4.appliedlechat.ppt
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Transcript of 4.appliedlechat.ppt
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AppliedLe Chatelieir's
Principle
Lesson 4
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Lab 19A
Le Chateliers Principle
Copy the five Equilibrium Equations into your lab handout
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Part I
Thymol Blue (blue) + H+ ThymolBlue (yellow)
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Fe3+
(aq) + SCN-
(aq) FeSCN2+
(aq)
yellow brown
Fe3+(aq) + 3OH- Fe(OH)3(s)
Part II
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Co(H2O)2+ + 2Cl- Co(H2O)!Cl2
2- +
2H2O(l)"#n$ blue
Part III
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%ner&y + 2CrO!
2- + 2H+ Cr2O
'
2- +
H2O(l)yellow oran&e
Ba2+ + CrO!2-
BaCrO!(s)
Part IV
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Cu(H2O)42+ + 2H!
Cu(OH)2(s) + 2H4+ + 2H2O
li"ht blue po#der blue
Cu(OH)2(s)+ 4H! Cu(H!)42+ + 2OH$
po#der blue %iolet
Part V
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Application o& Le Chateliers Principle
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
*no# the &ollo#in"
Any acid is H+
Any baseis OH$
Acidsreact withbasesH+ + OH$ , H2O(l)
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
Add H+
Add CrO42$
Add Cr2O2$
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Application o& Le Chateliers Principle
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
*no# the &ollo#in"
Any acid is H+
Any baseis OH$
Acidsreact withbasesH+ + OH$ , H2O(l)
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
Add H+
Add CrO42$
Add Cr2O2$
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Application o& Le Chateliers Principle
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
*no# the &ollo#in"
Any acid is H+
Any baseis OH$
Acidsreact withbasesH+ + OH$ , H2O(l)
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
Add H+
Add CrO42$
Add Cr2O2$
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Application o& Le Chateliers Principle
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
*no# the &ollo#in"
Any acid is H+
Any baseis OH$
Acidsreact withbasesH+ + OH$ , H2O(l)
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
Add H+ ri"ht decrease increase oran"e
Add CrO42$
Add Cr2O2$
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Application o& Le Chateliers Principle
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
*no# the &ollo#in"
Any acid is H+
Any baseis OH$
Acidsreact withbasesH+ + OH$ , H2O(l)
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
Add H+ ri"ht decrease increase oran"e
Add CrO42$ ri"ht increase increase 0
Add Cr2O2$
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
*no# the &ollo#in"
Any acid is H+
Any baseis OH$
Acidsreact withbasesH+ + OH$ , H2O(l)
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
Add H+ ri"ht decrease increase oran"e
Add CrO42$ ri"ht increase increase 0
Add Cr2O2$ le&t increases increases 0
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
Acidsreact withbasesH+ + OH$ , H2O(l)
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
Acidsreact withbasesH+ + OH$ , H2O(l)
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
Add aOH
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
Acidsreact withbasesH+ + OH$ , H2O(l)
aOH , a+ + OH$
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
Add aOH
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
Acidsreact withbasesH+ + OH$ , H2O(l)
aOH , a+ + OH$
spectator ion stress ion$lo#ers H+
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
Add aOH
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
Acidsreact withbasesH+ + OH$ , H2O(l)
aOH , a+ + OH$
spectator ion stress ion$lo#ers H+
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
Add aOH le&t increases decreases ello#
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
aCrO4has lo# solubilit
aCr2Ohas hi"h solubilit
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
A i i & C i i i 1
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
aCrO4has lo# solubilit
aCr2Ohas hi"h solubilit
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
a(O!)2
A li i & L Ch li P i i l 1
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
aCrO4has lo# solubilit$ a2+reacts #ith CrO4
2$
aCr2Ohas hi"h solubilit$ no reaction
a(O!)2 , a2+ + 2O!$
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
a(O!)2
A li ti & L Ch t li P i i l 1
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
aCrO4has lo# solubilit
aCr2Ohas hi"h solubilit
a(O!)2 , a2+ + 2O!$
stress spectator
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
a(O!)2
A li ti & L Ch t li P i i l 1
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
