Labware Picture Glossary

Total Page:16

File Type:pdf, Size:1020Kb

Labware Picture Glossary Labware Picture Glossary www.homesciencetools.com Pack your lab like a pro with this chemistry labware guide. Complete with images, names, and types of common lab items and their uses, this picture glossary will help you select the right supplies. Popular Glassware Griffin beakers are used to mix Erlenmeyer flasks, like beakers, chemicals, dissolve into solutions, can be used to mix, dissolve into heat or cool solutions, and hold sand solutions, and heat or cool solutions. or water baths. They typically have In addition, they can be plugged with graduations, but they are not very stoppers and used to catch vapor or accurate. condensed liquid. Graduations are not very accurate. Florence/boiling flasks are round Volumetric flasks are used to to provide uniform heating or boiling accurately prepare solutions. A of liquids. They can be used to mix weighed amount of solid chemical is or store solutions as well as collect placed at the bottom, and the liquid vapor in distillation processes. solvent is added until the fill line is They can have either round or flat reached. bottoms. Filtering flasks are used to filter Graduated cylinders are used for mixtures through a funnel and filter precise and accurate measurement. paper. A tube near the top prevents Smaller sizes can be more accurate, unwanted pressure buildup. The but hold less volume, while larger process can be accelerated with a sizes sacrifice accuracy for volume. vacuum pump. Test tubes are used to observe Burettes are used to measure chemical reactions, mix solutions, liquids drop-by-drop for titration heat solutions, melt or burn solids, experiments or other experiments and perform chemical analysis. requiring precise measurement. © Home Science Tools. All rights reserved. Reproduction for personal or classroom use only. Home Science Tools | Labware Picture Glossary Bottles are used to store solid and Pipettes or droppers (pictured) are liquid chemicals for extended periods used to measure or transfer liquids of time. Barnes bottles (pictured) a few drops at a time. Mohr pipettes are small bottles with dropper lids for are graduated pipettes used for drop-by-drop measurement. precise measurement. Condensers are used to condense Watch glasses can be used to cover chemical vapor into a liquid. This is beakers, evaporate water from done by sending the vapor through a solutions, weigh out solid chemicals, long (often coiled) glass tube to cool. or observe samples under a stereo microscope. Evaporating dishes are used to Crucibles are used to melt or burn separate water and solids from solid chemicals over a burner. a solution by allowing the water They are made from heat-resistant to evaporate off into the air. This ceramics to prevent breakage. is usually done by heating the evaporating dish over a burner. A mortar and pestle is used to Funnels are used to pour liquids into crush up solid chemicals into smaller narrow-mouth containers such as pieces, or to grind solids into fine flasks and bottles.Buchner funnels powder. This makes dissolving solids (pictured) are special two-piece into solutions much easier. funnels for filtering mixtures through filter paper into a filtering flask. Thermometers assure accurate A separatory funnel separates temperature measurements in two immiscible liquids of different labwork. Find partial immersion, densities. The heaver liquid settles wall mounted, indoor/outdoor, at the bottom to be drawn off. combinations with hygrometers and Separatory funnels are also used to hydrometers, digital, and infrared. slowly add a reagent in a distillation or reaction process. Popular Lab Equipment Lab burners come in many different Hot plates are typically used to heat styles and usually run on alcohol, glassware and the liquid inside. They propane, or butane. They are used to can be combined with a magnetic heat or boil solutions, burn or melt stirrer to both mix and heat the liquid solid chemicals, or form glass tubing. contents all at once. They have more precise temperature control than an alcohol lamp or burner. A centrifuge is a motorized device A scissor jack is used to elevate used to spin liquids at high speeds. equipment for various lab setups. In labs, a centrifuge uses gravity The height is adjustable for flexibility. and centrifugal force to separate Use to elevate lab heaters and substances with different mass. An stirrers, beakers, flasks, and other example is separating particles from glassware. Scissor jacks are often a liquid. useful in distillations. © Home Science Tools. All rights reserved. Reproduction for personal or classroom use only. Home Science Tools | Labware Picture Glossary Rubber tubing is used to connect Wash bottles are plastic bottles evaporating chambers, flasks, with a nozzle at the top for rinsing condensers, and other glassware, glassware, cleaning/disinfecting, or usually in distillation processes. applying solutions. They can be filled with a variety of reagents, such as water or alcohol. Support stands come in different Ring supports are also called iron sizes and styles. Support stands are rings or ring clamps. Used with a ring versatile and can have various clamps stand; ring supports raise and secure or rings mounted to them to hold an object above a work surface. For several pieces of equipment at once. example, a round bottom flask or separatory funnel. Use universal clamps to hold A burette clamp is a metal tool that common labware like plates, beakers, attaches to a ring