CHEM1003 Lab manual 2019 PDF

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Lab manual for CHEM1003 from a few years ago...

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CHEM1003( ( Introductory(Chemistry( ( Laboratory(Manual( ( 2019( (

( ( ( School(of(Molecular(Sciences( ! ! ! Name:(( ( ( Student(ID:( ( ( ( Lab(Day/Time:( ( Demonstrator:( ( (

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CHEM1003! !

Table(of(Contents( ! LABORATORY(SCHEDULE(

iv!

ATTENDANCE(AND(ASSESSMENT(

v!

LABORATORY(GUIDELINES(

x!

SAFETY(IN(THE(LABORATORY(

xiii!

LABORATORY(MANUAL(

xvi!

SIGNIFICANT(FIGURES(

xvii!

TRANSFERRING(LIQUIDS(&(SOLIDS(

xxi!

Transferring!liquids! Transferring!solids!

xxi! xxii!

CARE(AND(USE(OF(BALANCES(

xxiv!

ACCURATELY(WEIGHING(AN(APPROXIMATE(QUANTITY(

xxiv!

VOLUMETRIC(APPARATUS(

xxvi! xxvi! xxvii! xxix!

Pipette! Burette! Volumetric!flask!

xxx!

FILTRATION(

xxxi!

EQUATION(WRITING( THE(PERIODIC(TABLE(OF(THE(ELEMENTS(

xxxii!

STANDARD(REDUCTION(POTENTIALS(AT(25oC(

xxxiii!

PLAN(OF(FIRST(YEAR(LABORATORIES(

xxxiv!

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ii

CHEM1003! ! ! ! LABORATORY(EXERCISES( ! !

1.! Introduction! to! the! Chemicals! and! the! Chemical! Laboratory! ! ! 2.!! Intermolecular!Forces! ! 3.!! Acids!and!Bases! ! ! 4.!! Chemical!Equilibrium! ! 5.!! Oxidation!and!Reduction! ! 6.!! Molecular!Models! ! ! !!! !! !

UNIT(CONTACTS( ( Unit(coordinator(and(Lecturer:( Dr.!Dino!Spagnoli! Email:[email protected]!!! Rm:!1.06,!Bayliss!Building! ! ! ( Unit(lecturers:( Prof.!Paul!Low! E:[email protected]!! ! ! ! ! ! !!

! !

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CHEM1003! !

LABORATORY(SCHEDULE( ! Week(

Week(

Session((length)(

Commencing(

Practical:!Introduction!to!the!Chemistry! Lab!(2hrs)! Workshop:!Introduction!to!the!Chemistry!

2!

4th!March!

3!

11th!March!

4!

18th!March!

Practical:!Intermolecular!Forces!(2!hrs)!

5!

25th!March!

Workshop:!Intermolecular!Forces!(1!hr)!

6!

1st!April!

Practical:!Acid!and!Bases!(3!hrs)!

7!

8th!April!

Practical:!Chemical!Equilibrium!(2!hrs)!

8!

15th!April!

Workshop:!Chemical!Equilibrium!(1!hr)!

10!

6th!May!

Practical:!Oxidation!and!Reduction!(2!hrs)!

11!

13th!May!

Workshop:!Oxidation!and!Reduction!(1!hr)!

12!

20th!May!

Practical:!Molecular!Models!(3!hrs)!

Lab!(1!hr)!

! !

iv

CHEM1003! !

ATTENDANCE(AND(ASSESSMENT( ! Attendances! at! all! laboratory! and! review! workshop! classes! are! compulsory.! Four!of!the!six!experiments! take!place!over!a!three-week!time!frame.!The!online! pre-laboratory! video! and! quiz! takes! place! in! the! first! week.! The! two-hour! practical! session! takes! place! during! the! second! week.! A! one-hour! review! workshop! takes! place! during! the! third! week.! Demonstrators! will! mark! your! attendance! at! the! start! of! each! session.! The! only! exception! to! this! format! is! for! the!Acid!and!Bases!and! Molecular!Models!Laboratory.!In!these!laboratories!there! will! be! an! online! pre-laboratory! quiz! and! a! three-hour! laboratory! session.! The! combination! of! online! pre-laboratory! quiz! and! the! worksheets! for! each! experiment!contribute!25%!towards!the!final!unit!mark.!! ! If!you!do!not!attend!your!designated!laboratory!session,!you!will!receive!a!mark! of! zero! for! that! part! of! the! laboratory! assessment.! Reasons! for!absence! such! as! time! spent! on! holidays! with! family! or! friends,! or! attending! the! wedding! of! a! friend!are!not!acceptable!excuses!for!missing!a!laboratory!practical.!! ! Special!consideration!must!be!approved!from!your!Faculty!if!you!do!not!wish!to! be!penalised!for!missing!your!laboratory!session.!The!University’s!procedure!for! special!consideration!is!described!at!the!following!website,!and!is!summarised!in! the!flow!diagram!below.! http://www.student.uwa.edu.au/course/exams/consideration

