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Topic: Volumetric flask

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Laboratory flask

Erlenmeyer flask

Buchner flask

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Watch glass

Laboratory equipment

Conical measure

Gas syringe

Laboratory glassware

Test tube

Soxhlet extractor

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Graduated cylinder

Buchner funnel

Burette

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	Eye-Lab Liquid Handling Volumetric Flask Filling
		Filling a volumetric flask up to the mark with a solution may appear to be a very simple operation for a chemist; however, one seldom considers the possible consequences that some common procedural errors may have on experimental analytic data.
		Volumetric flasks are calibrated at 20°C, and therefore the total quantitative reproducibility of volumes is guaranteed only when the solvent being introduced is at this exact temperature.
		The flask is secured to the base of the chamber with an automatic centering device, similar to the type used by opticians.
	www.wolflabs.co.uk /eye_lab_liquid_handling_volumetric_flask_filling.htm (1362 words)

	Volumetric flask - Wikipedia, the free encyclopedia
		A volumetric flask (vol flask for short) is a piece of laboratory glassware used to measure a very precise and accurate amount of a liquid, and is used for such when the amount is too big for a pipette or burette.
		The use of a volumetric flask almost always involves either measuring a certain amount of a liquid, or diluting a liquid to the size of the flask.
		This is done by adding the solvent (or the liquid to be measured) to the flask until it reaches the neck, at which point it is usually added much more slowly, via pipette or dropper depending on the size of the flask.
	en.wikipedia.org /wiki/Volumetric_flask (332 words)

	Volumetric flask: Just the facts... (Site not responding. Last check: 2007-10-15)
		When the liquid has been added to that point (so the meniscus (A disk of cartilage that serves as a cushion between the ends of bones that meet at a point) is on the line), it is usually accurate to within a small fraction of a percent and highly precise.
		The use of a volumetric flask almost always involves either measuring a certain amount of a liquid, or diluting (additional info and facts about diluting) a liquid to the size of the flask.
		When the flask has been completely filled it is then stoppered and inverted several times if this is a dilution.
	www.absoluteastronomy.com /encyclopedia/v/vo/volumetric_flask.htm (229 words)

	Erlenmeyer flask - Wikipedia, the free encyclopedia
		The main advantages in an Erlenmeyer flask are that it is less likely to tip over than a Florence flask and the smaller neck slows evaporative loss better than a beaker.
		However the main difference is that conical flasks may be stoppered using rubber bungs, so as the contents of the flask may be mixed or transported safely.
		The flask is not usually used when heating substances vigorously, this task usually being left to the Florence flask.
	en.wikipedia.org /wiki/Erlenmeyer_flask (204 words)

	Seattle Central Community College
		Volumetric flasks, burets, pipets and graduated cylinders are calibrated to measure volumes of liquids.
		Volumetric flasks are calibrated to contain a specified volume when filled to line etched on the neck.
		For volumetric pipets, transfer the pipet to the container to be used and remove the pipet pump from the pipet or use the dispensing bar.
	www.seattlecentral.org /faculty/ptran/tech.html (1728 words)

	ChemLab - Glassware - Volumetric Flasks
		A volumetric flask is used to make up a solution of fixed volume very accurately.
		This volumetric flask measures 500 mL ±; 0.2 mL.
		Move your eye to the level of the mark on the neck of the flask and line it up so that the circle around the neck looks like a line, not an ellipse.
	www.dartmouth.edu /~chemlab/techniques/vol_flasks.html (165 words)

	CALIBRATION OF VOLUMETRIC GLASSWARE
		The reasons for choosing one part per thousand as a goal are that pipets, burets, volumetric flasks and the analytical balance are capable of giving this degree of accuracy with relative ease, whereas the difficulties and time required to attain higher accuracy are so great that it is seldom worth the effort.
		Volumetric flasks are designed to contain the indicated volume of liquid.
		Volumetric flasks must never be heated, either with an open flame or on a hot plate.
	chem.pdx.edu /~atkinsdb/teach/321/CALVOL.htm (1698 words)

	Seattle Central Community College
		Volumetric flasks, burets, pipets and graduated cylinders are calibrated to measure volumes of liquids.
		Volumetric flasks are calibrated to contain a specified volume when filled to line etched on the neck.
		For volumetric pipets, transfer the pipet to the container to be used and remove the pipet pump from the pipet or use the dispensing bar.
	seattlecentral.edu /faculty/ptran/tech.html (1728 words)

