Student Worker TrainingStudent Worker Training

Austin Peay State UniversityAustin Peay State University

Department of ChemistryDepartment of Chemistry

Fall 2013Fall 2013

Student Worker ResponsibilitiesStudent Worker Responsibilities

Office HelpOffice Help MailMail GradingGrading Other miscellaneous responsibilitiesOther miscellaneous responsibilities

Computer Lab AttendantComputer Lab Attendant Monitor roomMonitor room Note computer problemsNote computer problems Keep printer filled with paperKeep printer filled with paper

Student Worker ResponsibilitiesStudent Worker Responsibilities General Laboratory MaintenanceGeneral Laboratory Maintenance

Clean countertops / hoodsClean countertops / hoods Sort / restock lab drawersSort / restock lab drawers

Preparing General Chemistry LabsPreparing General Chemistry Labs Prepare solutions and dispensing Prepare solutions and dispensing

solidssolids Collect equipmentCollect equipment Set up / break down labsSet up / break down labs

Arriving to Work…Arriving to Work…

Sign log book in main officeSign log book in main office Report to your assigned supervisor for Report to your assigned supervisor for

taskstasks If your supervisor is unavailable, check If your supervisor is unavailable, check

“To Do” list“To Do” list Ask for something to doAsk for something to do

There is always something to do!

Laboratory SafetyLaboratory Safety

Come to work dressed as you would for labCome to work dressed as you would for lab

Always wear goggles when workingAlways wear goggles when working

Clean up after yourselfClean up after yourself

Respect others working with youRespect others working with you

Label all solutions properlyLabel all solutions properly

Dispose of waste properlyDispose of waste properly

Make sure all doors close behind youMake sure all doors close behind you

General Chemistry Lab General Chemistry Lab MaintenanceMaintenance

Wash down countertops and hoodsWash down countertops and hoods Make sure balances and surrounding Make sure balances and surrounding

areas are cleanareas are clean Fill all deionized water bottlesFill all deionized water bottles Fill all detergent and hand soap Fill all detergent and hand soap

bottlesbottles Replenish paper towel suppliesReplenish paper towel supplies Replenish weigh boat supplyReplenish weigh boat supply Make sure drawers are properly Make sure drawers are properly

stockedstocked

General Prep Room/Stockroom General Prep Room/Stockroom MaintenanceMaintenance

Wash down countertopsWash down countertops Put away clean glasswarePut away clean glassware

RacksRacks DishwasherDishwasher

Wash any dirty glasswareWash any dirty glassware Sweep floorSweep floor Last to leave:Last to leave:

Place trash can in Lab A311Place trash can in Lab A311 Close door between prep room and A311Close door between prep room and A311

Other General MaintenanceOther General Maintenance

Cleaning gogglesCleaning goggles Wash with soap & water every FridayWash with soap & water every Friday Swab with rubbing alcohol during the Swab with rubbing alcohol during the

week as neededweek as needed

Basic equipment repair and setupBasic equipment repair and setup Simple repairs (e.g., fixing broken pipet Simple repairs (e.g., fixing broken pipet

bulbs)bulbs) Equipment setup (e.g., calibrating pH Equipment setup (e.g., calibrating pH

meters)meters)

Laboratory PreparationLaboratory Preparation

Introductory labs (CHEM 1011, 1021, Introductory labs (CHEM 1011, 1021, 1041, 1111, and 1121) are overseen 1041, 1111, and 1121) are overseen by the lab manager, Mr. Palmerby the lab manager, Mr. Palmer

All other labs are overseen by the All other labs are overseen by the responsible faculty memberresponsible faculty member

Laboratory PreparationLaboratory Preparation Preparing solutionsPreparing solutions

Dispensing solids into temporary Dispensing solids into temporary containerscontainers

Gathering equipmentGathering equipment

Setting up / removing chemicals and Setting up / removing chemicals and equipment in labsequipment in labs

Laboratory PreparationLaboratory PreparationEach introductory lab Each introductory lab has an associated has an associated prep sheet outlining:prep sheet outlining:

ChemicalsChemicals

SolutionsSolutions

Special equipmentSpecial equipment

Waste disposalWaste disposal

Working with ChemicalsWorking with Chemicals

Always wear gogglesAlways wear goggles

You may need to wear glovesYou may need to wear gloves

Ask your supervisor or check the Material Ask your supervisor or check the Material Safety Data Sheet (MSDS) if unsure of Safety Data Sheet (MSDS) if unsure of specific hazardsspecific hazards

Clean up all spills / messes immediatelyClean up all spills / messes immediately

Preparing SolutionsPreparing Solutions Concentrations needed may be approximate Concentrations needed may be approximate

or exactor exact Use volumetric glassware for exact concentrationsUse volumetric glassware for exact concentrations Can use beakers or poly storage bottles for Can use beakers or poly storage bottles for

approximate concentration solutionsapproximate concentration solutions

Some reagents are aqueous solutions and Some reagents are aqueous solutions and may need to be dilutedmay need to be diluted Use the dilution equation, MUse the dilution equation, MccVVcc = M = MddVVdd

