2. General safety precautions
1. Know the location of emergency1. Know the location of emergency
equipment.equipment.
2. Be prepared to work. Read lab2. Be prepared to work. Read lab
and safety precautions thoroughlyand safety precautions thoroughly
before beginning.before beginning.
3. Do not eat or drink in lab.3. Do not eat or drink in lab.
3. Personal Precautions
1. Notify Mrs. Johnson of any health1. Notify Mrs. Johnson of any health
problems (ex. Allergies, asthma, etc)problems (ex. Allergies, asthma, etc)
2. Secure loose clothing.2. Secure loose clothing.
3. Tie long hair back3. Tie long hair back
4. If possible change contacts to4. If possible change contacts to
glasses.glasses.
4. Lab Preparation
1. Understand procedure and possible1. Understand procedure and possible
hazards involved with the lab.hazards involved with the lab.
2. Perform only the lab activities assigned.2. Perform only the lab activities assigned.
Do not do experiments of your own.Do not do experiments of your own.
3. Follow all instructions carefully.3. Follow all instructions carefully.
4. Always use the equipment described in4. Always use the equipment described in
the lab.the lab.
5. Safety glasses, apron and gloves should5. Safety glasses, apron and gloves should
be used when heating or working withbe used when heating or working with
chemicals.chemicals.
5. Lab Procedures
1. Work areas should be clean and1. Work areas should be clean and
neat at all times.neat at all times.
2. Keep combustible materials2. Keep combustible materials
away from open flames.away from open flames.
3. Never touch or taste something3. Never touch or taste something
unless told to do so.unless told to do so.
4. Never put your face near the4. Never put your face near the
mouth of a chemical container.mouth of a chemical container.
6. Lab Procedures cont’d
5. Any poisonous vapors should be5. Any poisonous vapors should be
in the hood.in the hood.
6. Dispose of waste materials6. Dispose of waste materials
appropriately.appropriately.
7. Clean and wipe dry all lab7. Clean and wipe dry all lab
surfaces at the end of lab class.surfaces at the end of lab class.
8. Report all accidents to the8. Report all accidents to the
teacher immediately.teacher immediately.
7. Handling Chemicals
1. Read and double check labels on1. Read and double check labels on
bottles.bottles.
2. Do not return unused chemicals back2. Do not return unused chemicals back
into original bottles.into original bottles.
3. Hold bottles away from body when3. Hold bottles away from body when
transferring a chemical from onetransferring a chemical from one
container to another.container to another.
4. When mixing water and an acid,4. When mixing water and an acid,
always add the acid to the water.always add the acid to the water.
8. Handling Chemicals cont’d
5. Avoid touching chemicals with5. Avoid touching chemicals with
hands.hands.
6. Check MSDS sheets of all6. Check MSDS sheets of all
chemicals you are working with.chemicals you are working with.
9. Handling Glassware
1. Do not used cracked, chipped, or1. Do not used cracked, chipped, or
badly scratched glassware.badly scratched glassware.
2. Never handle broken glass with bare2. Never handle broken glass with bare
hands.hands.
3. Allow plenty of time for hot3. Allow plenty of time for hot
glassware to cool before touching it.glassware to cool before touching it.
4. Always lubricate glassware before4. Always lubricate glassware before
inserting it into a stopper.inserting it into a stopper.
10. Heating Substances
1. Be very cautious when using a1. Be very cautious when using a
bunsen burner.bunsen burner.
2. Always turn burner off when not2. Always turn burner off when not
in use.in use.
3. Never heat anything without3. Never heat anything without
being told.being told.
4. Never look down into a4. Never look down into a
container that is being heated.container that is being heated.
11. Heating Substances cont’d
5. Do not burn anything unless5. Do not burn anything unless
instructed to do so.instructed to do so.
6. When heating a substance in6. When heating a substance in
a test tube, place the mouth ofa test tube, place the mouth of
the test tube away from you.the test tube away from you.
7. Never leave a substance that7. Never leave a substance that
is being heated unattended.is being heated unattended.
12. Safety Symbols and Lab
Equipment
1. Know the safety symbols that1. Know the safety symbols that
could be found on labels ofcould be found on labels of
chemicals and on labs.chemicals and on labs.
2. Know the common pieces of2. Know the common pieces of
lab equipment used in labs.lab equipment used in labs.
13. OSHA Occupational Safety and
Health Administration
Assures safety and health ofAssures safety and health of
America’s workers by settingAmerica’s workers by setting
standards, providing training andstandards, providing training and
education, and encouragingeducation, and encouraging
continual improvement incontinual improvement in
workplace safety and health.workplace safety and health.
14. When working in a lab…..
0%
0%
0%
0%
1.1. Tie up long hair.Tie up long hair.
2.2. Wear loose clothing.Wear loose clothing.
3.3. Wear contacts rather than glasses.Wear contacts rather than glasses.
4.4. Wear long sleeves to protect arms.Wear long sleeves to protect arms.
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15. Food may be brought into a lab
if…...
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25%
25%
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1.1. It is kept in your book bag.It is kept in your book bag.
2.2. It does not produce crumbs or waste.It does not produce crumbs or waste.
3.3. You do not eat it until finished.You do not eat it until finished.
4.4. It is in a metal lunch box.It is in a metal lunch box.
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16. You may taste a chemical
product of a reaction if…...
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25%
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1.1. Your lab tells you to.Your lab tells you to.
2.2. Your teacher tells you to.Your teacher tells you to.
3.3. You know what the substance is.You know what the substance is.
4.4. You dissolve it in water first.You dissolve it in water first.
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17. Your notebook accidentally
catches fire. You should…..
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25%
25%
25%
1.1. Notify your teacher first.Notify your teacher first.
2.2. Throw it on the floor and stomp.Throw it on the floor and stomp.
3.3. Remain calm.Remain calm.
4.4. Take it immediately to the hood.Take it immediately to the hood.
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18. After heating a flask it is best
to….
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25%
25%
25%
1.1. Cool it by immersing it in water.Cool it by immersing it in water.
2.2. Stand it on the lab table to cool.Stand it on the lab table to cool.
3.3. Place it on a wire gauze.Place it on a wire gauze.
4.4. Test its temperature by touching it.Test its temperature by touching it.
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19. You find a liquid chemical that
does not have a label. You
should….
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25%
25%
25%
1.1. Pour it down the sink.Pour it down the sink.
2.2. Give it to your teacher.Give it to your teacher.
3.3. Try to identify by smelling it.Try to identify by smelling it.
4.4. Find another bottle that looks theFind another bottle that looks the
same and assume that is it.same and assume that is it.
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20. To mix an acid with water
pour…..
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25%
25%
25%
1.1. Water into acid.Water into acid.
2.2. Small amounts of each into a 3rd.Small amounts of each into a 3rd.
3.3. Acid into water.Acid into water.
4.4. The liquid of smaller volume intoThe liquid of smaller volume into
the bigger.the bigger.
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