	Flask \| Laboratory Flasks \| Polypropylene Flasks - Best Lab Deals (Site not responding. Last check: 2007-10-15)
		Unique flask holders are molded from glass filled polypropylene, and are durable as well as easy to clean.
		These TPX® (Polymethylpentene) flasks are highly transparent and are individually calibrated with a ring marking the exact volume on th.
		Flasks are calibrated at 20°C. With sharp, permanent graduation line and big, white inscriptions...
	www.bestlabdeals.com /Flasks_s/642.htm (196 words)

	Is the Flask Quantitatively Clean?
		A volumetric flask is examined to make sure it is clean and that water drains properly in the neck leaving no droplets behind.
		Solid from Dish to Flask and the alternative Solid from Dish to Beaker to Flask illustrate two procedures for quantitatively transferring a solid to a volumetric flask.
		It is critical that the inner walls of the volumetric flask be checked for quantitative drainage before the solid is transferred to the flask.
	jchemed.chem.wisc.edu /JCESoft/CCA/CCA6/MAIN/2QuantMenu/Transfer/DISH/DISH1_2/THUMBS.HTM (276 words)

	Untitled Document
		When the flask is properly filled to the TD calibration mark, it will deliver the specified volume to another container.
		Quantitatively transfer the solid to the flask by using a funnel to guide the solid into the flask, or alternatively, fold the corners of a weigh boat into a pouch and pour the solid directly into the flask.
		Wash down the neck of the flask and swirl the solution until the solid is dissolved.
	www.sas.org /E-Bulletin/2002-02-08/labNotes/body.html (815 words)

	[No title]
		Procedure Outline The weight of deionized water contained in the flask or pipet is used to determine the actual volume contained in the glassware.
		Volumetric Flask Calibration Record the serial number of the flask.
		Wash, dry, weigh, and record the mass of the volumetric flask to be calibrated.
	www.unlv.edu /Colleges/Health_Sciences/Health_Physics/procedures/11-flasks.doc (443 words)

	Measurements and Error (Site not responding. Last check: 2007-10-15)
		Fill the 100 ml volumetric flask with 100 ml water.
		Fill the 100 ml volumetric flask with (estimated) 40 ml water.
		Compare the volumes of water in both 100 ml volumetric flasks.
	www.chemistryclasses.com /Lab/measurements_and_error.htm (189 words)

	JCE 1997 (74) 1357 [Nov] The Disappearing Liquid
		A one-liter (Pyrex) volumetric flask is modified by replacing the neck with a narrower tube (wide enough to permit insertion of a magnetic stirring bar) about 35 cm long, and adding a septum adapter to the side of the base.
		Slowly add water (also colored) to the bottom of the flask by means of a funnel attached by a rubber tube to a long glass tube (a 10-mL pipet would be suitable).
		When the volumetric flask has been filled to the top, the flow is stopped with a pinch clamp and the tube is gently removed.
	jchemed.chem.wisc.edu:8000 /journal/issues/1997/Nov/abs1357_1.html (461 words)

	[No title] (Site not responding. Last check: 2007-10-15)
		The volumetric flasks were inspected for cracks as well as cleanliness before being weighed as excess dirt or cracks may alter the data.
		Volumetric Flasks Hazards Care must be taken when handling the volumetric flask to avoid breakage.
		Conclusion From this experiment not only were the masses of volumetric flasks determined, the use of WordTM and ExcelTM were utilized to analyze and present the data as well.
	pigseye.kennesaw.edu /~jlc9868/research.doc (484 words)

	Glassware - Volumetrics
		Volumetric glassware or volumetric flasks are containers that have been calibrated to a specific volume.
		These flasks, unlike Erlinmeyer flasks or beakers, are marked with lines that are calibrated to a specific volume of liquid.
		A volumetric flask should be used whenever an accurate concentration of solution is required.
	www.chem.fsu.edu /chemlab/glassware/volumetrics.html (121 words)

	Solutions, Density, and Graphical Analysis
		The second use of the volumetric flask is to dilute a solution in a precisely known manner.
		Carefully transfer the entire sample to the volumetric flask (this is called a quantitative transfer); the wash bottle may be used to assist in this transfer.
		The volume of the volumetric flask is good to one decimal place and the volumes of the pipets to two decimal places.
	web.centre.edu /shiba/che132L/solutions.htm (1458 words)

	Chemical Volumetric Measurement
		A volumetric pipet is a glass tube used to accurateley deliver specific volumes.
		Volumetric measurements are another important part of a chemist's work with mass measurements.
		A volumetric measuring device is any container that will contain a known volume when filled to the mark.
	www.chem.arizona.edu /tpp/chemt/CSy/CSyVolumeMeasurement.htm (809 words)

	Volumetric Flasks (Site not responding. Last check: 2007-10-15)
		Volumetric flasks are used in the preparation of standard solutions.
		The flask must be filled with solvent so that the meniscus is aligned with the scribe mark of the flask.
		After use, the flask should be rinsed and filled with 0.1 M HCl.
	www.chem.vt.edu /chem-dept/long/acls/files/flasks.html (185 words)

