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!