Goggles should be worn because: - ANSWER --The inexperience of the users
increases the chance of splashes and chemical spills
--The number of students working in the lab increases the chances of collision
and subsequently chemical splashes
--They protect from flying objects such as broken shards of glass
--They provide maximum protection from chemicals spilled or splashed in the
eyes
To maintain a safe working environment in the laboratory it is important for
each student to: -
ANSWER Familiarize themselves with safe handling procedures for every
chemical being used
Clean up spills immediately after they occur
Learn where the safety equipment is located in the lab room
Keep the aisles between benches clear of tripping hazards such as knapsacks or
unused stools
, Liquid dripping down the sides of bottles is a safety hazard because: -
ANSWER It leaves "bottle ring" spills which might damage or react with the
bench surface
It makes the bottle slippery and raises the chances of dropping it
It could be dangerous for a subsequent user to touch
Fire safety in the First Year Chemistry lab requires that each student learn the
location of: - ANSWER The nearest fire alarm pull station
The nearest fire extinguisher
The fire exit route from the room and building
Which of the following precautions should be taken to ensure that all of the
initial copper is recovered? - ANSWER Do not spill solutions during transfer
Stir constantly when boiling to avoid bumping
Solids that adhere to beakers can be poured into the next solution
If isolating a solid product by vacuum filtration from a liquid, what is the
maximum depth of solution that is added to the Buchner funnel? - ANSWER
two-thirds of depth of funnel
In the operation of vacuum filtration, what is the "filtrate"? - ANSWER the
liquid pulled into the flask
what is bumping? - ANSWER The formation and subsequent bursting of large
air bubbles trapped under a layer of solid precipitate in solution
increases the chance of splashes and chemical spills
--The number of students working in the lab increases the chances of collision
and subsequently chemical splashes
--They protect from flying objects such as broken shards of glass
--They provide maximum protection from chemicals spilled or splashed in the
eyes
To maintain a safe working environment in the laboratory it is important for
each student to: -
ANSWER Familiarize themselves with safe handling procedures for every
chemical being used
Clean up spills immediately after they occur
Learn where the safety equipment is located in the lab room
Keep the aisles between benches clear of tripping hazards such as knapsacks or
unused stools
, Liquid dripping down the sides of bottles is a safety hazard because: -
ANSWER It leaves "bottle ring" spills which might damage or react with the
bench surface
It makes the bottle slippery and raises the chances of dropping it
It could be dangerous for a subsequent user to touch
Fire safety in the First Year Chemistry lab requires that each student learn the
location of: - ANSWER The nearest fire alarm pull station
The nearest fire extinguisher
The fire exit route from the room and building
Which of the following precautions should be taken to ensure that all of the
initial copper is recovered? - ANSWER Do not spill solutions during transfer
Stir constantly when boiling to avoid bumping
Solids that adhere to beakers can be poured into the next solution
If isolating a solid product by vacuum filtration from a liquid, what is the
maximum depth of solution that is added to the Buchner funnel? - ANSWER
two-thirds of depth of funnel
In the operation of vacuum filtration, what is the "filtrate"? - ANSWER the
liquid pulled into the flask
what is bumping? - ANSWER The formation and subsequent bursting of large
air bubbles trapped under a layer of solid precipitate in solution
