Laboratory Equipment and Safety

Beaker Used to measure large quantities of liquids Read at eye level and at the bottom of the meniscus

What is a meniscus? The line formed by a liquid in glassware The wider the glassware the thinner the meniscus Read liquid levels from the bottom of the meniscus

Graduated Cylinder Used to measure small quantities of liquids Used when quantities need to be precise Read at eye level and at the bottom of the meniscus

Volumetric Flask Used when reactants must be measured extremely precisely Add solid reactant first then fill to the line with liquid reactant Read at eye level and at the bottom of the meniscus

Erlenmeyer Flask Used for carrying out experiment Never used for measuring liquids Never fill more than half way

Test Tube/Test Tube Rack Used to conduct an experiment using small quantities of reactants Are to remain in the test tube rack during experimentation

Triple Beam Balance Used to mass solid reactants Must be tarred prior to use Always use weigh paper; never place reactants directly on the plate

Hot Plate Used to heat liquids Never fill glassware more than half way when heating If a solid needs to be heated… Heat water in a large beaker Place the solid in a test tube Place the test tube in the large beaker

Microscope Used to look at very small objects

Laboratory Attire All students must wear: Goggles Apron Gloves All long hair or loose clothing must be secured prior to the start of lab

Safety Equipment Emergency shower Eye wash station First aid cabinet Used if chemicals get on large portions of your skin or clothing Eye wash station Used if chemicals get into your eyes Hold eyes open in stream of water until otherwise instructed by the teacher or nurse First aid cabinet Contains basic first aid supplies for minor injuries

Safety Equipment (cont’d) Fire extinguisher Used to put out fires on objects, not people To use: Pull the pin Aim nozzle at the base of the fire Squeeze the handle

Important Notes Always inform a teacher of an injury or accident immediately Allow the teachers to perform any necessary first aid In the event of an emergency, follow all directions the first time they are given