Chemistry-Lab procedures

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

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