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7/24/2019 labreport-7
1/2
Testube 1 2 3 4 5
Before [Fe 3+] 0.2 0.12 0.072 0.0432 0.02592
Mixing [CN!] 0.002 0.002 0.002 0.002 0.002
"fter[Fe3+
] 0.1 0.0# 0.03# 0.021# 0.0129#
Mixing [CN!] 0.3 0.1$ 0.10$ 0.0#4$ 0.03$$$
%s &%eig%t of
st'n('r()
xxx 1.# 2 2.3 2.#
%u &%eig%t of
un*non)
xxx 3.# 3.# 3.# 3.#
[Fe3+] xxx 0.0$9 0.11 0.12$ 0.14
[CN!] xxx 0.000$9 0.0011 0.0013 0.0014
[FeCN2+] 0.1 0.031 !0.03$ !0.0$4$ !0.11
*e, xxx 129.17 !2#3.$9 !9$1.4$ !2121.91
-esuts/ &N'su't *o n' 'ng s'e 'u'tion)
isussion of -esuts/
n t%is exerient e exerient'6 e'sure( t%e 'ue of * 't e,uiibriu b'se( on
(ere'sing onentr'tion of Fe &). T%e tren( of t%e resuts 's (ere'sing fro 129.17 u to
neg'tie &!) 2121.91. T%is is true if e i t'*e t%e 8e C%'teier rinie. "or(ing to 8e
C%'teier :T%e osition of e,uiibriu i oe so t%'t t%e onentr'tion of re't'nt inre'ses
'g'in.;
7/24/2019 labreport-7
2/2
Conusions 'n( -eoen('tions/
T%is exerient %'s t'ug%t us %o to oute for t%e exerient' 'ues of *e,. T%e
*e, fro seri' (iution r'nges fro 129.17 u to !2121.91. T%e resuts ere rig%t fro t%e'ssution of 8e C%'teier rinie. Fro t%e (ere'sing onentr'tion t%e *e, f'ors t%e
re't'nt t%'t is %6 t%e resut 's ointing out to t%e neg'tie 'ues of *e, 'ssuing t%e
teer'ture is onst'nt 't roo teer'ture %en t%e exerient 's erfore(. T%e resuts
seee( %ig% be'use t%e et%o( e use( 's t%e Beer!8'bert 8'.