Chemistry lab report

CCS D ay 1 S um mary Answ ers t o S um mary Q uestio ns 1. Pro vid e a s u m mary o f y o ur o bse rv a tio n s d urin g th e s yn th esis a nd r e cry sta lliz a tio n. When th e tw o s o lu tio ns w ere o rig in ally m ix e d to geth er, th e s o lu tio n tu rn e d g re en, b ut th ere w ere n o c ry sta ls . A s th e s o lu tio n s a t, c o ve re d , c ry sta ls b egan to fo rm . T his fo rm atio n r a pid ly in cre ase d w hen th e s o lu tio n w as p ut in a n ic e b ath . A fte r th e c ry sta ls were filt e re d o ut a nd h o t w ate r w as a d ded, th ey r e d is so lv e d w it h th e in cre a se in te m pera tu re . 2. How d o y o u fe el a bo ut t h e p urit y o f y o ur p ro d uct a t th is p oin t? T he p erc e nt y ie ld ? It lo oks r e ally p ure a t t h is p oin t d ue t h e t h e c la rit y a nd th e c o lo r th at a ppeare d, w hic h is gre en fo r b oth o f t h e s o lu tio n it s e lf a n d c ry sta ls . A v e ry s m all a m ou nt o f c ry sta ls re m ain ed in th e b e ake r w hen it is tr a n sfe rre d a nd a nd th is d id n ot a cco unt in to th e m ass. Perc e nt y ie ld = . 1 0 0. O ur p erc e nt y ie ld f o r b oth o ur o bta in ed m ass o f A c t u a l y i e l d t h e o r e t i c a l y i e l d a n d w as 1 00% . C O OK 2 2 4 • H 2 e C l H OF 3 • 6 2 Perc e nt Y ie ld C alc u la tio n fo r C O OK 2 2 4 • H 2 fo r e C l H OF 3 • 6 2 0 0 0 0 %8 . 3 g 8 . 3 g • 1 = 1 0 0 0 0 %4 . 1 4 . 1 • 1 = 1 Brie f S um mary o f E xp erim en ta l P ro ced ure Weig h o ut 8 .3 g ra m s o f a nd p la ce in 1 25 m L fla sk. A dd 2 5 m L o f D I w ate r a nd C O OK 2 2 4 • H 2 mix u ntil it d is so lv e s. W eig h o ut 4 .1 g o f . P la ce in 1 50 m L b eake r. A dd o xa la te e C l H OF 3 • 6 2 so lu tio n to Ir o n ( III) C hlo rid e s o lu tio n a nd m ix . P ou r in to b eake r. C ove r th e C O OK 2 2 4 • H 2 beake r a nd r e co rd o bse rv a tio ns e ve ry 1 5 m in ute s fo r 4 5 m in ute s. ( G re en c ry sta ls s h ould appear.) M ove th e b eake r in to a n ic e b a th a nd le t it s it fo r 3 0 m in ute s. F ilt e r o ut th e s o lid u sin g th e B uch ner fu nnel, th en m ove c a ptu re d c ry sta ls b ack in to b eake r. R edis so lv e th e c ry sta ls u sin g hot w ate r, th en r e co ve r a nd s e t a sid e fo r a w eek. Specif ic R esu lt s O bta in ed Tim e(m in ute s) Obse rv a tio ns 0 Gre en in c o lo r, n o c ry sta ls , a ll liq uid 15 Gre en in c o lo r, s o m e c ry sta ls b egin nin g to fo rm o n b otto m o f b eake r 30 Colo r is s lig htly lig h te r g re en, m ore c ry sta ls fo rm in g 45 Cry s ta ls h ave ta ke n o n s o lid s tr u ctu re , c o ve r b otto m o f b eake r Ic e B ath Cry sta l g ro w th in cre ase s Hot w ate r Cry sta ls r e dis so lv e d Brie f C onclu sio ns W e s u cce ssfu lly s yn th esiz e d c ry sta ls f r o m ir o n c o ord in atio n c o m po und. It w as a ppare nt h ow much te m pera tu re a ffe cts a s o lu tio ns s o lu bilit y . A t lo w er te m pe ra tu re s, s u ch a s th e ic e b ath , th e so lu bilit y w as lo w er, s o c ry sta ls fo rm ed. A t h ig her te m pe ra tu re s, s u ch a s w hen th e h ot w ate r was a dded, th e s o lu bilit y in cre ase d, a nd th e c ry sta ls w ere a ble to r e d is so lv e . O ur u se o f th e Dia l- a -G ra m w as a ls o e xtr e m ely s u cce ssfu l r e su lt in g in 1 00% y ie ld fo r a nd C O OK 2 2 4 • H 2 .e C l H OF 3 • 6 2