NH4 iman
4
Determination % of Ammonium (NH4+) d ari gara mnya I. Principle experiment Sejumlah tertentu larutan sampel garam NH4+ direaksikan dengan larutan NaOH standar terukur dan berlebih,lalu dipanaskan hingga NH3 menguap. Sisa NaOH dititrasi dengan larutan HCl standar dengan menggunakan indicator metal merah sampai terjadi perubahan warna dari jingga menjadi jingga merah. ada saat !" mek HCl # mek NaOH sisa sehingga kadarNH4+ dapat dihitung. II. Apparatus and ingredients $ %& ml burette $ 'unnel $ (%&$ml erlenme)er *ask $ lass Stir od $ (% ml - %&ml olumetric pipette $ /atch glass $ 0eaker glass $ Stati1e and clamps $ (%& ml 1olumetric *ask $ wash bottle $ ressed 'iber ad III. Procedure 2 /eigh out + &,(% g o 5mmonium salt sampl e accuratel) ( ! ranser to a (%& ml 1ol umetric *ask, mak e the solution up to the mark with a6ua dm, a nd mi7 thoroughl) 3ipette (%,&& ml ammonium salt sample solution and pipette %&ml standard sodium h)dro7ide, transer to "rlenme)er *ask and add three drops o meth)l red solution 4 !itrate with the &,2 N h)droclorid acid to be standar di8ed until the solution color is changed rom colorless to red orange %epeat the ti tration until the 1olume o titer is constant 9 Calculate pe rce nt o NH4+ dari gar amn) a IV. Indicator :eth)l red
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Transcript of NH4 iman
7/21/2019 NH4 iman
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Determination % of Ammonium (NH4+) dari garamnya
I. Principle experiment Sejumlah tertentu larutan sampel garam NH4+ direaksikan denganlarutan NaOH standar terukur dan berlebih,lalu dipanaskan hingga
NH3 menguap. Sisa NaOH dititrasi dengan larutan HCl standardengan menggunakan indicator metal merah sampai terjadiperubahan warna dari jingga menjadi jingga merah. ada saat !"mek HCl # mek NaOH sisa sehingga kadarNH4+ dapat dihitung.
II. Apparatus and ingredients$ %& ml burette$ 'unnel$ (%&$ml erlenme)er *ask$ lass Stir od
$ (% ml - %&ml olumetric pipette$ /atch glass $ 0eaker glass$ Stati1e and clamps$ (%& ml 1olumetric *ask$ wash bottle$ ressed 'iber ad
III. Procedure2 /eigh out + &,(% g o 5mmonium salt sample accuratel)( !rans er to a (%& ml 1olumetric *ask, make the solution up to the
mark with a6ua dm, and mi7 thoroughl)3 ipette (%,&& ml ammonium salt sample solution and pipette %&ml
standard sodium h)dro7ide, trans er to "rlenme)er *ask and addthree drops o meth)l red solution
4 !itrate with the &,2 N h)droclorid acid to be standardi8ed until thesolution color is changed rom colorless to red orange
% epeat the titration until the 1olume o titer is constant9 Calculate percent o NH4+ dari garamn)a
IV. Indicator
:eth)l red
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V. Substances that were weighed
5mmonium salt sample ; &,(%g
VI. weighing data
/eighing 1 2
Apparatus +Substance
0, !"#g
0, !$g
Apparatus 0,!$20g
0,!$%2g
Substance 0,2#2#g
0,2#1"g
VII. &eaction e'uation
()"+ *a' + (a )*a' - ()" )*a' + (a+ *a'()" )*a' - ()!*g +)2 *l(a )*a' +)/l*a' - (a/l*a' +)2 *l
VIII. /alculation
<NH4+ =
at the e6ui1alent point =
2. mek NH4+ # mek NaOH$ mek HCl
eading olume o !itration >ml2 st ( nd 3 rd
?ast scale 22,(@ 2(,&2'irst scale &,&& &,&& &,&&
Ased 1olume 22,(@ 2(,&251erage 1olume
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