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Flashcards in Chapter 2 Deck (20)
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1

Hygroscopic Reagents

Rapidly absorb moisture from the air

2

Buoyancy

The upward force exerted on an object in a liquid or gaseous fluid.

3

True Mass

The mass measured in a vacuum.

4

Parallax

Error that occurs when your eye is not at the same height as the liquid [when reading volume in a graduated apparatus].

5

Volumetric Flask

Calibrated to contain a particular volume of solution at 20°C when the bottom of the meniscus is adjusted to the center of the mark on the flask's neck. 

6

Adsorption

Process in which a substance sticks to a surface.

7

Absorption

Process in which a substance is taken inside another (i.e. water taken into a sponge.)

8

Pipets

Deliver known volumes of liquid.

 

9

Transfer Pipet

Calibrated to deliver one fixed volume.

10

Measuring Pipets\

Calibrated to deliver a variable volume.

11

Micropipets

Deliver volumes of 1 to 1000 μL

12

Microliter Syringes

Come in sizes 1 to 500 μL and have an accuracy and precision near 1%.

13

Gravimetric Analysis

The mass of product from a reaction is measured to determine how much unknown was present.

14

Mother Liquor

Liquid from which a substance precipitates or crystallizes.

15

Filtrate

Liquid that passes through a filter.

16

Ignition

Heating at high temperature over a burner or in a furnace.

Used in some gravimetric procedures to convert a precipitate into a known, constant composition.

17

Slurry

A suspension of solid in liquid.

18

Desiccator

Closed chamber containing a drying agent.

19

Calibration

The process of measuring the actual quantity that corresponds to an indicated quantity on the scale of an instrument.

20

Ashless Filter Paper

Leaves little residue when burned