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CHEM1003! ! Obtain evidence to support your special consideration application Within three UWA working days from%the% assessment%due%date%

Apply for special consideration from your Faculty Student Office

Special consideration granted

Special consideration not granted

Within three UWA working days Contact unit coordinator to discuss amendment(s) to assessment. Failure to contact unit coordinator within three UWA working days will result in a mark of 0 (zero) for the missed assessment.

You may appeal decision if you believe appropriate grounds exist.

! ! ! Practical! work! is! an! integral! part! of! the! CHEM1003! Introductory! Chemistry! course.! On! each! day! of! the! practical! session! you! should! expect! to! be! in! the! laboratory!from!10am! or!2pm.! On!each!day! of!the!review! workshop!you!should! expect! to! be! in! the! laboratory! from! 10am! or! 2pm.! All! practical! and! review! tutorials!take!place!in!the!laboratory!that!you!have!been!assigned!through!CAS.! ! If! all! students! cannot! complete! the! laboratory! due! to! a! rare! event! such! as! equipment!failure!or!a!building!evacuation,!then!the!unit!coordinator!will!make!a! decision!at!the!time!so!that!students!are!not!disadvantaged!in!any!way.! ! DEMONSTRATORS( ! It!is!to!your!advantage!to!consult!your!demonstrator!freely!on!any!aspect!of!the! practical!work.!!Demonstrators!are!provided!to!help!you.! ! ! ! ! ! ! ! !

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CHEM1003! ! ! ASSESSMENT(OF(LABORATORY(( ! There!are!six!laboratory!topics!in!CHEM1003.!( 1. Introduction!to!the!Chemicals!and!the!Chemistry!Lab! 2. Intermolecular!Forces! 3. Acids!and!Bases! 4. Chemical!Equilibrium! 5. Oxidation!and!Reduction!! 6. Molecular!Models! Topics!numbers!1,!2,!4!and!5!have!the!following!structure! •

Online!pre!laboratory!video!and!quiz!

•

Two-hour!practical!session!

•

One-hour!review!workshop!session!

Topics!number!3!and!6!have!the!following!structure! •

Online!pre!laboratory!video!and!quiz!

•

Three-hour!practical!session!

ONLINE(PRE(LABORATORY(VIDEO(AND(QUIZ( There!are!online!videos!to!watch!and!an!associated!online!quiz!to!complete! before!attending!the!practical!laboratory.!These!are!accessed!from!the!LMS.! Failure!to!complete!your!pre!lab!quiz!before!the!laboratory!session!will!result!in! loss!of!marks.!Each!quiz!will!be!open!the!week!before!the!date!of!the!lab!and!you! will!have!two!attempts!at!each!quiz.!Your!highest!grade!will!be!recorded.!The! assessed!online!quiz!is!worth!1!mark!out!of!10!for!each!experiment.!The!online! pre!lab!quizzes!will!open!at!the!following!weeks!in!semester:( •

Identifications!of!Ions:!Week!1!

•

Intermolecular!Forces:!Week!3!

•

Acid!and!Bases:!Week!5!

•

Chemical!Equilibrium:!Week!6!

•

Oxidation!and!Reduction:!Week!9! !

!

vii

CHEM1003! ! •

Molecular!Models:!Week!11!

