Answer Scheme Practical 2012-V2003

7/26/2019 Answer Scheme Practical 2012-V2003

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ANSWER SCHEME FOR SCHOOLASSESSEMENT

CHEMISTRY PRACTICALPAPER 4 (962/4)

FIRST TERM


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EXPERIMENT 1

Title: Volumetric analysis -stoichiometry D1

Purpose: To the exact concentration of a monobasic acid, HX D1

Material:

pparatus:

!i"#1 is a solution of HX $ith concentration bet$een %&' molcm -(

to 1&% mol dm

-(

!ii" solid sodium hydroxide!iii" phenolphthalein indicator

!i"one )'&%cm(pipette and pipette filler!ii"one '%cm(burette!iii"a 1%%cm(*olumetric flas+ and stopper!i*" retort stand and clamp!*i"one $hite tile!*ii" one $ash bottle filled $ith distilled $ater!*iii" electronic balance

!ix" spatula!x" 1%% cm(bea+er

D1

ntroduction: The exact concentration of an aueous solution of an acid can bedetermined by titration $ith a standard al+aline solution li+e sodiumhydroxide solution&.odium is a stron/ base and $ill react $itheither a stron/ acid or a $ea+ acid causin/ the pH to decreasesharply $ithin the ran/e of pH ( to pH 11&The pH ran/e forphenolphthalein indicator is from pH 0&) to pH 1%&%&Therefore it is asuitable indicator&

D1

Procedure: 1&n empty dry 1%%cm

(

bea+er is $ei/hed and its mass recorded)&&%/ of solid sodium hydroxide is $ei/hed accurately inside thebea+er and its mass recorded

(&The solid sodium hydroxide is dissol*ed $ith distilled and ispoured into a 1%%cm(*olumertic flas+&Distilled $ater is addeduntil the *olume of the solution reached exactly the 1%%cm (mar+&The flas+ is stoppered and sha+en&This solution is labelled#)&

& )'&%cm(of # solution is pipetted into a titration flas+&'&T$o or three drops of phenolphthalein indicator is added and the

mixture is titrated $ith #)&The readin/s are recorded in thetable belo$

2&The titration is repeated as many times as possible to achie*eaccurate results&

D1

3esult !a"Mass measurements

Mass of bea+er 4 solid sodium hydroxide5/

Mass of empty bea+er5/

Mass of solid sodium hydroxide5/

6)


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!b" 6urette readin/s

Titration no 3ou/h ccurate

1 ) (

7inal readin/5cm(

nitial readin/5cm(

Volume of #)5cm( X1 X) X(

The a*era/e titre *alue for the abo*e result8 !X14 X)4 X(" 5(

9alculation

HX !a" 4 a;H !a" aX !a" 4 H);!l"

o& of mole of a;H 8 &%%5%&% 8 %&1% mole9oncentration of a;H 8 %&1%5 !1%%51%%%"81&%% mol dm -(

Ma Va 5 !Mb Vb"Ma 8

9onclusion: The exact concentration of the monobasic acid, HX is D1

9omments: 1&.mall amount of phenlphthalein is added because it is also a$ea+ or/anic acid)&The end-point is reached $hen the colour of the solution chan/esfrom colourless to pin+

D1

D) is /i*en for completion of experiment $ithin a specified time

D) is /i*en based on the plannin/ done by the student !detailed procedure and all the

headin/s of a report is /i*en"

Maximum mar+ for s+ill 6 8 ' mar+s s+ill D 8 < mar+s


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EXPERIMENT 2

Topic: Volumetric analysis = cid base and redox

Purpose: To determine the mass of sodium ethanedioate used to preparation containin/

sodium ethanedioate and hydrated ethanedioic acid&

!b" !i"9orrect readin/s-initial and final readin/s recorded in the correct spacesand to t$o decimal places except for >ero

!ii" .ufficient readin/- as least t$o *olume readin/s $ithin the ran/e of%&1%!%&)%"

!iii" 9orrect a*era/e set = correct difference ber$een final and initialreadin/ !minus correctly"

