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LANGUAGE OF THE LAB Using Laboratory Tools Properly! STORAGE BEAKERS • Used for containing liquids. • Scale printed on the glass is just an estimation---not accurate, and not used for measuring out precise amounts of liquids! • Can be heated. ERLENMEYER FLASKS • Used for storing liquids. • Narrow neck allows for easy storage, it can be closed using either a cork or parafilm! • NOT used for measuring! The amounts printed on the flask is highly inaccurate and only allows for the estimation of amounts! TEST TUBES • Used to contain, mix, and store small amounts of liquids • Not used for measurement of liquids • Not accurate MICRO-CENTRIFUGE TUBES • Used to store and centrifuge very small amounts of liquids. • Not used for measurement. MEASURMENT GRADUATED CYLINDER • Used for Measuring liquid amounts with an accuracy of a tenth of a mL. • Good for relatively large amounts of liquids when precise accuracy is not needed! BURET • Allows for precise and accurate dispensing of solutions. • Accurate to 1/100th of a mL • Used in titrations to evaluate the PH of an unknown solution. PIPETTES • Micropipettes—used to precisely dispense small amounts (microliters) of liquid. • Pipettes—used to precisely dispense milliliters of a solution. • Disposable Pipettes—used for transferring liquid, not accurate! TOOLS MICRO-CENTRIFUGE • Used to mix small amounts of liquid • Must be balanced just like the large version used in chemistry HEATING • Hot Plate—Used to heat up solutions. Hard to maintain a specific temperature! • Hot Water Bath—Used to heat up solutions at a precise and constant temperature! POWER SOURCE AND GEL ELECTROPHORESIS CELLS • Power Source used to run a consistent and known amount of voltage through a electrophoresis cell • Gel Electrophoresis Cell—is used to separate molecules based on charge, size, and shape