Chapter 2

Question 1

Hygroscopic Reagents

Answer 1

Rapidly absorb moisture from the air

Question 2

Buoyancy

Answer 2

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

Question 3

True Mass

Answer 3

The mass measured in a vacuum.

Question 4

Parallax

Answer 4

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

Question 5

Volumetric Flask

Answer 5

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.

Question 6

Adsorption

Answer 6

Process in which a substance sticks to a surface.

Question 7

Absorption

Answer 7

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

Question 8

Pipets

Answer 8

Deliver known volumes of liquid.

Question 9

Transfer Pipet

Answer 9

Calibrated to deliver one fixed volume.

Question 10

Measuring Pipets\

Answer 10

Calibrated to deliver a variable volume.

Question 11

Micropipets

Answer 11

Deliver volumes of 1 to 1000 μL

Question 12

Microliter Syringes

Answer 12

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

Question 13

Gravimetric Analysis

Answer 13

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

Question 14

Mother Liquor

Answer 14

Liquid from which a substance precipitates or crystallizes.

Question 15

Filtrate

Answer 15

Liquid that passes through a filter.

Question 16

Ignition

Answer 16

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.

Question 17

Slurry

Answer 17

A suspension of solid in liquid.

Question 18

Desiccator

Answer 18

Closed chamber containing a drying agent.

Question 19

Calibration

Answer 19

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

Question 20

Ashless Filter Paper

Answer 20

Leaves little residue when burned