!i*"9orrect mean - arithmetic mean for titres used5obtained to t$odecimal places

!*" ccuracy = difference in mean *alue bet$een the teacher and thestudent

T$o mar+s for the difference bet$een %&%% cm(amd %&(%cm(

;ne mar+ for the difference bet$een %&(% cm(and %&'% cm(

931

.31

!d" .ame as in !b"?Ta+e the one $hich is the maximum for 6 mar+s"

62

!e" H4 ! from H)9);" 4 ;H- !from a;H" H);

Ma Va 5!Mb Vb" 8 151 a8H)9);, b 8a;H, Vb 8 )'&% , Vb 8xi

Mb81&@51@ !Ai*en #( contains 1&@/ ;H -per dm(, 3MM ;H-8 1@"

Ma 8 1&@ X xi 5!1@x )'&%" 8y1 !1&@51@" X Vb 5!Vb"

?H)9); )H4 4 9);

)-B ? 9);)-C 815) X Ma C

?9);)-C 8 X y1 91

!f" '9);)- 4 )Mn;

)- 4 12H4 1%9;) 4 )Mn)4 4 0H);

#Mn;!a" #4 !a" 4 Mn;

- !a"1 mol 1 mol

? Mn;-C 8 ?#Mn;C 8 (&' 5 ?(


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!/" ?9)%)-C from #1 and H)9);C

Therefore concentration of 9);)- from sodium ethanedioate

8?9);)-C from #1 = ? 9);

)-C from H)9);8y)= y1 8 y(

91

!h" a)9); )a4 4 9);

)-

1 mol of a)9);8 1 mol of 9);)- 3MM a)9);8 1(/mol

-1

9oncentration of a)9);8y(Mass of a)9);8 y(X 3MM a)9);8 >)/

91

!i" E of a)9);8 mass of a)9); FFFFFFFFFFFFFFFFFFF x 1%%E !mass of a)9);4mass a)9);" 8 >) FFFFFFFFFFFFFFFFFFFF x 1%%E

?>) 4 y1!3MM H)9);"C

91

!G" The reaction reuires an acidic medium 91

Maximum mar+s for s+ill 6 8' mar+s s+ill 9 82 mar+s


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EXPERIMENT 3

Topic: Vol!"#$ic %&%l'i P$i#' %&* #oic+io!"#$'

P$po": To *"#"$!i&" #+" p$i#' o, % %!pl" o, o*i! lp+i#"

-

(*) M.V.(I2)/M2V2(S2O20) 1 V.(I2) 1 xc!

(") 35c! 0 1 yc!

(,)(i)

(ii)

7S2O208 1 53/235 ' 1 z!ol*!0

O$M.V. (S2O20)/M2V2(I2) 1 ./. (M. 235)/ (53 y) 1./.

M. 1 53 y/2351 z!ol*!0

M% o, N%2Si& 23c!1 RMM N%2SO 1 p (;$%!)

(;) < p$i#' o, N%2SO 1 p/245 . 1 1 3 !%$= =ill C 1 6 !%$=


7/24

EXPERIMENT 4

Topic: R"%c#io& =i&"#ic

P$po": To *"#"$!i&" #+" "?"c# o, #"!p"$%#$" o& #+" $"%c#io& $%#"5

-

(*)

(")

./#

T

T"!p"$%#$" i&c$"%"@ $%#" $"%c#io& %lo i&c$"%"(,)(i)

(ii)

R%#" o, $"%c#io& %# 4oC +i;+"$ #+%& oC

N!"$ o, "?"c#iB" colliio& i&c$"%"5i&"#ic "&"$;' o, #+"p%$#icl" i&c$"%"

M%i!! !%$= ,o$ =ill > 1 3 !%$= =ill C 1 6 !%$=

EXPERIMENT 5

Topic: EDili$i! %&* olili#'


8/24

P$po": To *"#"$!i&" #+" olili#' p$o*c# @p@ o, M2%&* "+%lp'

c+%&;" o, ol#io&5

(*) 7 M28 1 .25/(.25 45 (,$o! "p .: #+" Bol!" A2)) 5. 1 a!ol*!0

708 1 45 /(.65) 53 1 b !ol*!0

p 1 7M28 7081 a b1 c!ol*!09

C.

