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C o m p ld e th e f a l w i n g t

1 fro m "t i

T a n d th e u n k n o w n d , lu tio n .

U n k n o w n #

Th e S ta n d a r « r C u r v e C o n c e n tra tio n o f s ta n d a rd C u 2 +

s o ıu tio n

W a v e le n g th fo r m a x im u m a b s o rp tio n (k . A x)

c o rre s p o n d s to m a x im u m a b s o rp tio n (k . .

) o n y o u r g ra p h . A tta c h a c o p y o f th e g ra p h . w a v e le n g th (o n th e x x i s ) . In c lu d e A L L o f th e a b o v e d a ta p o in ts . L a b e ı th e w a

v e ıe n g th th a t

C re a te a g ra p h (u s e s m o o t h m a r k e d x -

y s c a « e r in E x c e l) o f a b s o rb a n c e (o n th e y - a x is ) v s .

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n m 而

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5 4 0 ピ竺上竺上竺址

C o m p le te th e fo ııo w in g ta b le s o f a b s o rb a n c e b y w a v e le n g th

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S h o w th e æ ıc u ıa tio n s

I \ f le r d ııu tio n ( M ) C o n c . B e fo re d iıu t io n (M ) IW

C . " . (M ) % E r r o r

c o n c e n tra tio n o f th e u n k n o w n b e fo re it w a s d ilu te d a n d th e p e rc e n t e rro r o f y o u r re s u h .

u n k n o w n s a m p ıe a fte r d ilu tio n (w ith "

e n

'

a n d d is tiııe d w a te r) . T h e n d e te rm in e th e U s in g th e b e s t

- fit e q u a tio n fro m th e c a ıib ra tio n c u rv e , c a \ c u la te th e c o n c e n tra tio n o f C u 2 ◆

i n e

D e te r m in a t io n o f U n k n o w n C o n c e n tra t io n

C a lib ra tio n c u rv e b e s t- fit e q u a tio n : .

ıin e o n th e g ra p h . A « a c h a c o p y o f th e g ra p h .

tre n d lin e (b e s t lin e a r - fıt) th ro u g h th e d a ta . S h o w b o th U re e q u a tio n a n d th e R

2 v a lu e fo r th is

th e y -

a x is ) v s . c o n c e n tra tio n o f C u 2 ◆

(o n th e x - a x is ) u s in g th e m a r k e d x -

y s c a tte r . \ n c \u d e a

C re a te a c a lib ra tio n c u rv e u s in g y o u r s ta n d a rd s o ıu tio n d a ta . ın E x c e l, g ra p h a b s o rb a n c e (o n

c o n c e n tra tio n .

S h o w a ıı th e c a lc u ıa tio n s fo r T u b e 7 . B e s u re to in c ıu d e c a ıc u \a tio n s fo r b o th to t

a ı v o ıu m e a n d

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0 . 4 9 u n d e r th e s a m e c o n d itio n s .

b . C a lc u la te th e c o n c e n tra tio n o f a n u n k n o w n c o p p e r s o ıu tio n w ith a n a b s o rb a n c e o f

a . C a lc u la te th e m o ta r a b s o rp tiv ity fo r th e s e c o n d itio n s . a n a b s o rb a n c e o f 0 . 3 7 in a c e lı o f 1 . 0 c m p a th ıe n g th a t a s e ıe c te d w a v e le n g th .

2 . A s o lu tio n k n o w n to c o n ta in 0 . 0 2 6 M C u 2 ◆ fo rm s a c o m p le x w ith e th y ıe n e d ia m in e th a t y ie ld s

c u rv e . H o w is th e s lo p e o f th e c a lib ra tio n c u rv e re ıa te d to th e m o ta r a b s o rp tiv ity ?

is g e n e ra lly g iv e n fo r th e w a v e ıe n g th s c o rre s p o n d in g to th e m a x im a in th e a b s o rp tio n

s o lu tio n . In th is c a s e , "

a

"

h a s th e u n its U m o l ·

c m . A b s o rp tiv ity c h a n g e s w ith w a v e \ e n g th a n d

a b s o rp tiv ity T a '

) is e q u a ı '

to th e a b s o rb a n c e o f a o n e - c e n tim e te r th ic k s a m p ıe o f a 1 . 0 M s p e c tro p h o to m e te rs h o ıd th e s a m p le s iz e ç b

"

) to l c m , a ıth o u g h th e y c a n v a ry . T h e m o ta r

1 . A b s o rb a n c e d e p e n d s o n th e th ic k n e s s o f th e s a m p le s iz e . T h e c u v e « e s fo r m o s t

P O S T L A B Q U E S T IO N S

c o u ıd b e im p ro v e d .

a n d p re c is io n s h o u ld a ıs o b e e v a lu a te d . D is c u s s s o u rc e s o r e rro r a n d h o w th e e x p e rim e n t

c o n te x t o f th e p u rp o s e a n d s c ie n tific th e o ry (a s p re s e n te d in th e in tro d u c tio n ) . B o th a c c u ra c y

C o p p e r e x p e rim e n t a n d a tta c h it to th is fo rm . T h is s e c tio n s h o u ıd in te rp re t th e re s u ıts in

e x p e rim e n t (i. e . Th e re s u lts ) . T Y p E a d is c u s s io n s e c t io n fo r th e s p e c tro c h e m ic a ı A n a ıy s is

o f

T h e d is c u s s io n s e c tio n o f a fo rm a l re p o rt e v a lu a te s th e d a ta a n d o b s e rv a tio n s fo r th e

P re p · ra tio n fo r W r ıt in g a F o r m a ı R e p o r t