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21 Cards in this Set
- Front
- Back
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Tare
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setting the balance reading to 0 when an empty vessel or weighing paper is placed on the pan
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Weigh by Difference
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weigh the reagent bottle before and after removing the sample
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Hygroscopic Reagents
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chemicals that rapidly absorb moisture from the air
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Buoyancy
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apparent mass of a weighed object is less than the true mass because of the air displaced by the object
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Tolerance
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allowable deviations for laboratory equipment
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Buret
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precisely manufactured glass tube with graduations enabling you to measure the volume of liquid delivered through the stopcock at the bottom
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Meniscus
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the curved surface of a liquid
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Parallax
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the apparent displacement of an object when the observer changes position
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Volumetric Flask
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a flask having a tall, thin neck with a calibration mark indicating the volume of liquid contained
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Adsorption
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the process in which a substance sticks to a surface
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Acid Wash
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soak glassware in HCl to remove trace cations that have been taken in and replace with H+
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Absorption
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the process in which a substance is taken inside another
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Pipet
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a glass tube calibrated to deliver a fixed (volumetric or transfer) or a variable (measuring) volume of liquid
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Filtration
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process of removing a solid from a liquid
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Mother Liquid
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liquid from which a substance precipitates or crystallizes
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Filtrate
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liquid that passes through a filter
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Ashless Filter Paper
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Specially treated paper that leaves negligible residue after ignition
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Ignition
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heating at high temperature to convert a precipitate into a known constant composition
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Desiccator
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a closed chamber containing drying agent
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Desiccant
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drying agent, absorbs H2O
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Calibration
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process of measuring the actual quantity that corresponds to an indicated quantity on the scale of an instrument
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