(") p

C%&&o# #$%i;+# li&" (c$B")

3 T/OC (,)

CI

CI(;) Co$c# #+" #%l"

T"!p(oC) T"!p() ./T"!p( 0.)

p Lo; p

Plo# #+" ;$%p+ : Lo; p %;%i ./T (0.)

Lo; p

./T (0.)

' !1 '/1lop"

C.

C.

C.


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i&;: '1 ! C Lo; p 1 0 G H 7 ./T8 C 25 R

0! 1 0G H / 25 R GH 1 ! 25 R 1 B"

1 E&*o#+"$!ic OR $","$ ,$o!#+" ;$%p+ (") W+"& pi&c$"%"@ T"!p i&c$"%"

So@ "&*o#+"$!ic

M%i!! !%$= ,o$ =ill >1 3 !%$= =ill C 1 6 !%$=


10/24

ANSWER SCHEME FORSCHOOL >ASE ASSESSMENT

CHEMISTRY PRACTICALPAPER 4 (962/4)

SECON TERM

EXPERIMENT 6


11/24

Topic: T+"$!oc+"!i#$'

P$po": To *"#"$!i&" #+" +"%# o, $"%c#io&5

- (i)

(ii)

(iii)

H"%# $"l"%"* 1 !cG T 1(5) (452)(G T) 1 (5) (452) T. 1 JnJJ5 Kol"

No5 o, !ol A2 (N%2CO) 1 /. 1aNo5 o, !ol A (N%HCO) 1 '/4 1 b

H2 (A) 1 n/ a .0 1 JJJJ=K!ol0.

N%HCO

H.(A2) 1 +"%# $"l"%"* 1 !c GT

1 (5) (452)(T2) 1 p

H (A2) 1 p / a .0 1 0 JJJ55=K!ol0.

(*) N%2CO 2HCl 2N%Cl H2O O2 H. (.)N%HCO HCl N%Cl H2O CO2 H2 (2)

(,) (2) 2 @ 2N%HCO N%2CO H2O CO2H

H 1 2 H2 0 H. 1 2( JJJ) (0 JJ55) 1 JJJ5=K!ol0.

M%i!! !%$= ,o$ =ill > 1 3 !%$= =ill C 16 !%$=

EXPERIMENT 7

Ti#l": El"c#$oc+"!i#$' F%$%*%' L%


12/24

P$po": To *"#"$!i&" #+" p"$c"%;" p$i#' o, copp"$ !"#%l '"l"c#$ol'i

M%#"$i%l:

App%$%#:

.5 !ol*!0copp"$ lp+%#" ol#io&@ #o pi"c" o,

copp"$ pl%#"@ p$op%&o&" %&* *i#ill"* %#"$

A!!"#"$@ $+"o#%#@ i#c+@ po"$ p%c=@ #op%#c+@ +%i$*$'"$@ "l"c#$ic %l%&c"@ !"%$i&; c'li&*"$ @ "%="$@ %&*p%p"$@ co&&"c#i&; i$" i#+ c$oco*il" clip5

I$o*c#io&:

F%$%*%' $# l% #%#" #+%# #+" %!o (M) o, %#%&c" p$o*c"* %# %& "l"c#$o*" i *i$"c#l'p$opo$#io&%l #o #+" D%i#' o, "l"c#$ici#' () #+%# p%"#+$o;+ #+" "l"c#$ol'#"5

M A&* 1I # +"$" 1 D%i#' o, "l"c#$ici#' i&colo! (C) I 1 c$$" i& %!p"$" (A) # 1 #i!" i& "co&* ()

T+" ,%$%*%' co%@ F i #+" c+%$;" o, . !ol o, "l"c#$o&F 1 NA " +"$" NA 1 ABo;%*$o co% 1652 .02!ol0.