a2+reacts #ith this ion
aCrO4has lo# solubilit
aCr2Ohas hi"h solubilit
a(O!)2 , a2+ + 2O!$
stress spectator
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
a(O!)2
A li ti & L Ch t li P i i l 1
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
a2+reacts #ith this ion
aCrO4has lo# solubilit
aCr2Ohas hi"h solubilit
a(O!)2 , a2+ + 2O!$
stress spectator
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
a(O!)2 le&t decreases decreases ello#
A li ti & L Ch t li P i i l 1
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
HCl
A li ti & L Ch t li P i i l 1
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
HCl , H+ + Cl$
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
HCl
Application o& Le Chateliers Principle 1
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
HCl , H+ + Cl$stress spectator
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
HCl
Application o& Le Chateliers Principle 1
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Application o& Le Chateliers Principle$1
ner" + 2CrO42$ + 2H+ Cr2O
2$ + H2O(l)ello# oran"e
HCl , H+ + Cl$stress spectator
-tress -hi&t .CrO42$/ .Cr2O
2$/ colour
HCl ri"ht decreases increases oran"e
Application o& Le Chateliers Principle 2
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Application o& Le Chateliers Principle$ 2
ner" + Co(H2O)32+ + 2Cl$ Co(H2O)4Cl2
2$ + 2H2O(l)pin blue
-tress stress ion spectator ion shi&t colour
HCl
Application o& Le Chateliers Principle 2
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Application o& Le Chateliers Principle$ 2
ner" + Co(H2O)32+ + 2Cl$ Co(H2O)4Cl2
2$ + 2H2O(l)pin blue
HCl , H+ + Cl$
-tress stress ion spectator ion shi&t colour
HCl
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Application o& Le Chateliers Principle 2
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Application o& Le Chatelier s Principle$ 2
Co(H2O)32+ + 2Cl$ Co(H2O)4Cl2 + 2H2O(l)
pin blue
HCl , H+ + Cl$spectator stress
-tress stress ion spectator ion shi&t colour
HCl Cl$ H+ ri"ht blue
Application o& Le Chateliers Principle 2
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Application o& Le Chatelier s Principle$ 2
ner" + Co(H2O)32+ + 2Cl$ Co(H2O)4Cl2
2$ + 2H2O(l)pin blue
-tress stress ion spectator ion shi&t colour
5ncrease te6perature
Application o& Le Chateliers Principle$ 2
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Application o& Le Chatelier s Principle$ 2
ner" + Co(H2O)32+ + 2Cl$ Co(H2O)4Cl2
2$ + 2H2O(l)pin blue
-tress stress ion spectator ion shi&t colour
5ncrease te6perature
Application o& Le Chateliers Principle$ 2
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Application o& Le Chatelier s Principle$ 2
ner" + Co(H2O)32+ + 2Cl$ Co(H2O)4Cl2
2$ + 2H2O(l)pin blue
-tress stress ion spectator ion shi&t colour
7 te6p none none ri"ht blue
Application o& Le Chateliers Principle$ 2
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Application o& Le Chatelier s Principle$ 2
ner" + Co(H2O)32+ + 2Cl$ Co(H2O)4Cl2
2$ + 2H2O(l)pin blue
-tress stress ion spectator ion shi&t colour
A"O!
Application o& Le Chateliers Principle$ 2
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Application o& Le Chatelier s Principle$ 2
ner" + Co(H2O)32+ + 2Cl$ Co(H2O)4Cl2
2$ + 2H2O(l)pin blue
A"O! , A"+ + O!
$
-tress stress ion spectator ion shi&t colour
A"O!
Application o& Le Chateliers Principle$ 2
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Application o& Le Chatelier s Principle 2
ner" + Co(H2O)32+ + 2Cl$ Co(H2O)4Cl2
2$ + 2H2O(l)pin blue
A"O! , A"+ + O!
$
7stress$ lo# solubilit (data boo$4) #ith Cl$
-tress stress ion spectator ion shi&t colour
A"O!
Application o& Le Chateliers Principle$ 2
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Application o& Le Chatelier s Principle 2
ner" + Co(H2O)32+ + 2Cl$ Co(H2O)4Cl2
2$ + 2H2O(l)pin blue
A"O! , A"+ + O!
$
7stress$ lo# solubilit (data boo$4) #ith Cl$
-tress stress ion spectator ion shi&t colour
A"O! A"+ O!
$ le&t pin
Here is a the first question from your lab I will give you a good answer
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Here is a the first question from your lab. I will give you a good answer
so that you understand the level of detail that is required in the response
. E!plain the colour changes observed when "e#$%&'
&( )*C$( and
$a%H were added to the thiocyanatoiron equilibrium system.
*tart by writing the equilibrium equation.
8e!+(a) + -C$(a) 8e(-C)
2+(a)
ello# bro#n
Adding 8e(O!)
!increasesthe .8e!+/and causes the reaction to shift
ri"htand turn bro#n.Adding *-Cincreases the .-C$/and causes the reaction to shift
ri"htand turn bro#n.
Adding aOHincreasesthe .OH$/which reacts with 8e!+( lowering the
.8e!+/causing the equilibrium to shift le&tand turn ello#.