Always add concentrated acids to waterAlways add concentrated acids to water

All calculations should be checked by your All calculations should be checked by your supervisorsupervisor

Using a BalanceUsing a Balance NEVER weigh into weigh boat on balanceNEVER weigh into weigh boat on balance

Place weigh boat on balancePlace weigh boat on balance Tare balanceTare balance Remove weigh boat from balance and add Remove weigh boat from balance and add

solidsolid Place weigh boat back on balancePlace weigh boat back on balance Remove weigh boat again before adding or Remove weigh boat again before adding or

removing solidremoving solid

Dispose of excess solids properlyDispose of excess solids properly NEVER put back into reagent bottle, use NEVER put back into reagent bottle, use

beaker as temporary waste containerbeaker as temporary waste container Ask your supervisor if unsureAsk your supervisor if unsure

Labeling ChemicalsLabeling Chemicals

For introductory labs, labels must For introductory labs, labels must match names used in labmatch names used in lab e.g., vinegar vs. acetic acide.g., vinegar vs. acetic acid

Unknowns should match the Prep SheetUnknowns should match the Prep Sheet

Label format:Label format:

Labeling Chemical HazardsLabeling Chemical HazardsNFPA = National Fire NFPA = National Fire

Protection AssociationProtection Association

Chemicals rated in 4 Chemicals rated in 4 categories:categories:

Health (blue)Health (blue) Fire (red)Fire (red) Reactivity (yellow)Reactivity (yellow) Specific hazards Specific hazards

(white)(white)

Each category is rated on a Each category is rated on a scale of 0 (low risk) to 4 scale of 0 (low risk) to 4 (high risk)(high risk)

The specific hazard category The specific hazard category uses symbols to highlight uses symbols to highlight the special hazard.the special hazard.

Label ExamplesLabel Examples

Solution:Solution:

Solid:Solid:

Volumetric GlasswareVolumetric GlasswareUsed when exact concentration is necessary

Volumetric Flasks Volumetric Pipets Burets

Other GlasswareOther Glassware

Beaker

Erlenmeyer Flask

Mortar & Pestle

Buchner Funnel

Filter funnel

Crucible & Cover

Evaporating Dishes

Watch Glass

Filter Flask

Graduated

Cylinders

Storage ContainersStorage Containers

Poly Bottles

Glass Bottles Carboys

Hold 50 – 1000 mL

Hold 50 – 1000 mL

Hold 5 – 30 L

Amber BottlesHold 50 – 1000 mL

VialsHold 1 – 100 mL

Wash BottlesHold 50 – 1000 mL

Lab EquipmentLab Equipment

Ring Stand

Tripod

Clamp

Buret Clamp

Bunsen Burner

Meeker Burner

Flints and Strikers

Rings Wire Gauze & Clay Triangle

Additional Lab EquipmentAdditional Lab Equipment

Test Tube Holders

Bottle Brushes

Thermometers

Crucible Tongs and Beaker Tongs

Spatulas and Scoopula

Cork and Rubber Stoppers

Chemical WasteChemical Waste

Always check with your supervisor Always check with your supervisor before throwing anything in the trashbefore throwing anything in the trash

The professor or the lab manager will The professor or the lab manager will prepare waste bottles for all chemicalsprepare waste bottles for all chemicals

Check label on waste bottle before Check label on waste bottle before adding anythingadding anything

Chemical Waste LabelChemical Waste Label

Waste Label identifies:Waste Label identifies:

Start dateStart date

Chemical namesChemical names

ConcentrationsConcentrations

HazardsHazards

Contact infoContact info

General Waste Disposal General Waste Disposal GuidelinesGuidelines

DO NOT mix organic solvents (acetone, hexane, etc.) DO NOT mix organic solvents (acetone, hexane, etc.) with aqueous solutionswith aqueous solutions

DO NOT pour chemicals down the drainDO NOT pour chemicals down the drain

DO NOT mix halogenated organic solvents DO NOT mix halogenated organic solvents (methylene chloride) with non-halogenated organic (methylene chloride) with non-halogenated organic solvents (hexane)solvents (hexane)

Chemicals containing heavy metals (metals larger Chemicals containing heavy metals (metals larger than Calcium, atomic number > 20) MUST be than Calcium, atomic number > 20) MUST be collectedcollected

General PointsGeneral Points Safety comes firstSafety comes first

Clean up after yourselfClean up after yourself Respect chemicals and equipmentRespect chemicals and equipment

Be responsible and courteous of Be responsible and courteous of those around youthose around you Don’t leave doors propped or unlatchedDon’t leave doors propped or unlatched Clean up after yourselfClean up after yourself Don’t be afraid to ask questionsDon’t be afraid to ask questions

There is ALWAYS something to do There is ALWAYS something to do