" 1 c+%$;" o& o&""l"c#$o& 1 .56 .0.9

7 #%#" F%$%*%' Fi$# L% %&* #+"& F 1L "8

P$oc"*$":

.5 T+" copp"$ "l"c#$o*" %$" cl"%&"* i#+ %&* p%p"$25 T+" "l"c#$o*" %$" l%"l"* %&o*" %&* c%#+o*"5 T+" c%#+o*" "l"c#$o*" i "i;+"* i#+ #+" "l"c#$ic%l%&c" %&* #+" $"%*i&; $"co$*"*45 c! o, copp"$ lp+%#" ol#io& i !"%$"* i#+ %!"%$i&; c'li&*"$ %&* #+"& po$"* io % .c!"%="$35 T+" "l"c#$ic ci$ci# % +o& "lo i "# p

65 T+" i#c+ i clo"* %&* #+" $+"o#%# i Dic=l' "# #o%llo % c$$" o, 53A #o p% #+$o;+ #+" ci$ci#Q5 A# #+" %!" #i!"@ #+" #op %#c+ i #%$#"* %&* #+""l"c#$ol'i p$oc" i %llo"* #o coi&" ,o$ !i"5 A,#"$ !i" @ #+" c%#+o*" i #%="& o# o, #+""%="$ %&* $i&"* i#+ *i#ill"* %#"$5N"# #+" c%#+o*" i*ipp"* io % "%="$ o, p$op%&o&" %&* #+"& *$i"* i#+ %+%i$ *$'"$5


13/24

95 T+" cool"* c%#+o*" i #+"& "i;+"* %;%i& %&* #+"$"%*i&; $"co$*"*

i%;$%!:.5Co$$"c# *i%;$%! i#+ %ll #+" %pp%$%#

25El"c#$o*" l%"l"* copp"$ %&* "l"c#$ol'#" copp"$lp+%#" ol#io&5Co!po&" o, #+" ci$ci# l%"ll"* %!!"#"$@ i#c+@$+"o#%# %&* po"$ o$c"5

>.>E.>C.

R"l#: %) M% $"%*i&;

M% o, c%#+o*" %,#"$ #+" "p"$i!"/;M% o, c%#+o*" ",o$" #+" "p"$i!"/;M% copp"$ *"poi#"*/; a

(.) Co$c# #%l" % %oB"(.) R"%*i&; o, !% co$$"c# #o #o *"ci!%l pl%c"

() C%lcl%#io&%i#' o, c+%$;" #+%# o 1 I # 153 . 1 9CNo5 o, !ol o, copp"$ *"poi#"* 1a/653 1b

!ol copp"$ $"Di$"* 9C. !ol copp"$ $"Di$"* ./b 91dC

< p$i#' o, copp"$ 1 9/* 653 < 1 e CS.>MC.

>T.>P.

C.C.

C.Co&clio&

F$o! #+" "p"$i!"@ #+" p"$c"%;" p$i#' o, copp"$ 1e. P2@ Alo$ &2!i;+#" p$""

C.

(*)(ii) W+i#" p$"cipi#%#"@ p$"cipi#%#"*o" &o# *iolB" i& "c" o,%D"o %!!o&i%o" &o# *iolB" i& %D"o%!!o&i! c+lo$i*"

>. &2i &o# p$"" /P2o$ Al!i;+# "p$""

C.

(*)(iii) R"**i+ ol#io&

C+ocol%#" p$"cipi#%#" ,o$!"*

>. CHCOO0p$"" C.

(*)(iB) W+i#" p$"cipi#%#" (i&co&c"$%#"* ol#io&)P$"cipi#%#" *iolB"* i& *il#"&i#$ic %ci*

>. CHC0p$"" C.

(*)(B) W+i#" p$"cipi#%#" >. Al&o# p$"" o$ Pp$""

C.

(*)(Bi) Y"llo p$"cipi#%#">"co!" o$%&;" ol#io& o&%**i&; *il#" +'*$oc+lo$ic %ci*

>. P2p$"" C.

C%#io&1 P2 A&io& 1 CHCOO0

() M;Cl2

T"# O"$B%#io& "*c#io&H"%# % !%ll %!o o,oli* A2 %&* #+"$o&;l'

No c+%&;"* o"$B"* >. CO20%&*NO0&o#p$""

C.

A** co&c"$%#"* W+i#" ,!" >. Aci*ic ;% C.