stand at various flasks, test tubes, and more. With heights. It’s used to hold a burette, a ring stand and more, a universal test tube, flask, etc. Double burette clamp can set up complex distillation clamps hold two burettes at once. Its apparatus or other laboratory clamp jaw holds the burette securely equipment. in place. Wire gauze is a fine mesh wire sheet Use a lab scoop/spatula for easy that is used to evenly distribute heat dispensing of chemicals. Lab scoops from an open flame. It rests on a or spatulas are often double-sided. support ring attached to a ring stand One side may be used to scoop and and holds glassware above a burner. the other to break up chunks of powdered chemicals. Stainless steel resists contamination. Glass tubing is usually inserted into Stoppers are used to seal narrow- stoppers to attach rubber tubing, mouth containers such as flasks and but it can also be used to splice two test tubes, and to hold pieces of glass pieces of rubber tubing. It can be tubing for distillation experiments, cut with a file or tubing cutter and or to mount thermometers inside a shaped with a flame. flask. Desiccators are sealable containers A calorimeter measures the heat for low-humidity and dust-free transfer during a chemical reaction storage. The most common type or physical change. A reactant is is round, made of heavy glass, and placed inside the inner chamber has a removable platform inside. of the calorimeter. Measuring the Desiccant sits below the platform and temperature difference before and items to be stored sit atop it. after allows heat transfer evaluation. © Home Science Tools. All rights reserved. Reproduction for personal or classroom use only..
Recommended publications
  • Extraction of Water Samples by Separatory Funnel 1. Scope And
    Alpha Analytical, Inc. ID No.:2165 Facility: Mansfield Revision 8 Department: Organic Extractions Published Date:8/9/2013 10:58:53 AM Title: Extraction of Water Samples by Separatory Funnel 3510 Page 1 of 11 Extraction of Water Samples by Separatory Funnel References: EPA 3510C, SW-846, Test Methods for Evaluating Solid Waste: Physical/Chemical Methods, EPA SW-846, Update III, 1997. Method 8081B , Reference: SW-846, Test Methods for Evaluating Solid Waste: Physical/Chemical Methods, EPA SW-846, Update IV, February 2007. Method 8082A , Reference: SW-846, Test Methods for Evaluating Solid Waste: Physical/Chemical Methods, EPA SW-846, Update IV, February 2007. Method 8270D , Reference: SW-846, Test Methods for Evaluating Solid Waste: Physical/Chemical Methods, EPA SW-846, Update IV, February 2007 1. Scope and Application Matrices: This method is applicable to aqueous samples. Definitions: Refer to Alpha Analytical Quality Manual. This method describes the procedure for extracting water-insoluble and lightly water-soluble organic compounds from aqueous samples. The method also describes concentration techniques suitable for preparing the extract for the various determinative methods listed in Table 1. The data report packages present the documentation of any method modification related to the samples tested. Depending upon the nature of the modification and the extent of intended use, the laboratory may be required to demonstrate that the modifications will produce equivalent results for the matrix. Approval of all method modifications is by one or more of the following laboratory personnel before performing the modification: Area Supervisor, Department Supervisor, Laboratory Director, or Quality Assurance Officer. This method is restricted to use by or under the supervision of trained analysts.
    [Show full text]
  • Standard Operating Procedures
    Standard Operating Procedures 1 Standard Operating Procedures OVERVIEW In the following laboratory exercises you will be introduced to some of the glassware and tech- niques used by chemists to isolate components from natural or synthetic mixtures and to purify the individual compounds and characterize them by determining some of their physical proper- ties. While working collaboratively with your group members you will become acquainted with: a) Volumetric glassware b) Liquid-liquid extraction apparatus c) Distillation apparatus OBJECTIVES After finishing these sessions and reporting your results to your mentor, you should be able to: • Prepare solutions of exact concentrations • Separate liquid-liquid mixtures • Purify compounds by recrystallization • Separate mixtures by simple and fractional distillation 2 EXPERIMENT 1 Glassware Calibration, Primary and Secondary Standards, and Manual Titrations PART 1. Volumetric Glassware Calibration Volumetric glassware is used to either contain or deliver liquids at a specified temperature. Glassware manufacturers indicate this by inscribing on the volumetric ware the initials TC (to contain) or TD (to deliver) along with the calibration temperature, which is usually 20°C1. Volumetric glassware must be scrupulously clean before use. The presence of streaks or droplets is an indication of the presence of a grease film. To eliminate grease from glassware, scrub with detergent solution, rinse with tap water, and finally rinse with a small portion of distilled water. Volumetric flasks (TC) A volumetric flask has a large round bottom with only one graduation mark positioned on the long narrow neck. Graduation Mark Stopper The position of the mark facilitates the accurate and precise reading of the meniscus. If the flask is used to prepare a solution starting with a solid compound, add small amounts of sol- vent until the entire solid dissolves.
