Lab #8 - Lab 8 PDF

Title Lab #8 - Lab 8
Course General Chemistry I Laboratory
Institution College of Staten Island CUNY
Pages 3
File Size 34.8 KB
File Type PDF
Total Downloads 2
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Summary

Lab 8...


Description

1

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La b# 8–Ev a l u a t i o no ft h eGa sLa wCo ns t a nt Pa r t ne r ’ sNa me :J o r d a nEi d l i s z Da t eo fEx p e r i me n t :1 1 91 7

Theob j e c t i v eo ft hi se x p e r i me ntwa sf o ru st ofig u r eo ut t h ev o l u meo fakn o wnma s so fag a sa ta me a s u r e dt e mp e r a t u r ea n dpr e s s u r e . Wewo u l dt h e nu s et h i sd a t at ofig u r eo u tt h eu n i v e r s a lga s l a wc o n s t a n twh i c hi sR. Th ef u n da me n t a lt he or yo rp r i nc i pl et h a twa st e s t e ddu r i n gt h i s e x p e r i me ntwa sBo y l e ’ sLa w. Bo y l e ’ sl a ws t a t e dt h a ti ft e mp e r a t u r eo fag a ss a mp l ewa sh e l d c o ns t a n t , t hev o l umev a r i e di n v e r s e l ywi t hi t sp r e s s u r e . Thee q u a t i o nt h a ti su s e dt op r o v eBo y l e ’ s La wi sV=k 1 / p.An o t h e rp r i n c i p l et ha twa st e s t e dd ur i n gt h i se x p e r i me n twa sCh a r l e s ’l a w wh i c hs t a t e st h a tt hev o l u meo fag i v ema s so fg a sv a r i e sdi r e c t l ywi t hi t sa b s o l u t et e mp e r a t u r ei f t h ep r e s s u r er e ma i n sc o ns t a n t . Th ef o r mu l at h a tp r o v e sCh a r l e s ’l a wi sV=k 2 T. Ga s e st h a ta r e d e s c r i e de xa c t l yb yBo y l e ’ sa ndCha r l e s ’l a wsa r ei d e a lg a s e s . An o t h e rp r i nc i pl et h a ti st e s t e di n t h i se x p e r i me n ti sAv o g a d r o ’ sp r i n c i pl ewh i c hs t a t e st h a tt h ev o l u meo fag a ss a mp l ea tag i v e n t e mp e r a t u r ea n dp r e s s u r ei sp r o p o r t i o n a lt ot h ema s so rn u mb e ro fmo l e so ft h eg a s . Th ei d e a lg a s l a wi sPV=n RTwh i c hi su t i l i z e dd u r i n gt h i se x p e r i me n t . Th eme t h odt h a twa su t i l i z e ddu r i n g t h i se x p e r i me n twa sa sf o l l o ws . Th e1M o fHCLwa sa l r e a d yp r e p a r e df o ru ss on od i l u t i o nwa s n e c e s s a r y . Th eMgs a mp l ewa sa l s or e a d yt og os owej u s tt o okas a mp l ea ndwe i g he di to nt h e s c a l ea n dn o t e di to no u rd a t as he e t . Be f o r ewe i g h i n gt h es a mp l e , wema des ur et op o l i s ht h e s a mp l eu s i n gt h es t e e lwo o l .J o r d a nd r i e dt h emo u t ho ft h et u b ewi t ht i s s u e sa ss h o wnb yo u r p r o f e s s o r . Wep i pe t t e d4mLof1M HCLi n t ot h et e s tt ub e . Wet h e np l a c e dt hewe i g he d ma g ne s i u mi n t ot het e s tt u b ewi t ht h et u b et i l t e ds ot h a tt h ema g n e s i umr e s t e do nt hei ns i d ewa l l o ft h et e s tt u bewi t h o u tt o u c h i n gt h eHCls o l u t i o n .Wed i dma k es u r et h emo u t ho ft h et e s tt u b e wa sd r yu s i n gt h ec h e mi s t r yt i s s u ep a p e ro u rp r o f e s s o rs h o we du sb e f o r ep o u r i n gt h eHCl . We p u s he dt h ep l u n g e ro ft h es y r i n g ea l lt h ewa yi n . Wet hei n s e r t e dt h er ub b e rs t o p p e ri n t ot h et e s t