	Body
		Volumetric flasks can be used wet, since you will be adding solvent anyway; pipets and burets are easier to rinse with the intended solution than to dry.
		slowly lift and rinse the outside stem of the funnel and the upper neck of the flask.
		Note that small volumetric flasks and pipets are less accurate than larger units.
	www.bgsu.edu /departments/chem/faculty/endres/chem407/volumetrics.htm (1694 words)

	Calibration of Vol. Glassware
		In this handout, volumetric flasks, pipets, burets, and graduated cylinders are discussed.
		Volumetric flasks are designed to contain a specified volume of liquid.
		Volumetric pipets are used to deliver precisely a single, definite volume of liquid.
	www.cwu.edu /~johansea/Chem251f03/Glasscalibr.htm (3008 words)

	ChemLab - Notebooks - Sample Write-up
		Subtract mass of empty flask from mass of filled flask to calculate mass of liquid.
		Limitations on the precision of the determination were the ability of the experimenter to correctly fill the volumetric flask, the accuracy of the flask itself, and the accuracy of the balance.
		Possible error by the experimenter that would account for the experimental precision being less than expected are not filling the flask to the mark properly or having droplets of liquid in the neck of the flask or on the outside of the flask.
	www.dartmouth.edu /~chemlab/info/notebooks/sample.html (466 words)

	Thomas Scientific - View Product
		These square design PYREX volumetric flasks have a width less than the widest diameter of the usual round flasks.
		Square flasks are easier to handle, require less space (15 - 20%) on the shelf and are ideal for sampling and storage.
		These Class A volumetric flasks have been manufactured to Class A tolerances as established by ASTM E- 694 for volumetric ware, ASTM E-542 for calibration of volumetric ware and ASTM E-288 for volumetric flasks.
	www.thomassci.com /product/33621 (142 words)

	Using a Volumetric Flask
		The volumetric flask must be cleaned and rinsed with solvent before use.
		Techniques for dissolving solute and diluting solution in a volumetric flask are presents.
		Techniques for filling a volumetric flask to the mark are demonstrated.
	jchemed.chem.wisc.edu /JCESoft/CCA/CCA6/MAIN/1ChemLabMenu/Measuring/Volume/VolumetricFlask/volflask_menu/MENU.HTM (80 words)

	Preparation of Standards for Dye Studies using Rhodamine WT
		The most accurate way to measure the tracer by volume is to fill a 10-ml volumetric flask to the mark, then rinse the tracer into a 1-liter volumetric flask.
		Volumetric flasks contain the stated volume, so if you want the stated volume out of the flask, you must rinse.
		The flask does not have to be dry to use it.
	www.turnerdesigns.com /t2/doc/appnotes/998_5111.html (3247 words)

	TNITRITE20_0 (Site not responding. Last check: 2007-10-15)
		After all the extractions are collected, dilute the volumetric flask to the line and mix.
		volumetric flask, transfer by pipette a 3 ml.
		volumetric flask and dilute to the line with distilled water.
	www.doh.dot.state.nc.us /Operations/dp_chief_eng/materials/Chemical/TNITRITE20_0.htm (1343 words)

	GENERAL PROCEDURES
		Volumetric glassware measures volume precisely, usually to four significant figures.
		Volumetric glassware is costly and should be treated with care.
		Difficult to remove precipitates that may form or reactions with the glass may occur when the solution is in contact with the glass for a long period of time.
	www.aug.edu /~chmsam/Chemistry2810/GENERALPROCEDURES.html (1923 words)

	Volumetric Flasks for Preparing Accurate Solutions
		Volumetric flasks are used in analytical chemistry to produce accurate solutions.
		However, a glass volumetric flask can also be used as decorative glassware for holding salad dressings, etc.
		Volumetric flasks are made to ISO 1402 standards and are class "B" accuracy.
	www.indigo.com /glass/volumetric-flasks.html (200 words)

	Carolina Chemistry - Practice problems
		Slowly add 33 mL of 3.0 M sulfuric acid to a 1000-mL volumetric flask half-filled with distilled or deionized water and swirl the flask to mix.
		Slowly add 25 mL of 5.0 M sodium hydroxide to a 500-mL volumetric flask half-filled with distilled or deionized water and swirl the flask to mix.
		To prepare a 1.0 N solution of magnesium hydroxide, slowly add 29 g magnesium hydroxide to a 500-mL volumetric flask half-filled with distilled or deionized water and swirl the flask to mix.
	www.carolina.com /chemistry/resources/practice_problems.htm (817 words)

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