MATERIAL
DEFINITIONS
- To protect the eyes. Safety goggles.
- For measuring temperature. Thermometer.
- For cleaning the inside of a test tube.wire brush.
- For measuring mass. Watch glass.
- For removing and holding a hot beaker. Tongs.
- To protect the bottom of a beaker or flask from the flame; to support a beaker or flask on a ring clamp. Wire gauze.
- For holding a flask, a beaker, or a test tube o a ring stand. Iron ring.
- For holding an individual test tube. Test tube holder.
- For holding one or more test tubes. Test tube rack.
- For measuring and pouring liquids; not for heating or mixing substances. Erlenmeyer flask.
- For measuring and pouring liquid; for heating or mixing substances. Beaker.
- To aid in pouring a liquid from a wide mouth container to a small-mouth container; to filter substances when the filter paper is used: Funnel.
- For heating a small amount of substance: Test tube.
- For measuring length or distance: Measuring tape.
- For transferring a small amount (drops) of liquid: Dropper, Micropipets.
- For plucking or handling small objects: Forceps.
- To mix or stir substances; made of glass to resist heat, stains, corrosion: gas bottle or baker.
- For heating, sterilisation, and combustion: Bunsen burner.
- For stirring: Spatula.
- For pulling liquid into a pipette: Micropipets.
- For holding solids while being weighed, or as a cover for beaker. Spatula.
- For making up solutions to a known volume: Gas bottle.
1. Holding 1000mL of water: Graduated cylinder.
2. Measuring 27ml of Liquid: beaker.
3. Measuring exactly 43mL of an acid. Dropper.
4. Massing out 120g of sodium chloride. Buret.
Explain what do they mean and put two examples of each label.
EXPLOSIVE: Substances that made explode under definite conditions. Avoid shock, friction, sparks and heat.
HARMUL: Substances that when taken up by the body cause slight damage. Avoid contact with the human body, including inhalation of the vapours.
TOXIC: Substances that very hazardous to health when breathed, swallowed or in contact with the skin and may even lead to death.
CORROSIVE: Substances that can destroy living tissue as well as equipment. Do not breathe vapours and avoid contact with skin, eyes and clothing.
IRRITANT: Symbol that designates substances that may have and irritant effects on skin, eyes and respiratory organs. Do not breathe vapours and avoid contact with skin and eyes.
HIGHLY FLAMMABLE: Spontaneously flammable substances. Avoid contact with air. Highly flammable gases and flammable liquids. Keep away from open fires, sources of heat and sparks.
OXIDISING: Substances that can ignite combustible material or worsen existing fires and thus make firefighting more difficult. Keep away from combustible material.