2 t u b ea n dr o t a t e dt h es y r i n g ei nt h ec l a mps ot h a tt e s tt u b ec a nr e ma i nt i l t e d , p r e v e n t i n gt h e ma g ne s i u mf r o ms l i d i ngi n t ot hes ol u t i o n. Wema d es u r et h et ub ewa sc l a mp e dt os t a n da f t e rt he s t o p p e rwa si n s e r t e ds ot h a tt h eMgwo u l db ea l l o we dt od r o pi nt ot h ea c i d . Th ep l u ng e rb e g a nt o mo v eo u ts l i g h t l yd u et oc o mp r e s s i o no ft h ea i ri nt het e s tt u b e . Wet h e nr e c o r d e dt h ei ni t i a l v o l umer e a d i n goft hes y r i ng eo nt h eda t as h e e t . Wer o t a t e dt hes y r i n g ea ndt e s tt u b es ot h a tt he ma g ne s i u m wou l ds l i d ed o wnt h et e s tt u b ei nt ot h es o l u t i o n . Wea l l o we dt h er e a c t i o nt op r o c c e d u n t i lt h ema g n e s i umr e a c t e d . Wer o t a t e dt h ep l u n g e rwi t h o uta p p l y i n gp r e s s u r et oi ta n dwa i t e d5 mi n u t e st oa l l o wi te q ua l i z e . Wer o t a t e dt h ep l u n g e ra g a i n , a n dr e c o r d e dt hefin a lv o l u mer e a d i n g o ft h es y r i n g eo nt h ed a t as h e e t . Th eba r o me t r i cp r e s s u r ea n dr o omt e mp e r a t u r ewa sg i v e nt ou s b yo u rp r o f e s s o rs owes i mp l yr e c o r d e di ti no u rd a t as h e e t .Wee mp t i e dt h ec o n t e n t sf o r mt e s t t u b ea n dr e p e a t e dt h ee x p e r i me ntt h r e emo r et i me s .Wema d es u r eb e f o r ee a c he xp e r i me n tt od r y t h emou t ho ft h et e s tt ub eb e f o r ea d d i n ga c i da ndr e p e a t e dt h eme t h o da sme nt i o n e da b o v e t h r ou g h o u tt h ee x p e r i me n t .Th ee xp e r i me n ta tfir s tga v eusp r ob l e ms . Aswec on d u c t e dt h e e x p e r i me ntweno t i c e df o rs omer e a s o nt h a tt h es y r i n g ewo u l db a r e l ymo v ec o mp a r e dt oo u ro t he r c o l l e a g u e s . Wer e d i dt h ee x p e r i me n ta n da s k e do u rpr o f e s s o ra n dwer e c he c k e dt hes t o p p e rt o e n s u r ee v e r y t h i n gwa sg o oda n dt h a tt h es t o p pe rwa sf u l l yi n s e r t e d . Wer e t r i e dt h ee x p e r i me n t a n dl u c ki l yi two r k e d . Th e r ea r eaf e wp o s s i b l ee r r or st h a t c ou l dh a v eo c c u r r e dd u r i n gt h e e x p e r i me nt . On eo ft he mi sfir s t , n o te ffe c t i v e l yp o l i s hi n gt h ema g n e s i ums a mp l et obeu s e d d u r i n gt h ee x p e r i me n t . Byn o td o i n gt h i sp r o p e r l y ,t heMgs a mp l ema yn o tr e a c tp r o p e r l ya n d f u r t h e rma yn o tp u s ht h ep l u n g e ri nt h es y r i n g e . Thi sma yha v ebe e nt h ee r r ort ha to c c ur r e dwh e n t h ep l un g e rd i dn o tp u s hi n s i d et h es y r i n g ea smuc hc o mp a r e dt oo u rc o l l e a g u e swhoc o n d u c t e d t h es a mee x pe r i me n t .An o t h e rp o t e n t i a le r r o rt ha tc o u l dh a v eo c c u r r e dd u r i n gt h i se x p e r i me n t wa sn o tp u t t i n gt h es y r i n g eo nt h es t a n dp r o p e r l y .Th es y r i n g ema yf a l lo u twh i l et h ep l u n g e ri s

3 b e i n gp u s he do u ta n dt h es yr i n g ema yb r e a k . I nc o nc l u s i o n ,Ih a v el e a r n e di mme n s e l yf r o mt h i s e x p e r i me nth o wt ot e s tGa sLa ws . Th i se x p e r i me n th a st a u gh tmeh o wt ot e s tg a sl a w.I twa sq u i t e f a s c i n a t i ngt ob ea bl et ov i s u a l l ys e et hep r oc e s s ....


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