chem

What are the appropriate actions to take in the event of a spill?

1. contaminated clothing must be.....

2. use a spill pillow to...

3. if splashed with large quantity of a chemical...

4. if solid is spilled....

5. eyewashes should be use for at least 15 minutes

-contaminated clothing must be removed and treated as hazardous waste

-use a spill pillow to absorb liquids with nontoxic vapors

-if splashed with large quantity of a chemical, use shower immediately

-if solid is spilled wash and scrape off, then wash with water

-eyewashes should be use for at least 15 minutes

What are the four key steps for responding to a spill? (ECIM)

Evacuate- large spills/hazardous

Communicate: notify an instructor or stock staff of *location and contents*

Isolate: contain spill with pillows

Mitigate: Clean up spill, instructor decides if you can clean it up

What are the two steps when you are on fire?

stop, drop and roll; wrap the person in a fire blanket

How do you use a fire extinguisher? (PASS)

PASS

Pull: the safety pin

Aim: base of the fire

Squeeze: handle to begin discharge

Sweep: discharge back and fourth

Match the part of the fire tetrahedron with the way to remove it:

heat, oxygen, chemical chain reaction, fuel

heat: pour water

oxygen: carbon dioxide fire extinguisher blanket

chemical chain reaction: halon fire extinguisher

fuel: minimize flammable solvents

Match fire class with their *fuel*for the fire:

(A, B, C, D)

A. Paper, clothing, plastics

B. Oil, organic solvents, gasoline

C. Hot plates, computers

D. Reactive metals (ie: sodium or litium)

Facts about fire

-Water cannot be used to extinguish a class \___ fire

-Removing heat keeps the \___ from vaporizing

-The fuel must be \_____ to burn

-Water cannot be used to extinguish a class D fire

-Removing heat keeps the fuel from vaporizing

-The fuel must be vaporized to burn

Which of the following are true about bleach?

-Nitrile gloves have a \___ min breakthrough time for bleach

-Bleach is a weak reducing agent

-Bleach can causes severe \___ burns and \____ damage

-If a significant amount of \____ is spilled on you, get into the \_____ immediately

-Bleach forms poisonous chlorine and chloramine gas when combined with \____

-Nitrile gloves have a 480 min breakthrough time for bleach

-Bleach can causes severe skin burns and eye damage

-If a significant amount of bleach is spilled on you, get into the shower immediately

-Bleach forms poisonous chlorine and chloramine gas when combined with ammonia

What percentage of known chemicals have safety data sheets?

0.1%

Who creates SDS?

chemical suppliers

What GHS components are incorporated in SDS?

pictograms

signal words

hazard ratings

hazard statements

precautionary statments

SDS is written for a (professional or industrial) setting, because of this, chemical hazards and personal protective equipment requirements may be (under or overstated).

SDS is written for an indurstial setting, because of this, chemical hazards and personal protective equipment requirements may be overstated.

Rearrange these steps for using SDS:

-Look at the procedures for safe handling

-compare label info to ensure you have right SDS

-determine hazard class

1. compare label info to ensure you have right SDS

2. determine hazard class

3. Look at the procedures for safe handling

What should be done while handling a corrrosive?

-if exposed...

-discard \_____ after contamination of taking off

-wear \_____, \_____, and \_______

-carry bottles in \_______ \_______

-use in the fume hood if the \______ is a \_______ hazard

-long or short clothing? \____-shedding closed toed shoes

-know the location of the \____ stations

-if exposed wash off skin immediately

-discard gloves after contamination of taking off

-wear gloves, goggles, and lab coat

-carry bottles in secondary containers

-use in the fume hood if the _corrosive is a inhalant hazard

-long clothing water-shedding closed toed shoes

-know the location of the eyewash stations

random error (pick two)

-reduced by using a best fit line

-failure to read the last sig figs

-inaccurate calibration of pH probe

-result of equipment failure

-consistently reading buret volume by looking up at liquid level

-light source on spectrometer dims over time

-causes outlier than can be determined by "Q-test"

-measured by calculating standard deviation

-eliminated by good experimental methods, more than 1 calibration step

-using graduated cylinder instead of volumetric flask to make standard deviations

random error:

-measured by calculating standard deviation

-reduced by using a best fit line,

instrumental error (pick two)

-reduced by using a best fit line

-failure to read the last sig figs

-inaccurate calibration of pH probe

-result of equipment failure

-consistently reading buret volume by looking up at liquid level

-light source on spectrometer dims over time

-causes outlier than can be determined by "Q-test"

-measured by calculating standard deviation

-eliminated by good experimental methods, more than 1 calibration step

-using graduated cylinder instead of volumetric flask to make standard deviations

instrumental error:

-inaccurate calibration of pH probe

-light source on spectrometer dims over time

methodological error (pick two)