15/24

lp+$ic %ci* o& oli*A2

Moi# l" li#! p%p"$#$&"* #o $"*/+i#",!" i#+co&c"$%#"* %!!o&i%ol#io&

"BolB"*p$o%l' HCl;%@Cl0p$""

iolB" oli* A2 i&*i#ill"* %#"$5""p%$%#" po$#io& ,o$#"#(i) #o (iB)(i) A** %D"o o*i!+'*$oi*" %&* #+"& i&"c"

W+i#" p$"cipi#%#"@p$"cipi#%#" *o" &o#*iolB" i& "c"

>. >%2@ C%2o$M;2!i;+#" p$""

C.

(ii)A** %D"o %!!o&i%%&* #+"& i& "c"

W+i#" p$"cipi#%#"@p$"cipi#%#" *o" &o#*iolB" i& "c"

>. M;2

(iii) A** ilB"$ &i#$%#"

ol#io& %&* ,ollo"* '*il#" &i#$ic %ci*

W+i#" p$"cipi#%#"@

p$"cipi#%#" *o" &o#*iolB" i& *il#" &i#$ic%ci*

>. Cl0p$"" C.

(iB)A** %D"ol"%*(II)&i#$%#"

W+i#" p$"cipi#%#" >. Cl0p$"" C.

M%i!! !%$= ,o$ =ill >13 !%$=@ =ill C16 !%$=


16/24

EXPERIMENT 9

Topic: %li#%#iB" %&%l'i

P$po": To *"#"$!i&" #+" c%#io& %&* %&io& o, i&o$;%&ic %l#

(%) To i*"i,' #o c%#io&

T"#

O"$B%#io& "*c#io&

-(i)

W+i#" p$"cipi#%#"@ *iolB"* i&"c"

O& +"%#i&;@ ;% "BolB"* #$&"*!oi# $"* li#! p%p"$ #o l"/+i#" ,!" i#+ +'*$o;"& c+lo$i*"

B%po$

>. &2@ Alo$ P2!i;+# "p$""% NH"BolB"*5 NH4p$""

(ii) No c+%&;" o"$B"* >. P2&o# p$"" o$ &2o$Al !i;+# " p$""

(iii) Y"lloi+ o$%&;" p$"cipi#%#" >. Alp$""(iB) No p$"cipi#%#"

W+i#" p$"cipi#%#" +"& +"%#"*>. Alp$""

(B) W+i#" p$"cipi#%#"O& +"%#i&; @ ;% "BolB"* #$&"*!oi# $"* li#! p%p"$ #o l"

>. Alp$""% NH"BolB"*% NH4p$""

C%#io&: Al %&* NH4

() I0

%&* NO0

T"# O"$B%#io& "*c#io&.5 A** co&c"$%#"*lp+$ic %ci* o& oli* A2%&* #+"& +"%#

2

C+ocol%#" ,!"

P$pl" ,!" "BolB"*+"& +"%#"*

>.

NO2;%NO20@ NO0p$""Io*i&"B%po$


17/24

I0p$o%l'p$""

25 iolB"* oli* A2 i&*i#ill"* %#"$5 ""p%$%#" po$#io& ,o$ #"#

(i) #o (iB)

2

25(i) A** %D"o P(N)2%&* #+"& +"%# %&* #+"&cool i#5

2

Y "llo p$"cipi#%#"*iolB"* +"& +"%#"*5Y"llo c$'#%l ,o$!"*+"& cool"*

>.

I0 p$""

2(ii)A** %D"o N%OCl%&* #+"& CCl4

2

T+" lo"$ o$;%&ic l%'"$i p$pl" i& colo$

>.

I0p$""

25(iii) A** "B%$*% %llo'

2(iB) A** *il#" lp+$ic%ci*@ i$o&(II) lp+%#" %&*

#+"& co&c"$%#"*lp+$ic %ci*

2

2

A& i$$i#%#i&; %!!o&i%!"ll

>$o& $i&; ,o$!"*

>.

>

.

NH;%NO20%&* NO0NO0 o$ NO20

p$""

2(B) A** F"Cl%&* +"%# 2

No c+%&;" >.