TWO-HOUR(or(THREE-HOUR(PRACTICAL(! During! the! two-hour! or! three-hour! practical! session! you! will! perform! the! experiment,!write!down!your!observations,!perform!calculations!and!analyse!the! data.! Unless! otherwise! instructed! by! your! demonstrator! you! work! individually! on! each! experiment.! All! calculations! are! to! be! shown! in! full.! The! observations! and!calculations!are!to!written!on!worksheets!that!will!be!provided!to!you!at!the! start! of! your! lab! session.! The! observations! and! calculations! on! the! worksheets! are! worth! 5! marks! out! of! 10! for! topics! 1,! 2,! 4! and! 5! and! 9! marks! out! of! 10! for! topics!3!and!6.!! ONE-HOUR(REVIEW(WORKSHOP(FOR(TOPICS(1,(2,(4(and(5( At!the!review!workshop!you!will!work!in!small!groups!to!discuss!the!results!and! observations!that!you!obtained!the!previous!week!and!complete!the! worksheet.! You! will! discuss! the! advantages! and! limitations! of! the! experimental! procedure! and! critically! evaluate! it! so! that! improvements! could! be! made! if! you! were! to! perform! the! experiment! again.! You! will! also! answer! questions! on! a! worksheet! that! will! form! the! assessment! for! the! review! workshop.! The! answers! on! the! worksheet!are!worth!4!marks!out!of!10!for!each!experiment.! The!worksheets!are!submitted!for!marking!at!the!last!session!held!for!each!of!the! topics.! If( you( miss( the( review( workshop,( for( any( reason,( but( completed( the( practical( worksheet,( you( have( 3( working( days( to( submit( the( practical( worksheet(for(marking.(Please(arrange(submission(of(worksheet(with(your( demonstrator(or(unit(coordinator.(( ( If(you(miss(the(practical(session(and(there(is(a(workshop(for(that(topic,(you( can( still( attend( the( workshop,( as( results( will( be( provided( for( you( to( complete(the(workshop(questions.( ! There!is! no!practical! examination! in!chemistry,! but!students! are!expected! to!be! familiar! with! the! content! of! the! practical! course.! The! final! examination! for! CHEM1003!Introductory!Chemistry!may!include!questions!on!one!or!more!of!the! experiments.! In! addition,! the! laboratory! mark! is! considered! when! deciding! borderline!cases.! ! If! you! are! more! than! ten! minutes! late! for! any! practical! or! workshop! you! will! receive! a! reduced! mark.! This! is! due! to! the! importance! of! the! pre! laboratory! discussions!with!your!demonstrators.! ! IF( YOU( ARE( MORE( THAN( 15( MINUTES( LATE( FOR( THE( PRACTICAL( SESSION( YOU(MAY(NOT(BE(ALLOWED(TO(COMPLETE(THE(EXPERIMENT(AND(RESULT( IN( A( ZERO( MARK( FOR( THAT( COMPONENT( OF( THE( LAB.( THIS( IS( DUE( TO( SAFTEY(INFORMATION(THAT(THE(DEMONSTRATOR(WILL(TELL(YOU(IN(THE( PRE(LABORATORY(DISCUSSION.( ! !

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CHEM1003! ! ACADEMIC(CONDUCT( The! following! definitions! are! extracted! from! the! UWA! Policy! on! Academic! Conduct:! Ethical! Scholarship,! Academic! Literacy! and! Academic! Misconduct,! which! can! be! found! at:!! (http://www.universitypolicies.uwa.edu.au/search?method=document&id=UP0 7%2F21)!! ! (i)! Academic! Misconduct.! Academic! misconduct! is! any! activity! or! practice! engaged! in! by! a! student! that! breaches! explicit! guidelines! relating! to! the! production!of!work!for!assessment,!in!a!manner!that!compromises!or!defeats!the! purpose!of!that!assessment.!!Students!must!not!engage!in!academic!misconduct.!! Any!such!activity!undermines!an!ethos!of!ethical!scholarship.!! (ii)!! Scope! of! Academic! Misconduct! and! Associated! Penalties.! ! Academic! misconduct! includes,! but! is! not! limited! to! cheating,! or! attempting! to! cheat! through:! ! ! (a)! collusion! ! (b)! inappropriate!collaboration! ! (c)!! plagiarism! ! (d)! misrepresenting! or!fabricating! data!or! results! or! other! assessable! work! ! (e)! inappropriate!electronic!data!sourcing/collection! ! (f)! breaching!rules!specified!for!the!conduct!of!examinations!in!a!way! that!! ! may!compromise!or!defeat!the!purposes!of!assessment.! ! PENALTIES!as!set!out!in!the!regulations!include:! ! 1.! (a)!cancellation!or!deprivation!of!credit!either!for!the!piece!of!assessable! work!in!! relation! to! which! misconduct! occurred! or! for! the! whole! unit! of! which!the!piece!of!! assessable!work!is!a!component,!but!only!if!the!misconduct! involved!acting!! dishonestly!or!unfairly! ! (b)! requirement! to! do! further! work! or! repeat! work! within! the! unit! or! course!in!! relation!to!which!misconduct!occurred! ! Before(commencement(of(each(practical(session,(you(will(be(asked(to(date,( sign(and(print(your(name(on(a(statement(that(indicates(you(understand(the( meaning( and( the( implications( of( the( penalties( if( caught( in( breach( of( the( above( policy.( Your( demonstrator( will( check( that( this( has( been( completed( before( you(start( your( experiment(s).(Your( work( will(not( be( marked(if( you( have(not(completed(this(step.!

