Experimental Error In Distillation
Contents |
the condenser need to flow? A: Very slowly. If you notice a sink filling up, let the instructor know. Q: Why do we need to anchor the drain hose? A: So the water drains in the trough only.
Sources Of Error In Distillation
We have flooded the optics lab downstairs in the past. Q: Should I distill as much sources of error in distillation lab as I can? A: No. Stop when there is still a milliliter or so in the pot, so the flask does not get too hot.
Sources Of Error In Fractional Distillation Experiment
(In the research lab, you may have reactions in which there is a significant amount of higher molecular weigh byproducts from which you are distilling and there will be considerably more residue than will be our experience in the teaching lab.) simple distillation experiment Q: When I look up boiling points, I find different values for the same compound with superscripted numbers - what does this mean? A: Those are boiling points at different pressures, and the superscripts refer to pressure in mm of Hg. The reason for this is that we often do distillation under vacuum to lower the boiling point, and thus prevent decomposition. In Chem 113A we will not be doing vacuum distillation. Q: What are the most common experimental errors in distillation? steam distillation experiment A: Placing the thermometer too high will lead to a low value for boiling point - be sure all the mercury in the bulb is below the sidearm of the still head. Inadequately clamping the apparatus can be dangerous. Over clamping can be a problem, since it causes stress in the apparatus. Refer to the Distillation section for detail on clamping the apparatus in place and clamping the pieces together. It is especially important to tighten the nut which keeps the utility clamp from rotating. Check that the joints are well greased and that all the joints are seated before turning on the thermowell. Remember to turn on the cooling water. Remember to use boiling chips. Q: I see my distilland boiling and going down in volume but there is no distillate appearing - what is wrong? A: Check that the cooling water is on - if it is then you must have a leak in the system. Stop the distillation immediately (turn off and lower the thermowell) and locate the problem (either a crack or a loose joint). Q: How do I clean the fractionating column after use? A: Rinse it through with some acetone and suck air through it using the vacuum tap to dry it. Please don't use soap and water as soap residue leads to foaming for the next user. Q: In what order do I set up the apparatus? A: Start by clamping the pot securely atop the thermowell
All Pages 20 AcetylationOfFerrocene Crystallization and Recrystallization Lab DistillationLab ElectrophilicAromaticIodinationOfVanillin Extraction A&B Lab GreenBrominationOfStilbene Kristal'sGreenChemistryPaper Kristal'sReflection LabReport1 Michelle's Bend Research Reflection Michelle'sgreenchempaper NMR and MRI Philip's Bend Research Reflection PreparationOfCyclohexene SloventEffectsInSN1 SublimationLab Tristan's
Distillation Control
GC Lab Tristan's Seventh inning stretch Add Add "All Pages" Done DistillationLab Edit 0 distillation theory 22 … 1 Tags distillation Notify RSS Backlinks Source Print Export (PDF) Philip Deenik Michelle Guerin Kristal Kiel Lab 3: Distillation Carol:
Distillation Experiment For Kids
Although this edit is only under one name, we were all sitting here doing it together. We did this so it would be easier for you since you only had to look at one "redone" http://www.chemistry.sjsu.edu/straus/FAQ/Technique%20FAQ/DistillationFAQ.htm document. Introduction: Distillation is a common technique involving separating of liquids by boiling point. Certain substances begin boiling (and vaporize) at a more given temp, making it possible to isolate the substances into separate phases based on their boiling point (while one may vaporize at a lower temp, the other may remain in liquid form.) be careful how you say this: it's not that one component vaporizes first, it is that https://ochemwonderstudents.wikispaces.com/DistillationLab it vaporizes more at a given temp (more molecules are in the gas phase). By isolating the vapor at different temperatures, the impure substance can be purified. There are many factors contributing to the effectiveness of the distillation process. A major factor is the range difference between boiling points of the substances. If the substances have very similar boiling points, it will be very difficult to isolate the impurities. This experiment involved a simple distillation where