene (p-dimethoxybenzene): Your task: to separate these three compounds by taking advantage of differences

  Separation, Substance, Extraction

Expt 3: Reduction of Vanillin with Sodium Borohydride to ...

first be deprotonated with the strong base sodium hydroxide in order for it to dissolve. Phenols (pKa = 10) are considerably more acidic than ordinary alcohols (pKa = 16-18) because the conjugate base (called a phenolate) is resonance stabilized. Since sodium hydroxide is the conjugate base of water (pK a = 15.7), the deprotonation of vanillin will

  Sodium, Hydroxide, Sodium hydroxide, Vanillin

STRUCTURE DETERMINATION PROBLEMS USING …

STRUCTURE DETERMINATION PROBLEMS USING IR SPECTROSCOPY The IR spectra (A – F) of the six compounds are provided on the following pages. Each of the spectra is produced by one of 17 compounds that are shown below.

  Using, Structure, Problem, Precast, Determination, Spectroscopy, Structure determination problems using, Structure determination problems using ir spectroscopy

Herbert J. Gans. The Uses of Poverty: The Poor Pay All.

Second, because the poor are required to work at low wages, they subsidize a var iety of economic activities that benefit the affluent. For example, domestics subsidize the upper middle and upper

  Uses, Poverty, Poor, Herbert, Uses of poverty, The poor pay all

Expt 9: The Aldol Condensation - Towson University

solids in the vial with a microspatula to make them easier to transfer. Pour the contents of the vial onto the Hirsch funnel and filter the solid. 9. To ensure complete transfer of all the solids into the Hirsch funnel, wash out the conical vial twice, using two 3 mL portions of DI water, transferring all washings into the Hirsch funnel each time.

  Condensation, Vial, Aldol condensation, Aldol

Reactions of Alkyl Halides - Towson University

group, alleviates both the electronic and steric issues seen in the frontside attack. This is a one-step concerted (i.e. happens all at once) process where all the bond formations and breakages ... Both are extremely good leaving groups due to resonance stabilization: S CH 3 O O SCH 3 O O O O 3. Solvent: The rate of the reaction can be affected ...

  Stabilization, Steric

Strong Nucleophiles

Strong Nucleophiles – • Usually anions with a full negative charge (easily recognizable by the presence of sodium, lithium or potassium counterions)

How Generational Theory Can Improve Teaching: Strategies ...

Caulfields but as self-assured go-getters. Team-oriented Millennials have long worked in task groups and are skilled in collaborative effort. “From Barney and soccer to school uniforms and a new classroom empha-sis on group learning, Millennials are developing strong team instincts and tighter peer bonds,” write Strauss and Howe (2000, p. 44).

  Getters

Newman Projections – More Practice- Answer Key

Newman Projections – More Practice – Answer Key I. For each of the following, draw the best (most stable) and worst (least stable) Newman projection, relative to the bond indicated in each question. The most stable conformations will be staggered conformations with the largest groups ANTI to each ...

  Answers, Projection, Newman, Newman projection

Synthesis of Aspirin

• Salicylic acid should be disposed of in the solid waste container. ... • Purity test solution should be disposed of in the aqueous waste container. ... (like always cleaning your glassware before you start a reaction). Recrystallization is the most common method of

  Acid, Cleaning, Aqueous, Glassware

MATERIALS SAFETY DATA SHEET (MSDS) Ethanol (C2H5OH)

Uranium Hexafluoride, Iodine Heptafluoride, Tetrachlorosilane, Permanganic acid, Nitric acid [the nitric acid fizz reaction used formally for cleaning laboratory glassware should not be used3,5], Hydrogen Peroxide, Peroxodisulphuric acid, Potassium Dioxide, Sodium Peroxide, Potassium Permanganate, Ruthenium (VIII)

  Sheet, Data, Safety, Material, Acid, Ethanol, Cleaning, Msds, Glassware, Materials safety data sheet

Calibration of Volumetric Glassware

Calibration of Volumetric Glassware ... water or dilute aqueous solution. To indicate this difference, volumetric glassware is usually marked TD meaning to deliver or TC meaning to contain. Certain types of pipets, especially ... One cleaning solution …

  Cleaning, Aqueous, Glassware

Troubleshooting and Diagnostics Tips and Tricks

Strong acids or bases for cleaning can cause other problems –6N Nitric acid could dissolve particles from bottle filters. Do not use with these filters. Don ´t use 6N Nitric acid for UPLC ©2013 Waters Corporation 37 –If necessary, use 30% phosphoric acid with UPLC. –1% Ammonium hydroxide will dissolve silica and glass releasing Si ions

  Acid, Cleaning

EDTA Titrations 1: Standardization of EDTA and Analysis of ...

A-1. Clean the glassware and apparatus if necessary with a 1 % solution of detergent in warm water. See Cleaning and Drying of Glassware on page Error! Bookmark not defined.. Rinse the cleaned glassware and apparatus with tap water and then with distilled water. To avoid breakage, do not leave any glassware standing in an unstable position. A-2.

  Cleaning, Glassware

Controlling Contamination in LC/MS

Aggressive cleaning process If more aggressive cleaning is required (for example, when the container’s history is unknown), use the following procedure: 1. Sonicate with 10% formic or nitric acid, then water, then methanol or acetonitrile, then water. 2. Repeat two more times.

  Acid, Cleaning, Contamination, Controlling, Controlling contamination in lc ms

A GUIDE TO pH MEASUREMENT - Mettler Toledo

into contact with an aqueous measuring solution. Such a 'gel layer' arises also on the inside of the glass membrane which is in contact with a defined buffer solution (the inner buffer). glass membrane Positive internal buffer negative charge charge acidic solution alkaline solution H+ H+ glass membrane (0.2 - 0.5 mm) gel layer ca. 1000 A (10-4 mm)

  Guide, Measurement, Aqueous, A guide to ph measurement

4 STERILISATION AND DISINFECTION

Cleaning: Cleaning is removal of visible soil (e.g., organic and inorganic material) from objects and surfaces. It is normally accomplished manually or mechanically using water with detergents or enzymatic products. Decontamination: Decontamination removes pathogenic microorganisms from objects so they are safe to handle, use, or discard.

  Cleaning, Disinfection, Sterilisation, 4 sterilisation and disinfection

Draft Method 1633 Analysis of Per- and Polyfluoroalkyl ...

washing, glassware should be rinse d immediately with reagent water. Prior to use, baked glassware must be solvent rinsed and then air dried. A solvent rinse proc edure using methanolic ammonium hydroxide (1%), toluene, and methanol is recommended.

  Glassware