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ix

CHEM1003! !

LABORATORY(GUIDELINES( ! 1. Risks! are!highlighted! in! the! pre-laboratory! demonstration! given!by! your! demonstrator! at! the! commencement! of! each! laboratory.! If! you! are! not! present! at! this! presentation,! you! risk! injury! to! yourself! and! fellow! students.! It! is! a! requirement! that! you! attend! the! pre-laboratory! demonstration.!Your!demonstrator! has!the! right!to!exclude!you! from!the! session,! should! you! miss! this.! If! you! miss! the! pre-laboratory! demonstration!and!are!more!than!10!minutes!late!you!will(not(be!able!to! complete! the! lab! and! will! receive! a! zero! grade! for! that! laboratory! assessment.! ! 2. It!is!compulsory! for!students!to!wear!laboratory!coats! at(all(times!in!the! laboratory.!!You!need!to! provide!your! own!laboratory! coat!(these!can! be! purchased! from! Uniprint! in! the! Guild! Village).! No( laboratory( coat( equates(to(no(admittance(to(the(laboratory.! ! 3. It! is!compulsory! for! students! to! wear! enclosed!footwear! at( all( times!in! the!laboratory.! Inadequate(footwear( equates(to( no( admittance(to( the( laboratory.! ! 4. It! is! compulsory! for! students! to! wear! safety! glasses! at( all( times! in! the! laboratory.! ! Prescription! glasses! are! not! adequate! protection.! An! acceptable!alternative!would!be!to!wear!contact!lenses!and!safety!glasses.! Safety! glasses! are! stored! in! the! laboratory! and! must! be! returned! at! the! conclusion!of!the!session.!Students(who(persistently(infringe(the(safety( glasses(requirement(will(be(asked(to(leave(the(laboratory.! ! 5. A!variety! of!gloves!are! stored!in!the!laboratory.! !Students!may! choose!to! wear!the!appropriate!gloves!of!their!choice!at!any!time.!!It!is!compulsory! to!wear!gloves!for!some!manipulations.!The!laboratory!demonstrator!will! inform!you!in!these!instances.! ! 6. The!above!rules!apply!unless!the!whole!laboratory!is!given!an!exemption! for!a!particular!experiment.! ! 7. Each! student! will! be! allocated! a! numbered! bench,! locker! and! associated! set!of!apparatus!and!must!work!at!that!place!during!the!year.! ! 8. Students(should(work(individually(unless(instructed(to(do(otherwise.! ! 9. Students! are!responsible! for! their!benches! and! apparatus.!! Other! classes! use! the! apparatus! in! each! locker,! and! all! equipment! must! be! cleaned! before! being! returned! to! the! locker.! ! Any! broken! apparatus! must! be! reported!immediately!(see!11!for!more!details).! ! ! ! ! !

