Safety & MSDS & Equipment

Safety & MSDS & Equipment Process skills: C.1A demonstrate safe practices during laboratory and field investigation; C.1B know specific hazards of chemical substances

Safety Rules • Read lab and be familiar with safety issues. • Tie back long hair, roll up sleeves, wear closed toe shoes, and put on goggles and apron. • Never eat, drink, or apply make-up in lab. • Do not use burners near flammable materials. • Always point test tube away from you and others when heating chemicals. • Never directly inhale a gas or vapor. • Always add acids or bases to water when making dilutions. (A&W rootbeer) • Never use electrical equipment near water. • Report accidents to your teacher ASAP. • Wear a hat, long sleeves, and closed-toed shoes during field investigations.

SAFETY- Vocabulary • Carcinogen – causes cancer • Corrosive – gradually destructive • Ventilation – circulate fresh air • Irritant – causes redness & itching, burning & is harmful • Oxidizer – combines with oxygen and burns • Toxic – poisonous • Flammable – possible to burn • Fumes – vapor, gas, or smoke that can be harmful • Radioactive – damages tissues by removing electrons or breaking bonds

Chemical Symbols • Chemical Safety Symbols • Flammable • Corrosive • Environmental Hazard • Poisonous • Radioactive

MSDS There is an MSDS sheet for every chemical which gives: • Physical data: density, solubility, pH, etc. • Appearance and odor • Reactivity • Health hazards • Special precautions: gloves & goggles • First aid

NFPA Diamond • Used to identify hazards using graphic representation • Used on chemical labels, buildings and transports

Laboratory Equipment Equipment Purpose_____ ____________________________ Beaker measures liquid volume in a wide mouth container Burette dispenses precise liquid amounts via a vertical tube Electric Balance measures mass; can “tare” (rezero) Erlenmeyer Flask holds liquids; conical base and cylindrical neck allow liquids to be stoppered or swirled Graduated Cylinder measures liquid’s volume; more precise than beakers Pipettetransfers small liquid amounts using a thin tube Test Tube holds chemicals; glass tube with one open end Thermometer measures the temperature (kinetic energy) of substance (C or K) Volumetric Flask holds liquids; provides a precise measurement of a single volume (L or mL) Match Pictures with Equipment Name:

1. All of these procedures must be followed when using the setup shown above except — a. putting on safety goggles b. handling the beaker with tongs c. securing loose clothing d. wearing rubber gloves

1. All of these procedures must be followed when using the setup shown above except — • d. wearing rubber gloves

2. A science class is conducting an experiment that produces noxious fumes. Because of inadequate ventilation, some students begin to feel nauseated and dizzy. The first response should be to — A neutralize the acid that is reacting to produce the noxious fumes B carry the reactants outside, away from other students C leave the room and go to an area with fresh air D spray the reaction with a fire extinguisher

2. A science class is conducting an experiment that produces noxious fumes. Because of inadequate ventilation, some students begin to feel nauseated and dizzy. The first response should be to — C leave the room and go to an area with fresh air

3. An experiment requires the use of a lab apron, goggles, and insulated mitts or beaker tongs. The purpose of these safety items is primarily to protect against — a. release of hazardous gases b. contamination of chemicals and glassware c. hot materials and spills of harmful liquids d. staining of lab clothing

3. An experiment requires the use of a lab apron, goggles, and insulated mitts or beaker tongs. The purpose of these safety items is primarily to protect against — c. hot materials and spills of harmful liquids

4. Which of the following is the proper method to dispose of a solid produced during a chemical reaction? a. Wrap the solid in paper, seal it in a bag, and throw it in the trash b. Place the solid in the designated container for solid waste c. Dissolve the solid in a solvent and pour the solution down the drain d. Carry out a reaction that will convert the solid into a gas under a fume hood

4. Which of the following is the proper method to dispose of a solid produced during a chemical reaction? b. Place the solid in the designated container for solid waste

5. Which of these is the best reason to not eat or drink while in the laboratory? a. Particles of food can contaminate chemical reagents. c. Some foods produce toxic gases when mixed with acids. b. Spilled drinks can make cleanup of chemicals difficult. d. Chemicals spilled on hands can be transferred to food.

5. Which of these is the best reason to not eat or drink while in the laboratory? d. Chemicals spilled on hands can be transferred to food.

6. The anatomy of grasshoppers is being studied in a dissection lab. Working in groups of three, students make observations using a hand lens, forceps, and a scalpel. Two of the students in a group have finished their observations. These two students may do all of the following except — • remove their goggles • review their notes • wash their hands • assist their lab partner [Default] [MC Any] [MC All]

6. The anatomy of grasshoppers is being studied in a dissection lab. Working in groups of three, students make observations using a hand lens, forceps, and a scalpel. Two of the students in a group have finished their observations. These two students may do all of the following except — • remove their goggles [Default] [MC Any] [MC All]

7. This picture indicates that the chemical represented is — • Pressurized • Corrosive • Flammable • Toxic

7. This picture indicates that the chemical represented is — B. Corrosive

8. A science class is conducting an experiment that produces noxious fumes. Because of inadequate ventilation, some students begin to feel nauseated and dizzy. The first response should be to — • neutralize the acid that is reacting to produce the noxious fumes • carry the reactants outside, away from other students • leave the room and go to an area with fresh air • spray the reaction with a fire extinguisher

8. A science class is conducting an experiment that produces noxious fumes. Because of inadequate ventilation, some students begin to feel nauseated and dizzy. The first response should be to — C. leave the room and go to an area with fresh air

9. Reactions that produce toxic gases should be performed in a — • laboratory fume hood • beaker with a watch glass on top • well-ventilated area of the lab • warm, airtight drying oven

9. Reactions that produce toxic gases should be performed in a — • laboratory fume hood

10. The label shown above contains information about some harmful effects of acetone. A group of students plans to use acetone to rinse out a glass container. A second group of students is working at the same lab table. Which of the following lab procedures should the second group of students avoid? • Heating water with an open flame • Pouring hydrochloric acid into a beaker • Filtering precipitates from a liquid solution • Collecting oxygen from plants in a test tube

10. The label shown above contains information about some harmful effects of acetone. A group of students plans to use acetone to rinse out a glass container. A second group of students is working at the same lab table. Which of the following lab procedures should the second group of students avoid? • Heating water with an open flame

11. For safety reasons, which of these labels is the most important to have on a reagent bottle? • p • P • P • a

11. For safety reasons, which of these labels is the most important to have on a reagent bottle? C.

13. Classification symbols for certain fire extinguishers are shown below. Which class of fire extinguisher should be used when a hot plate overheats and catches on fire? A B C D

13. Classification symbols for certain fire extinguishers are shown below. Which class of fire extinguisher should be used when a hot plate overheats and catches on fire? B

Safety & MSDS & Equipment