    [Show full text]
  • SC-300 Pro Kit Manual 1 Version 2.3D Materials Provided in the Kit
    Vinmetrica SC-300 Pro Kit™ User Manual Vinmetrica SC-300 Pro Kit is a simple and robust device that provides high accuracy in determination of sulfite (SO2), pH and titratable acidity (TA) levels in wines, ciders, and other liquids. These are essential parameters to control in the effort to make high quality wines. The Pro kit includes lab accessories for the SC-300 Analyzer. Table of Contents: Materials Provided in the Kit............................................................................................................... 2 Things you will need............................................................................................................................ 2 Why Test for SO2, pH and TA?............................................................................................................ 3 Theory of Operation............................................................................................................................. 4 Setup.................................................................................................................................................... 5 Setting up the SC-300 for the first time................................................................................... 5 Assembling the Pro Kit Equipment......................................................................................... 6 Burette Maintenance................................................................................................................ 8 Burette Reading ......................................................................................................................
    [Show full text]
  • ARC Laboratory Manual for Architectural Conservators
    A LABORATORY MANUAL FOR ARCHITECTURAL CONSERVATORS Jeanne Marie Teutonico ICCROM Rome 1988 CONTENTS Foreword v Preface vii General Principles: Laboratory Science 1. Sampling 3 2. Measurement and Error: Precision, Accuracy, Statistics 7 3. Measurement: Mass (Use of the Balance) 11 4. Measurement: Length (Use of the Vernier Caliper and Micrometer) 16 5. Measurement: Volume 21 6. Measurement: Solutions 26 7. Measurement: pH 30 Porous Building Materials 8. Water Absorption by Total Immersion 35 9. Water Drop Absorption 41 10. Penetration of Water: Capillary Action 43 11. Porosity of Granular Beds 45 12. Porosity in Solids: Indirect Measurement by Water Absorption 50 13. Porosity in Solids: Hydrostatic Weighing 52 14. Movement of Salts 56 15. Salt Crystallization 57 16. Qualitative Analysis of Water-soluble Salts and This publication was printed with a generous Carbonates 58 contribution from the government of 17. Semiquantititive Analysis of Water-soluble Salts 68 Finland. Earthen Building Materials 18A. Particle Size Analysis: Part I Sieving Procedure 73 ISBN 92-9077-083-X Via di San Michele 13 00153 Rome RM, Italy Printed in Italy III Earthen Building Materials (continued) FOREWORD 18B. Particle Size Analysis: Part II Sedimentation Procedure: Hydrometer Method 83 19. Plastic Limit of Soils 96 After his appointment as director of ICCROM in 1977, Sir Bernard FEILDEN proposed to emphasize the interdisciplinary 20. Liquid Limit of Soils 102 character of conservation by introducing scientists to field work and architects to laboratories. Consequently it was decided to introduce a series of laboratory exercises Stone. Brick and Mortars designed for the needs of architectural conservators and conservation architects in the program of the International 21.