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CHEM1003! ! 10. Keys! to! lockers! are! kept! in! a! special! box! in! the! laboratory.! ! Each! set! of! keys!is!labeled!with!the!laboratory!room!(A-D),!bench!number!(1-36)!and! locker! colour.! (e.g.! B9! red! is! laboratory! B,! bench! 9,! red! locker).! The! appropriate! key! should! be! taken! at! the! beginning! of! the! laboratory! session! and! returned! to! the! correct! place! at! its! conclusion.! ! If! you! have! taken!the!wrong!key,!return!it!immediately!to!avoid!confusion.! ! 11. !Lockers! must! be! checked! immediately! on! entering! the! laboratory.! ! Any! dirty,! broken,! or! missing! apparatus! should! be! reported! to! the! demonstrator! and! then! to! the! Laboratory! Technician! in! the! Preparation! Room.!! Broken!or!missing! apparatus!will! be!replaced!free! of!charge! only! during! the! first! ten! minutes! of! each! practical! session.! Good! lab! practice! will!also!state!that!you!should!carefully!pick!up!any!broken!pieces!of!glass! and!place!them!in!a!yellow!bin,!once!it!has!been!reported.! ! 12. Before! you! can! leave! the! laboratory,! your! demonstrator! must! sign! your! lab! worksheet! to! confirm! they! have! checked! your! drawers! and! equipment.!After!your!demonstrator!has!checked!your!locker,!hand!them! your! laboratory! worksheet! (with! all! answers! completed),! lock! your! drawers!and! return!the! key!to! its!place.! Ensure!your! departure!checklist! has!been!signed.!! ! 13. Make!efficient!use!of!your!time.!Never!be!idle!because!you!are!waiting!for! apparatus,! chemicals! or! a! reaction! to! be! completed.! Do! something! else! (e.g.!Attend!to!your!laboratory!write-up,!clean!your!glassware!or!proceed! with! a! later! section! of! the! experiment).! Do! not! leave! cleaning! your! glassware!to!the!end!of!the!laboratory!session.!Cleaning!of!most!glassware! can!be!achieved!with!a!bottlebrush!and!detergent.!! ! 14. Smoking!in!the!building!is!strictly!prohibited.! ! 15. Consumption! of! food! or! beverages! (including! bottled! water)! in! the! laboratory!is!prohibited.! ! 16. Mobile! phones! are! not! permitted! in! the! laboratory.! All! phones! must! be! switched! off! on! entering! the! laboratory.! If! this! causes! hardship,! please! speak!to!the!demonstrator!and!alternate!arrangements!can!be!made.! ! 17. Students!must!not!perform!unauthorised!or!unsupervised!experiments.! ! 18. All! operations! involving! the! evolution! of! poisonous! or! obnoxious! fumes! must! be! carried! out! in! a! fumehood.! ! Check! that! the! fan! is! on! before! starting!the!operation.! ! 19. Regard!all!substances!as!hazardous!unless!there!is!definite!information!to! the!contrary.! ! 20. Reagent! bottles! must! be! returned! to! their! designated! places.! ! Reagents! must! be! kept! free! from! contamination,! i.e.! solutions! once! removed! must! ! !

xi

CHEM1003! ! not!be! put!back,! stoppers!must! not!be!interchanged! and!insertion! of!any! instrument!into!reagent!bottles!is!prohibited.!!! ! 21. Do! not! remove! chemicals! from! other! laboratories.! ! If! you! cannot! find! a! chemical,! first! check! the! benches! in! your! laboratory! and! then! ask! the! Laboratory!Technician!in!the!Preparation!Room.! ! 22. IT(IS(ILLEGAL(TO(REMOVE(ANY(CHEMICAL(FROM(THE(LABORATORY.! ! 23. Sinks! are! for! the! disposal! of! liquid! waste! only.! ! Concentrated! acids! and! bases! must! be! washed! down! a! fumehood! sink! with! copious! amounts! of! running!water.!!Use!the!rubbish!bins!for!solid!waste.! ! 24. Chemical!spills!and!broken!glassware!should!be!immediately!reported!to! the!laboratory!demonstrator!for!appropriate!clean-up!and!disposal.! ! 25. Bunsen!burners! may! only! be!lit! with! the!flint! lighter! provided.!! When! in! use,!they!should!always!rest!on!a!heat!resistant!mat.!When!not!in!use,!they! must!be!turned!off.! ! 26. Balances! and! instruments! provided! for! certain! experiments! must! not! be! operated!until!their!correct!use!has!been!demonstrated.! !

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27. If! you! discover! an! emergency,! contact! the! Campus! Emergency! Number! (Dial!2222) ! ! immediately on any campus internal phone.!!Otherwise!ring!the!appropriate! emergency!service!on!'000'.

! Useful!contact!numbers!on!the!Crawley!Campus:!! Emergencies!!! ! 2222 Medical!Centre!! ! 2118 Urgent!minor!maintenance!!2025 Safety!and!Health!Office!! 3938 Security!! ! ! 3020

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CHEM1003! !

SAFETY(IN(THE(LABORATORY( ! A(copy(of(the(Departmental(Safety(Notes(is(attached(to(the(Notice(Board.( ! Accidents!can!be!avoided!altogether!by!working!carefully!and!intelligently.! ! In(the(case(of(an(accident:! ! i. Notify(the(demonstrator(immediately( ii. Seek(the(appropriate(treatment(immediately( iii. Advise( the( Coordinator( of( First( Year( Studies( (Dr.( Dino( Spagnoli,( 1.06)( iv. Complete( an( accident( report( form( (available( from( the( Preparation(...