NO20&o#p$""

M%i!! !%$= ,o$ =ill > 1 3 !%$= =ill 1 9 !%$=


18/24

EXPERIMENT 10

Topic: T"c+&iD"0S'+"i

P$po":To *"#"$!i&" #+" p"$c"%;" o, %li!i&i! i& % %!pl" ' !"%&

o, #+" p$"p%$%#io& o, % co!pl" co!po&* o, %l!i&i! i#+ 0

+'*$o'Di&oli&"

(%)()

R"%*i&;(i) To *"ci!%l pl%c"(ii) Co$$"c# p%c"(iii) Mi& co$$"c#

To#%l 1 >6

>P.>CS.>MC.

-(i)

To !%=" $" #+" $"%c#io& ;o" #o co!pl"#io& %&* #+"!%i!! %!o o, p$"cipi#%#" i o#%i&"*

C.

(ii) T+" olili#' o, #+" co!pl" i lo i& col* %#"$/T+" co!pl"*o" &o# *iolB" %&* " lo#

C.

(*) R"p"%# #+" *$'i&; p$oc" i& #+" oB"& il % co% !% io#%i&"*

C.

(") RMM14395 C.(,) M% o, Al / RMM .< 1 y C.(;) M% o, p$"cipi#%#"/ M% o, %!pl" y 1 C.

M%i!! !%$= ,o$ =ill > 13 !%$= =ill C 1 6 !%$=


19/24

ANSWER SCHEME FORSCHOOL0>ASE ASSESSMENT

CHEMISTRY PRACTICAL

PAPER 4 (962/4)

THIR TERM


20/24

EXPERIMENT 11


P$po": To #*' #+" $"%c#io& o, %lco+ol %&* c%$o&'l co!po&*

T"# o& A. (%lco+ol)

T"# O"$B%#io& "*c#io&- 2 l%'"$ %$" ,o$!"*

F$i#' !"llP$o%l' %lco+ol

(*) P$pl" colo$ *"colo$i" P$i!%$' %lco+ol #oo(") Y"llo p$"cip%#%#" ,o$!"* Co&$! %lco+ol@ CH0CH0

I OH

T"# o& A2 (P$op%&%l)

T"# O"$B%#io& "*c#io&(,) Y"llo/ o$%&;" p$"cipi#%#io& "#o&" o$ %l*"+'*"

("#+%&%l) p$""(;) >$ic= $"* p$"cipi#%#" ,o$!"* Alip+%#ic %l*"+'*"

p$""(+) SilB"$ !i$$o$ o$ p$"cipi#%#"

,o$!"*

Al*"+'*" @ CHC H

p$" II O

(i) P$pl" colo$ *"colo$i" Al*"+'*" p$""(U) No '"llo p$"cipi#%#" ,o$!"* No CH0C0H

II O


21/24

To "p%$%#" #"# o& A ( P$op%&o&")

T"# O"$B%#io& "*c#io&(=) Y"llo o$%&;" p$"cipi#%#" C%$o&'l ;$op@ C1O

p$""

(l) No $ic= $"* p$"cipi#%#" o$ &oo"$B"%l" c+%&;" No %l*"+'*" p$""

(!) No ilB"$ !i$$o$ ,o$!"* No %l*"+'*" p$""(&) P$pl" colo$ &c+%&;"* o$

p$pl" colo$ $"!%i&Co&$! ="#o&"@ 0C1Op$"" o$ &o %l*"+'*"p$""

(o) Y"llo p$"cipi#%#" ,o$!"* CH0C1O p$"" I H

T"# o& A4 ("#o&" )

T"# O"$B%#io& "*c#io&T"# i&; NPiolB" %o# 53c! o$ 3!;o, A4 i& 2 c! 93< "#+%&ol5 A**2 #o *$op o, #+i !i#$" io#+" #"# #" co%i&i&; c!o,2@40*i&i#$op+"&'l+'*$%i&"$"%;" S+%=" #+" #" %&*o"$B" #+" ,o$!%#io& o, %&'

p$"cipi#%#"5 I, &o p$"cipi#%#" ,o$!i!!"*i%#"l' %llo #+" !i#$" #o#%&* ,o$ 30. !i"5

