LABORATORY SAFETY Wear the correct laboratory attire (lab. gown, safety goggles and mask) Avoid...
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Transcript of LABORATORY SAFETY Wear the correct laboratory attire (lab. gown, safety goggles and mask) Avoid...
LABORATORY SAFETY
• Wear the correct laboratory attire (lab. gown, safety goggles and mask)
• Avoid chemical spills on your working area.
LABORATORY SAFETY
• In smelling chemicals waft the vapors towards your face. Never sniff vapors directly.
• In removing the stoppers of reagent bottles hold it with between your fingers.
NEVER put it down on the working table.
LABORATORY SAFETY
• Segregate chemicals by compatibility groups for storage.
• Wash hands before leaving laboratory.
• Never mouth pipette anything in the lab.
FIRST AID
• FIRES
Small fires – wet towels; sand
Clothes on fire – safety blanket; stop, drop and roll
Building on fire –
keep calm; go to the nearest fire exit
FIRST AID
• SKIN CUTS – water; press blood; tincture of iodine (fresh wound only); sterile gauze/medicated band-aid
FIRST AID• SOLUTIONS/CHEMICALS a) Acid in eyes – wash with water; 2% solution of
NaHCO3; sterile gauze/cotton; olive oil b) any solution- water; saturated solution of boric acid; sterile gauze; olive oil
FIRST AID
• Minor burns – COLD water; boric ointment or sterile petroleum jelly
• ALKALI burns – large amt of water; 5% solution acetic acid; boric ointment/petroleum jelly
FIRST AID
• ACID burns – running water; saturated solution of NaHCO3 for 20 mins.; wash with water; sterile gauze
• Heat burns – water; Vaseline burnt ointment
FIRST AID
• FAINTING – lie down victim (head in level with his body); loosen tight clothing; aromatic spirit of ammonia
Laboratory Equipments
• Things that you will use in the Chemistry Laboratory.
BURET / BURETTE
• A glass tube with fine gradations and a stopcock at the bottom, used especially for accurate fluid dispensing and measurement.
BURET / BURETTE CLAMP
• This metal tool attaches to a ring stand to hold a single burette, test tube, flask, etc.
DESSICATOR
• are sealable enclosures containing desiccants used for preserving moisture-sensitive items.
• use for desiccators is to protect chemicals which are hygroscopic or which react with water from humidity.
THISTLE TUBE
• a piece of laboratory glassware consisting mostly of a shaft of tube, with a reservoir and funnel-like section at the top.
• used by chemists to add liquid to an existing system of apparatus.
• it allows insertion through a small hole present in some stoppers, permitting the tube to be inserted into a flask, such
as an Erlenmeyer flask.
FUME HOOD
• A laboratory equipment used to limit a person's exposure to hazardous and/or unpleasant fumes.
SEPARATORY FUNNEL
• s a laboratory glassware used in liquid-liquid extractions to separate (partition) the components of a mixture between two immiscible solvent phases of different densities
CRUCIBLE
• a heat-resistant container in which materials can be heated to very high temperatures.
NICHROME WIRE
• Used because of its ability to withstand the high temperatures
BUNSEN BURNER
• produces a single open gas flame, which is used for heating, sterilization, and combustion.
TIRRIL BURNER
• Used for heating materials or substances
MEKER BURNER
• laboratory gas burner that has:
a) constriction in the tube
b) grid at the top of the burner • the flame of burning gas
to consist of a number of short blue inner cones and a large single outer cone and to be hotter generally than the flame of a Bunsen burner
C CLAMP
• Used for gripping variously shaped work pieces in varying positions.
UTILITY CLAMP
• When attached to the ring stand, this clamp is used to hold a large test tube or Florence flask above the lab table.
RING CLAMP
• They come in several sizes and have a multitude of uses: supporting a glass funnel in filtration, support for a gauze which in turn holds a beaker or flask.
ERLENMEYER FLASK
• Used to hold liquids and carry out chemical reactions. It is not used when accurate measurements are required.
FLORENCE FLASK
• Also known as a boiling flask. It can be used as a container to hold solutions of chemicals. It is designed for uniform heating and ease of swirling.
BEAKERS
• Used to hold and liquids. If graduated, it can serve to make approximate measurements of liquid volume.
GRADUATED CYLINDER
• Used to accurately measure out volumes of objects
VOLUMETRIC FLASK
• used in analytical chemistry for the preparation of solutions.
• used for making up solutions to a known volume.
REAGENT BOTTLES
• A glass container to hold liquid chemicals
MEDICINE DROPPER
THERMOMETER
• a device that measures temperature
IRON STAND
• used to hold or support glassware during experiments.
TRIPOD
• a three-legged rack used for support in heating setups.
WIRE GAUZE
• a fine mesh of thin wires woven closely together used in heating setups
MORTAR & PESTLE
• Used to crush & grind substances. The pestle is a heavy stick whose end is used for pounding and grinding, and the mortar is a bowl.
EVAPORATING DISH
• Used for heating things over a burner. Often placed on a ring (on an iron stand) or on a wire mesh on a ring.
WATCH GLASS
• Used as a cover for a beaker or to contain a small amount of a chemical.
PIPET / PIPETTE
• Used to measure small amounts of solution very accurately. A pipet bulb is used to draw solution into the pipet
STIRRING ROD
• used to stir liquids in flasks or beakers.
TEST TUBE
• Use as a container for various materials
TEST TUBE BRUSH
• Used to clean the inside part of a test tube.
TEST TUBE HOLDER
• Used to hold test tubes
GLASS FUNNEL
• Used in filtration processes
WASH BOTTLE
• used to rinse glassware in the chemistry lab. It is NOT used to rinse your eyes!