the acetone had a much lower boiling point than the impurities. A more complex set up would be required for the distillation of two or more substances with similar boiling points. This experiment involves the distillation of impure acetone for a the Great American Paint Company. Procedure: Following the proceeding instructions, use a macroscale glassware kit to assemble the apparatus in figure 1. Set up a ring stand and place heating stir plate on top of a slightly-extended lab jack on it's base. Use a wide-mouthed dish filled with water instead of a Thermowell. Place the dish on the heating stir plate and clamp a 100 mL round-bottom flask so that it rests an inch or so deep in the water bath. Make sure the flask is secure and immobile. Add 40 mL of contaminated aceton
you read the method for using a volumetric flask correctly. If you do not have a hot/cold water bath http://www.monashscientific.com.au/AlcoholDistillationCommonErrors.htm to bring the temperature of the wine and the collected https://www.scribd.com/doc/105189778/Simple-and-Fractional-Distillation-formal-Report distillate up/down to 20oC for an accurate measurement of 250ml, at least make sure that - the volume of the wine and diluted distillate is measured accurately by - using the same volumetric flask and measuring both at the error in same temperature. Leaks anywhere in the apparatus, can allow alcohol to escape and be lost through these leaks, giving a false low reading. Make sure all joints are secure (see safety note). Make sure that the end of the adaptor receiver protrudes well below the water or distillate in the error in distillation volumetric receiving flask (see diagram). This can best be achieved by attaching a small piece of plastic tubing to the end of the adapter reciever to obtain the appropriate length and to prevent breakage of the bottom of the receiving volumetric flask. Loss of alcohol can also occur through evaporation of the warm distillate from the volumetric receiving flask, however, this can be prevented by seating the flask in a cold water bath, packed with ice. ALso make sure that an adequate water flow is running through the
allUploadSign inJoinBooksAudiobooksComicsSheet MusicSimple and Fractional Distillation_formal ReportUploaded by Bienn Paulo LafortezaDrinkEthanolVodkaDistillation4.7K viewsDownloadEmbedSee MoreCopyright: Attribution Non-Commercial (BY-NC)Download as DOCX, PDF, TXT or read online from ScribdFlag for inappropriate content SIMPLE AND FRACTIONAL DISTILLATION Bienn Paulo A. Laforteza , Michael James O. Lazatin, Gell Marvi C. LeeMary Therese S.D. Leoncio and Denise T. MagdamitGroup 6 2G Medical Technology Organic Chemistry Laboratory ABSTRACT Distillation is the extraction of volatile component of a mixture through a two way process, evaporation andcondensation. The experiment aimed to differentiate simple from fractional distillation, to separate its components,alcohol and water, and to determine its percent concentration of ethanol by using the fractional distillation method.Vodka was the alcoholic beverage that was purified. A certain volume (30 mL) of vodka was placed on the pear-shaped flask with boiling chips on a fractional distillation set-up and was heated constantly with an alcohol lamp. A0.50 mL of distillate was collected in every test tube until the temperature reached close to 100 o C. The first and lastdistillates were kept and its flammability was tested. The first distillate was flammable meaning it has the component,ethanol, while the last distillate inflammable thus, having the water component after being purified. The volume of distillate collected by the end of the distillation was 15.5 mL at 99 o C, giving a percent ethanol of 15% INTRODUCTION Distillation is a process of converting a liquid to avapour, condensing the vapour and then collecting thedistillate in another container. 1 Distillation is a widelyused method for separating mixtures based ondifferences in the conditions required to change thephase of components of the mixture. 2 Distillation is animportant commercial process that is used in thepurification of a large variety of materials. 3 Distillationcan be used in purifying water or other substances andremoving or separating the components of mixturesuch as an alcoholic beverage like vodka. Vodka is aclear liquor manufactured from ethyl alcohol. It lackscolor, and normally has very little taste or aroma. It issaid to have been originally created from potatoes inRussia for medicinal purposes. Nowadays, Vodka isdistilled from barley, wheat or rye. Most flavoredvodka contains 30-35% alcohol,