ChemLab

Meniscus

what you look for at eye level to avoid parallax (graduated cylinder)

Length

measured using a metric ruler, typically in centimeters(cm)

Volume

using graduated cylinders, beakers, pipets with units in mill

Bunsen Burner

• laboratory device to produce controlled flame by mixing flammable gas, typically natural gas or propane with air before ignition

• invented by German Chemist Robert Bunsen in 1855

• 1,500 degrees celcius (2700F) hottest point

Base

provides stability and support

Barrel(Chimney)

vertical tube where gas and air mix. 5-6 inches long

Collar(Air Regulator)

located at base allows adjustment for air intake influencing flame temperature and color

Air Holes

openings that permit air to enter barrel facilitating combustion

Gas Valve

controls the flow of gas into burner

Gas Nozzle

connects gas supply, allowing gas to enter burner

Yellow Flame

low air supply indicating incomplete combustion and lower heat

Reddish Flame

slightly more air indicating incomplete combustion

Purple Flame

intermediate air supply

Blue Flame

High air supply, indicating complete combustion and maximum heat output reaching temperature up to 1500C(2700F) or more depending on burner type