labratory equipment Flashcards
What is a beaker? (def)
A wide open container with a flat bottom (made out of glass or plastic)
What is a beaker used for?
Used to mix, heat, or hold substances
What does a graduated beaker do
Give approximate measurements of liquid volumes
The top rim of a beaker has a ____ and a ____ indentation that allows liquids to be easily poured from it
lip
curved
What is a flask? (definition)
a glass container with a thin neck and a rounded base
What are flasks used for?
To measure, heat, or store liquids
What does the neck of the flask allow?
Clamps to be attatched or stoppers to be placed
List the three different types of flask
- erlenmeyer flask
- florence flask
- volumetric flask
Describe an erlenmeyer flask (3)
- cone shaped base
- often used during filtration/titration
- wide bottom allows liquids to be heated quickly
which type of flask is often used in the processes of filtration and titration?
(process where solid particles removed from fluid by filter medium/process where a solution with a known ratio of parts is used to determine how much of a part there is in another solution)
Erlenmeyer flask
describe a florence flask (3)
- round/spherish flask with a rounded or flat base.
- liquid contained heats evenly due to shape
- stronger than other flasks.
Which flask is used to boil liquids for distillation (liquid vaporized then condensed for separation) processes and can handle extreme temps/temp changes?
florence flask
Describe a volumetric flask (3)
- pear shaped/raindrop base, long neck
- usually with a stopper
- always marked to hold a specific amount, and only that amount
Which flask is used to accurately measure liquids to a fixed volume or to create solutions with fixed volumes?
Volumetric flask
What is a test tube? (definition)
A cylinder glass tube with a rounded bottom
What is a test tube used for?
Holding or heating small amounts of a substance
How is a test tube held?
Held upright using clamps or test tube holders
What is a buret/burette?
long glass cylinder used to measure and dispence an amount of liquid
What does a burette look like?
Cylinder open at top, bottom comes together into tip. Stopcock valve attatched to bottom, above tip, which regulates amount of liquid flowing
Burettes are often used for _____ with an Erlenmeyer flask below the tip of the buret,
titrations
What is a graduated cylinder?
A tall cylinder used to measure volume of a liquid
Volume of a liquid in a graduated cylinder is measured from the _____
bottom of the meniscus
What is a meniscus?
An inward curve at a liquid’ surface
What are graduated cylinders often used to measure besides liquids?
The volume of an irregular solid (through displacement)