    [Show full text]
  • General Chemistry Laboratory I Manual
    GENERAL CHEMISTRY LABORATORY I MANUAL Fall Semester Contents Laboratory Equipments .............................................................................................................................. i Experiment 1 Measurements and Density .............................................................................................. 10 Experiment 2 The Stoichiometry of a Reaction ..................................................................................... 31 Experiment 3 Titration of Acids and Bases ............................................................................................ 10 Experiment 4 Oxidation – Reduction Titration ..................................................................................... 49 Experiment 5 Quantitative Analysis Based on Gas Properties ............................................................ 57 Experiment 6 Thermochemistry: The Heat of Reaction ....................................................................... 67 Experiment 7 Group I: The Soluble Group ........................................................................................... 79 Experiment 8 Gravimetric Analysis ........................................................................................................ 84 Scores of the General Chemistry Laboratory I Experiments ............................................................... 93 LABORATORY EQUIPMENTS BEAKER (BEHER) Beakers are containers which can be used for carrying out reactions, heating solutions, and for water baths. They are for
    [Show full text]
  • Laboratory Equipment Reference Sheet
    Laboratory Equipment Stirring Rod: Reference Sheet: Iron Ring: Description: Glass rod. Uses: To stir combinations; To use in pouring liquids. Evaporating Dish: Description: Iron ring with a screw fastener; Several Sizes Uses: To fasten to the ring stand as a support for an apparatus Description: Porcelain dish. Buret Clamp/Test Tube Clamp: Uses: As a container for small amounts of liquids being evaporated. Glass Plate: Description: Metal clamp with a screw fastener, swivel and lock nut, adjusting screw, and a curved clamp. Uses: To hold an apparatus; May be fastened to a ring stand. Mortar and Pestle: Description: Thick glass. Uses: Many uses; Should not be heated Description: Heavy porcelain dish with a grinder. Watch Glass: Uses: To grind chemicals to a powder. Spatula: Description: Curved glass. Uses: May be used as a beaker cover; May be used in evaporating very small amounts of Description: Made of metal or porcelain. liquid. Uses: To transfer solid chemicals in weighing. Funnel: Triangular File: Description: Metal file with three cutting edges. Uses: To scratch glass or file. Rubber Connector: Description: Glass or plastic. Uses: To hold filter paper; May be used in pouring Description: Short length of tubing. Medicine Dropper: Uses: To connect parts of an apparatus. Pinch Clamp: Description: Glass tip with a rubber bulb. Uses: To transfer small amounts of liquid. Forceps: Description: Metal clamp with finger grips. Uses: To clamp a rubber connector. Test Tube Rack: Description: Metal Uses: To pick up or hold small objects. Beaker: Description: Rack; May be wood, metal, or plastic. Uses: To hold test tubes in an upright position.
    [Show full text]
  • Teacher Training Workshop for Educators of Students Who Are Blind Or Low Vision
    Supalo et al.: Teacher Training Workshop for Educators of Students Who Are Blind or Low Vision Vol. 13, No. 1- Spring, 2009 Journal of Science Education for Students with Disabilities Teacher Training Workshop for Educators of Students Who Are ● , Danielle Dwyer, Heather, L. Eberhart, Blind or Low Vision Natasha Bunnag, Thomas E. Mallouk Cary A. Supalo, Danielle Dwyer, Heather L. Eberhart, Natasha Bunnag, and Thomas E. Mallouk Abstract: The Independent Laboratory Access for the Blind (ILAB) project has developed a suite of speech accessible tools for students who are blind or low vision to use in secondary and post- secondary science laboratory classes. The following are illustrations of experiments designed to be used by educators to introduce them to the ILAB tools, and to demonstrate how these tools can be incorporated into standard laboratory experiments. Information about the Lawrence Hall of Science’s SAVI/SELPH curriculum is also discussed. INTRODUCTION A 1993 study found that over 2/3 of graduates from the schools for the blind were unem- Residential schools for the blind have pro- ployed and a significant percentage received vided educational services to students who uncompetitive wages (6). In addition, only are blind or low vision (BLV) for well over 2.7% of the workforce in the science, technol- 100 years (1). In 1975, the passage of public ogy, engineering, and mathematics professions law 94-142 (Education of All Handicapped are physically disabled, and, of this percent- Children Act, later renamed the Individuals age, only a small number are blind (2). Provid- with Disabilities Education Act) started the ing blind and visually impaired students with trend for students who are blind to enter the the opportunity to work in a science labora- mainstream classroom (2).
