always wear------ and ------- to protect your eyes and clothing
saftey goggles and lab apron
never return used chemicals to
orginal containers
why are we never to put broken glass or chemicals in a regular trash can because
can cause harm to people taking out the trash by cutting or burning
when using a Bunson burner
confine loose clothing and tie back long hair
before lighting the Brunson burner make sure to:
confine loose clothing and hair, roll up sleeves, know location of fire extinguisher, safety shower, and sand bucket
if the flame is burning inside the base of the barrel
turn off gas at gas valve and don't tough the the burner it is extremely hot
do not touch chemicals with hands because
some chemical readily pass through skin into the blood stream
never place chemicals or hot objects directly on
scale or weighing pan
record mass of weighing paper to the nearest
.01 g
most of the clear, supernatant liquid above he solid may be poured off without disturbing the precipitate
decantation
as soon as you enter the lab what safety equipment should you put on
safety goggles and lab apron
before doing experiment what should you read and discuss with your teacher
all safety precautions and procedures
what type of flame is preferred in lab work and why
non- luminos
it burns hotter and cleaner
why should you never touch chemicals with your hands
corrosive; they can burn or harm your skin
what precaution can help prevent chemical contamination in reagent bottles
dont put used chemicals back in containers
list 3 pieces of equipment used in the lab for measuring small quantites. what is the correct procedure for filling a buret with liquid
graduated cylinder, buret, pipet
make sure liquid is at the tip
what is the rule about the size of filter paper to be used with the funnel
should be at least 1 cm from top of funnel
what should be checked before you leave the lab
everything should be clean and cooled in te correct place, gas turned off