CHE 232 Final-- Lab Safety

What is best suited to extinguish the following fires: 1 small benchtop fire 2 large fire on floor 3 clothing fire

1 overturned beaker 2 fire extinguisher 3 fire blanket

Move to the safety shower if you spill hazardous chemicals on your [Blank 1] Stand under the shower and [Blank 2] Remove clothing and continue flushing the area for [Blank 3]

1. skin or clothing 2. pull 3. 15 minutes

A student removes a chemical sample from a reagent bottle to be used in an experiment. What should he do with any excess chemical remaining from this sample after the experiment is complete?

Check and see if anyone else can use the chemical. If not, discard in the proper waste container.

When should you start a new chemical waste container in the lab?

When the contents of the current container are a couple inches below the brim of the container

What information does not need to be included a chemical waste label?

A description of the experiment the chemicals were used for

Using the letters on the image, identify each component of the liquid waste set-up.

A. Funnel B. Primary container C. Waste label D. Secondary Container

What are the best practices for safely handling waste in the lab?

Always wear appropriate Personal Protective Equipment and Check labels or instructions before any disposal.

Determine when to put on disposable gloves for work in the lab.

Before handling any glassware or chemicals for the experiment

Identify the precautions to take with exits in the lab.

Locate the exits prior to the start of lab Do not block a door with an EXIT sign

What information is needed in order to be prepared for an emergency?

Location of all exits, Understanding of where to go should an emergency occur, Location of lab phone and first aid kit, and Contact information for emergency personnel

Why should Bunsen burners not be used when heating organic materials?

Many organic materials are flammable and could cause a fire.

It is often helpful to remember the acronym PASS when using a fire extinguisher. Fill in the word that corresponds with each letter to complete the steps needed for operation of this device.

P: Pull the pin A: Aim the nozzle at the base of the fire S: Squeeze the lever slowly S: Sweep the spray from side to side over the fire

What is generally the best approach when liquid from a large reagent bottle is needed in an experiment?

Pour some of the reagent from the bottle into a beaker, then use as needed in the procedure.

What does the NFPA diamond look like?

Red: Fire Hazard Yellow: Reactivity Hazard White: Specific Hazard Blue: Health Hazard

What should you do every time before you leave the lab?

Remove your labcoat, if you are wearing one, Wash your hands, and Remove your gloves.

What should you do after finishing work with a reagent bottle?

Return the bottle to its proper storage location and Close the bottle.

Which steps are necessary for cleaning a spill involving broken glass?

Stop the spread of the spill, soak up any spilled liquid with absorbent material, and pick up large pieces of glass with gloved hands

Read each statement regarding food and beverages in the lab and determine if each is true or false. Tobacco products of all kinds are prohibited in lab Food items should not be brought into the lab Beverages are allowed in lab as long as they are in containers with lids. Chewing gum is okay in the lab as long as you don't blow bubbles.

True True False False

What is the main precaution to take if a Gas Cylinder sign is present in the lab?

Visually check that the gas cylinder is restrained but keep a safe distance from it.

Determine the safest option in the lab if you need your vision to be corrected.

Wear corrective glasses or lenses under your safety goggles for the whole experiment, but always check with your TA or Instructor for your school's policy

Determine when you should remove your goggles in the lab room.

When everyone in the room is done handling any chemicals or glassware

Determine which items of personal protective equipment (PPE) you will likely use in a general chemistry lab.

gloves, labcoat, goggles, NOT face shield, face mask, or headphones

Match each lab incident to the item of PPE that will protect you from it. Each item of PPE will only be used once. While pulling an empty beaker off the shelf at the beginning of lab, it slips out of your hand onto the floor. While transferring a solution from a flask to a beaker, the solution accidentally spills down the front of the lab bench. While picking up a buret, an unknown solution left by a previous solution drips onto your hand. While checking on a stirring solution, the solution splashes up towards your face.

1. Closed-toe shoes 2. lab coat 3. gloves 4. goggles

Which sections will the following information be in, in an SDS... 1. recommendations in case of accidental contact with the chemical 2. incompatibility or reactivity with other chemicals 3. chemical name and formula 4. recommended personal protective equipment (PPE) 5. possible dangers and health effects

1. First aid measures 2. Handling and storage 3. identification 4. exposure controls/ personal protection 5. hazards identification

If you drop or break glassware in the lab, first [Blank 1]. Then, [Blank 2] Finally, place all that material into the [Blank 3]

1. Get thick gloves or dustpan 2. Carefully collect all the broken glassware 3. Broken glass container

Changing gloves often will minimize the spread of chemicals. To properly remove gloves, first, [Blank 1] and then, [Blank 2] Then insert [Blank 3] between the interior edge of the second glove and the skin, and remove the second glove.

1. Grasp the exterior of one glove with a gloved hand 2. peel off the first glove 3. a bare finger

What is best course of action if the following exposures occur to hydrogen peroxide... 1. If inhaled 2. In case of skin contact 3. If swallowed 4. In case of eye contact

1. Move person to fresh air 2. Take off any contaminated clothing and rinse thoroughly 3. Rinse mouth with water 4. Rinse with water for 15 minutes

Where should each type of waste be disposed: 1. Titrant solution 2. Broken flask 3. Syringe Tips 4. Unused solid reagent

1. Nalgene bottle with cap 2. Box lined with puncture resistant bag 3. Sharps Container 4. Solid waste container

Most chemicals can be cleaned up with a general spill kit, but a few chemicals require specialized spill procedures. For each substance listed, determine whether a general spill kit is sufficient or if a specialized spill kit is needed: 1. Mercury 2. Hydrofluoric acid 3. acetone 4. phosphoric acid 5. methanol

1. Special 2. special 3. general 4. general 5. general

What are the steps in a liquid spill cleanup?

1. Surround the area with absorbent material, then cover the spill. 2. Scoop up the material and place in a plastic bag 3. Place the bagged waste in a solid waste container 4. Wipe down the area with detergent water

Determine the best way to deal with each of the following items that may dangle into the way during lab work... 1. Long hair 2. Loose necklaces 3. loose bracelets 4. long earrings 5. Flowy sleeves

1. Tie back or secure 2. Remove 3. Remove 4. Remove 5 Tie back or secure

When an alarm sounds in the laboratory, it is important to respond [Blank 1] and remain [Blank 2]. Listen for any other instructions, turn off any [Blank 3] and be prepared to leave immediately.

1. calmly 2. quiet 3. equipment

Identify the step that is not recommended when responding to an emergency.

Gather your belongings.

What is the recommended way to store hydrogen peroxide

In a tightly closed container in a dry and well-ventilated place

Which is NOT a good source of information about the hazards that affect waste disposal in a chemistry lab?

Your lab partner