Glassware & Testing Apparatus

Question 1

Analytical Balance

Answer 1

Precision scale with glass enclosed pan and digital readout. Determines mass to 4 decimal places (1 ten-thousandth of a gram)

Question 2

Beaker

Answer 2

Open top, uniform width with pour spout. Used for holding samples or transferring solutions. Not used for specific measurements.

Question 3

Buret

Answer 3

Open top, long and narrow with precise graduations and a stopcock. Hold solutions used in titration to deliver precise amounts.

Question 4

BOD Bottle

Answer 4

Ground glass neck with a stopper, 300mL volume. Holds sample and dilution H20 for BOD or DO.

Question 5

Buret Stand

Answer 5

Heavy rectangular base with upright rod and pinch clamps. Holds burets during titration.

Question 6

Crucible

Answer 6

(Common brands include Gooch or Coors). Open top ceramic vessel with tapered profile and perforated bottom. Used with glass fiber filter to capture TSS while passing TDS. Capable of heating to 600°C.

Question 7

Crucible Tongs

Answer 7

Scissor-like metal clamp used for picking up crucible or evaporating dish.

Question 8

Evaporating dish

Answer 8

Open top ceramic bowl used for holding samples during low temperature evaporation and high temperature drying and firing. Up to 600°C.

Question 9

Desicator

Answer 9

Thick glass jar with ground glass flange and cover. Stopcock grease seals cover. Cooling rack with desiccant below. Allows hot dry vessels to cool without collecting moisture.

Question 10

Drying Oven

Answer 10

Air convection electric heat driven oven with thermostat and thermometer. Used for evaporating or drying samples. Typical range is Room temperature to 200°C.

Question 11

Erlenmeyer Flask

Answer 11

Named after Emil Erlenmeyer. Open top inverted funnel shaped glass used to hold samples and reagents during analysis. Not used for specific volume measurements.

Question 12

Eye dropper

Answer 12

Plastic or glass with bulb end used for taking up and dispensing small amounts of reagent, titrant, or sample. Some are graduated for approximate measurements.

Question 13

Graduated Cylinder

Answer 13

Open top glass cylinder with wide base and precise graduations used to accurately measure specific volumes of sample or reagent solutions.

Question 14

Pipet

Answer 14

Open top thin glass tubes with precise graduations. Used for taking up specific quantities of sample or reagent.

Question 15

Volumetric pipet

Answer 15

Open top thin glass tube with bulbous middle section and one graduation mark. Used to dispense one specific volume.

Question 16

Pipet Bulb

Answer 16

Rubber bulb with or without valves used to supply suction to pipet

Question 17

Stir Jack/Heater

Answer 17

“Hot Plate” with rotating internal magnet. Used to stir sample solutions with a stir bar placed in the beaker or flask.

Question 18

pH meter/Probe

Answer 18

Electronic meter with digital readout used to determine pH