    [Show full text]
  • Kjeldahl Distillation Unit
    Terms of Business v There are frequent fluctuations in the cost of input. So we may not be able to give prior intimation regarding changes in the price structure. v Packing, Forwarding, Freight and Insurance will be Charged Extra. v Sales Tax and Excise Duty will be extra as per Central or State Government Rules. v Every possible care is taken in packing, but it is difficult to undertake responsibility of loss, breakage or damage during transit. v R/R and our bill be sent though V. P. P. or any scheduled bank. New customers are requested to advance 25% of the estimated value. v While placing the order, please give clear despatch instructions indicating C. S. T. Number, Name of Railway Station, Your Banker and Our Catalogue Number. v All problems shall be solved amicably subject to Ambala Jurisdiction. GUPTA SCIENTIFIC INDUSTRIES Ambala Cantt. THIS CANCELS OUR ALL PREVIOUS PRICE LISTS PPPrice List 2017-18 CATALOGUE CONTENTS Product Range Pages Interchangeable Standard Joints, Adapters, Stirrers, Condensers, 1 to 49 Laboratory Flasks, Columns, Separating Funnels, Assemblies, Glasswares Water Distillation, Essential Oil, Soxhlet Apparatus. Volumetric Burettes, Pipettes, Micro Pipettes, Measuring Cylinders, 50 to 74 Glasswares Measuring Flasks, Culture Tubes, Centrifuge Tube & Test Tubes. Sintered Sintered Crucibles, Funnels, Chromatography Columns and 75 to 84 Glasswares Filter Assembly. Gas Estimation Impinger, Gas Burettes, Tubes, Gas Wash Bottles, 85 to 90 Apparatus Oxygen Purity and Orsat Apparatus. Special Semi Micro Ware, Clinical Laboratory Apparatus, 91 to 97 Glasswares Electrodes and Milk Testing Apparatus. Supplementary Stopcocks, Rotaflow Screw Type Stopcocks, Teflon Key 98 to 123 Glasswares Stopcocks, Manometers, Weighing Bottles, S.
    [Show full text]
  • 2020 NGSS High School Chemistry Supply List
    Recommended Minimum Core Inventory for NGSS High School Chemistry, Class of 32 Students Qty. Per Catalog Equipment / Supplies FREY Catalog # Total Classroom Unit $ SAFETY EQUIPMENT 1 Acid Corrosive Storage Cabinet 528445 $602.09 $602.09 1 Corrosive Storage Cabinet 528446 $1,009.95 $1,009.95 1 Chemical Spill Kit 1491078 $146.29 $146.29 Chemical Storage Reference - Ask your Frey 1 Chemical Storage Reference Scientific Representative how to safely store your chemicals with our Color Code System. 1 Emergency Shower and Eyewash 572443 $3,135.95 $2,983.95 1 Gravit-Eye Portable Eye Wash Station, 16 gallon 1320143 $333.39 $333.39 1 Fire Blanket w/ Hanging Pouch, 6' L x 5' W 1488340 $149.99 $149.99 1 Dry Chemical Fire Extinguisher 1471240 $153.79 $153.79 1 First Aid Station for 25 people 1451983 $70.09 $70.09 1 Flammables Storage Cabinet, 23-1/4" x 35" x 12 gallon, yellow 601016 $960.95 $960.95 1 Fume Hood Labconco Basic 47 526701 $10,081.49 $10,081.49 32 Indirect Vent Safety Goggles 577927 $3.89 $124.48 1 Goggle Sanitizer Cabinet 1574050 $911.99 $911.99 32 Rubberized Aprons, 27" x 42" 589239 $8.39 $268.48 EQUIPMENT / SUPPLIES 1 Balance, Ohaus Pioneer Precision, 0.001 mg, 160g capacity 2001994 $1,254.69 $1,254.69 5 Balance, Ohaus Navigator Electronic , .01g, 510g capacity 2012765 $328.79 $1,643.95 3 Beakers, 50 mL, Pyrex Vista Low Form Borosilicate, pk/12 529623 $35.09 $105.27 3 Beakers, 100 mL, Pyrex Vista Low Form Borosilicate, pk/12 529624 $35.09 $105.27 2 Beakers, 250 ml, Pyrex Vista Low Form Borosilicate pk/12 529626 $37.39 $74.78 2 Beakers,
    [Show full text]
  • Laboratory Supplies and Equipment
    Laboratory Supplies and Equipment Beakers: 9 - 12 • Beakers with Handles • Printed Square Ratio Beakers • Griffin Style Molded Beakers • Tapered PP, PMP & PTFE Beakers • Heatable PTFE Beakers Bottles: 17 - 32 • Plastic Laboratory Bottles • Rectangular & Square Bottles Heatable PTFE Beakers Page 12 • Tamper Evident Plastic Bottles • Concertina Collapsible Bottle • Plastic Dispensing Bottles NEW Straight-Side Containers • Plastic Wash Bottles PETE with White PP Closures • PTFE Bottle Pourers Page 39 Containers: 38 - 42 • Screw Cap Plastic Jars & Containers • Snap Cap Plastic Jars & Containers • Hinged Lid Plastic Containers • Dispensing Plastic Containers • Graduated Plastic