Monday, January 30, 2006

EXPERIMENTAL DESIGN

BURETTE
- for measuring volumes of liquids up to 1 decimal place
eg: 27.5 cm3, 36.2 cm3

PIPETTE
- for measuring fixed volumes of liquids
eg: 20.0 cm3, 25.0 cm3, 50.0 cm3
Cannot measure odd volumes.
eg: 28 cm3, 38.5 cm3

MEASURING CYLINDER
-for measuring volumes of liquids to nearest 1 cm3
eg: 23 cm3, 36 cm3

BEAKER
-for boiling liquids / containing liquids
Never use it to measure volumes!

COLLECTION OF GASES

-FOR HEAVY GASES : downward delivery

-FOR LIGHT GASES : upward delivery

-FOR INSOLUBLE GASES: displacement of water