Y"llo o$%&;"p$"cipi#%#"

C%$o&'l ;$op@0C1O p$""

Toll"& $"%;"A** 20 *$op o$ 5.; o, A4 #o" #"#"* #o #+" ,$"+l' p$"p%$"*Toll"& $"%;"S+%=" #+" #"lol' %&* &o#" #+" ,o$!%#io& o,ilB"$ !i$$o$ o$ p$"cipi#%#"5I, #+"$"i &o p$"cipi#%#" %,#"$ . !i"@

%$! #+" !i#$" i& % %#"$ %#+%# oC ,o$ 3 #o . !i"

No ilB"$ !i$$o$,o$!"*

No %l*"+'*"p$""

M&O4/H

A** .02 *$op o, %ci*i"*po#%i! !%&;%&%#" (VII) #o 2c!o, A4 %&* +"%# ;"l'5

P$pl" colo$&c+%&;"* (p$pl"colo$ $"!%i&)

Co&$! ="#o&"@0C1O p$"" o$&o %l*"+'*"p$""


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Io*o,o$! #"#

A# l"%# #"# i *o&"

M%i!! !%$= ,o$ =ill > 1 3 !%$= =ill C 1 6 !%$=

EXPERIMENT 12


P$po": To #*' #+" $"%c#io& o, o$;%&ic &i#$o;"& co!po&* (%!i*" %&*

%!i&")

T"# o& A.

T"

#

O"$B%#io& "*c#io&

-(i)

(ii)

o" &o# *iolB" o$ &*iolB"*

$""& colo$ $"!%i&

N"#$%l o$ %!i*"p$o%l' p$""

(*) No c+%&;" o$ &o o"$B"%l"c+%&;"

A!i*" p$""

(") I, $o& ;% "BolB"*(&o$"%c#io&)

I, !"ll ;% *"#"c#"* (+%B"$"%c#io&)

I, Bi&";%$ !"ll

HNO2

A!!o&i% ;%

(,) Vi&";%$ !"ll A!i*" p$""(;)(i)

Vi&";%$ !"ll

Vi&";%$ !"ll

A!i*" p$""

A!i*"


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(ii) JJJJJJJJ JJJJJJJJ5I*"i,' AI: 0 C 1O $i#" #+" ,&c#io&%l ;$op o, %!i*"@ "#+%&%!i*"

II

NH2

T"# o& A2

T"#

O"$B%#io& "*c#io&

(+) $""& c+%&;" #o l" >%" p$""(i) 2 l%'"$ ol#io& ,o$!"* A!i&" p$""(U) >l" o, ;% Ni#$o;"& ;% (N2)

p$""(=) No p$"cipi#%#" ,o$!"* (&o

c+%&;")

No %$o!%#ic %!i&" o$

%lip+%#ic %!i&" p$""o$ p$i!%$' %!i&"p$""

I*"i,' A2 1 .0 >#%&%!i&"/p$i!%$' %!i&"

M%i!! !%$= ,o$ =ill >1 3 !%$= =ill C1 6 !%$=

EXPERIMENT 13

Topic: T"c+&iD" 0S'+"i

P$po": To p$"p%$" % %!pl" o, 20(40+'*$o'p+"&'l%o) "&oic %ci*

- El"c#$op+ilic #i##io& C.(*) Fo$!%#io& o, #+" p+"&oi*" io& @C6H3O0 C.(") To p$"B" #+" *"co!poi#io& o, *i%o&i! %l# C.(,) No o, !ol o, 1 54 /.Q 1524 !ol @ RMM

C6H4COOH1.Q

F$o! "D%#io&@

. !ol $"%c#% ,o$!"* . !ol p$o*c#So 524 !ol 524 !ol

M% 1 524 RMM C6H4COOHN2C6H4OH 1 524 242 1 65.6;

C.

C.

(;) P"$c"%;" o, 20(40+'*$o'p+"&'l%o) "&oic %ci* C.


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1 M% o#%i&"*/ 65.6 .1 1 3 !%$= =ill C 1 6 !%$=

Documents

Answer Scheme Practical 2012-V2003