Containers • Disposable Plastic Containers Cylinders: 45 - 48 • Clear Plastic Cylinder, PMP • Translucent Plastic Cylinder, PP • Short Form Plastic Cylinder, PP • Four Liter Plastic Cylinder, PP NEW Polycarbonate Graduated Bottles with PP Closures Page 21 • Certified Plastic Cylinder, PMP • Hydrometer Jar, PP • Conical Shape Plastic Cylinder, PP Disposal Boxes: 54 - 55 • Bio-bin Waste Disposal Containers • Glass Disposal Boxes • Burn-upTM Bins • Plastic Recycling Boxes • Non-Hazardous Disposal Boxes Printed Cylinders Page 47 Drying Racks: 55 - 56 • Kartell Plastic Drying Rack, High Impact PS • Dynalon Mega-Peg Plastic Drying Rack • Azlon Epoxy Coated Drying Rack • Plastic Draining Baskets • Custom Size Drying Racks Available Burn-upTM Bins Page 54 Dynalon® Labware Table of Contents and Introduction ® Dynalon Labware, a leading wholesaler of plastic lab supplies throughout
    [Show full text]
  • Bel-Art Clamps and Holders Catalog.Pdf
    clamps and holders C a b Tubing Clamps a. screw Clamp Precise Control Offers on/off and fine control so accurate that it replaces stopcocks in many applications. Can be installed without disconnecting tubing or interrupting operation. Molded of Delrin® plastic, the clamp is autoclavable and resistant to acids, alkalis and organic solvents. Accepts flexible 1 tubing up to 14mm ( ⁄2") O.D. 3 per bag. CaTalog no. fiTs Tubing up To: 1 F18212-0000 14mm ( ⁄2") O.D. b. spring Tubing Clamps Squeeze Control Perfect for all flexible tubing, this positive-action, self-closing clamp opens by squeezing the handles together. Made of chemical and stain-resistant Delrin® plastic and stainless steel. 3 per bag. CaTalog no. fiTs Tubing up To: 5 H18213-0000 8mm ( ⁄16") O.D. 15 H18214-0000 12mm ( ⁄32") O.D. C. Tubing Clamp Serrated Jaws 1 Strong acetal plastic clamp provides secure closure on tubing with a wall of 0.82mm ( ⁄32") or thinner. Slides over tubing at any point for easy installation and may be left open for convenient storage without constricting flow. It locks when closed and springs open when the 1 5 locking tab is released. Jaws are 2.7cm (1 ⁄16") long; total length is 5.9cm (2 ⁄16") long. 12 per bag, 6 bags per case. CaTalog no. fiTs Tubing up To: 1 F18218-0000 0.82mm ( ⁄32") Wall Thickness Use a Scienceware® Tubing Sizer to Select the Right Size Tubing, Page 154 56 www.novatech-usa.com (866) 433-6682 clamps and holders D E D. swing Jaw™ Tubing Clamps For All Flexible Tubing Zinc-plated steel clamp provides a non-slip closure for all flexible tubing – even heavy-walled vacuum lines.
    [Show full text]
  • Extraction Read 5.1 & 2.18 & 2.21 in Your Lab Text. Extraction Is A
    Extraction Read 5.1 & 2.18 & 2.21 in your lab text. Extraction is a separation technique based on differences in solubilities of substances in two immiscible solvents (usually water and a water insoluble organic solvent). solubility in solvent 1 Kc = partition coefficient = ------------------------ solubility in solvent 2 example: Given compound A, K (ether:water) = 4.0, how much of A can be extracted from a solution of 10.0 g of A in 100 mL of water with a single portion of 100 mL of ether? X / 100 mL ether Kc = 4.0 = ------------------------------- (10.0 - X) / 100 mL water X = 8.0 grams of A extracted into the ether -same as above, but extract two times with 50 mL of ether each time. X / 50 mL ether first extraction: Kc = 4.0 = ------------------------- (10.0 - X) / 100 mL water X = 6.67 grams of A extracted Y / 50 mL ether second extraction: Kc = 4 0 = ----------------------------- (3.33 - Y) / 100 mL water Y = 2.22 grams of A extracted total extracted = X + Y = 6.67 + 2.22 = 8.89 grams ==> multiple extractions with smaller amounts of solvent are more efficient than a single extraction with the same total amount of solvent. DRYING: an organic liquid that has been in contact with water is "wet" (contains some water). To "dry" it, use an inorganic drying agent. See Table 2.1 in your lab text. EXTRACTION AND WASHING The processes of extraction and washing are mechanically the same. Extraction refers to the recovery of a desired substance from a complex mixture, while washing denotes the removal of unwanted material.
    [Show full text]