GlasswareGlassware

Bioscience, Equipment Unit

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BellworkBellworkYou need to make a cake for your

friend’s birthday. What pans or bowls will you use to make the cake? Why did you select those particular pans or bowls?

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PurposePurposeIn order to accurately complete

any of the labs in this class you will need to be able to select appropriate glassware based on the volume of liquid you will be using or mixing.

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ObjectivesObjectives

Identify laboratory glasswareSelect appropriate glasswareUse laboratory glasswareMaintain control inventory for

glassware

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TerminologyTerminologyGraduated CylindersVolumetric FlasksMeasuring pipettesBeakersErlenmeyer FlasksPasteur pipettes

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PredictPredict

PROPERTY OF PIMA COUNTY JTED, 2010 6

Why would you Why would you not want to use a not want to use a bucket to measure bucket to measure

a cup of water?a cup of water?

Be prepared to Be prepared to shareshare

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Graduate cylinderGraduate cylinderDescription: a narrow cylinder

shaped piece of equipment with incremental measurements.

Types: 10ml, 25ml 50ml, 250ml, 500ml, 1000mlUsed to: measure used to measure in the range of 10-2000ml

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7yoy.8o4.zirveiletisim.net - image source

Volumetric FlaskVolumetric FlaskDescription: Have a round base

and narrow neck. Calibrated with more accuracy than a graduated cylinder

Types: 100ml, 250ml, 500ml, 1000ml Used to: measure a set Volume very accurately

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http://www.myenvirolab.com/products.asp?prodtype=30- image source

Measuring PipettesMeasuring PipettesDescription: long narrow glass

pipette. Incremental measurements

Common Types:1ml, 10ml, 25 mlUsed to: measure volumes between

1-25 ml

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Page: http://www.proscitech.com.au/cataloguex/online.asp?page=l4

BeakersBeakersDescription:Types:Used to:

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www.labsafety.com- image source

Erlenmeyer FlaskErlenmeyer FlaskDescription: Glassware with a cone base

shape and a narrow openingCommon Types: 25ml, 50ml, 100ml,

250ml, 1000mlUsed to: Not as accurate at the

graduated cylinders and volumetric flasks. These should not be used when accurate measurements are needed

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http://qwickstep.com/search/buy-erlenmeyer-flask.html- image source

Pasteur PipettePasteur PipetteDescription: Similar to an eye

dropperCommon Types: glass, disposable.

1ml, 0.5 ml, 2ml, 3mlUsed to: Transfer small volumes of

liquid. They are used to dispense liquid, but not to measure exact volumes.

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http://www.appletonwoods.co.uk/acatalog/Plastic_Pasteur_Pipette.html

Equipment LogEquipment LogIn each lab table there is a log of

all equipment. If glassware breaks note the date

of the incident in the appropriate column.

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Equipment Date of use

Date of breakage

50ml beaker

ClosureClosure

How would you summarize to a friend who was absent today what you learned about glassware today?

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