chemistry investigatory on presence of oxlate ion in guava

8/9/2019 Chemistry Investigatory on Presence of Oxlate Ion in Guava

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Chemistry Project On -

To study the presence of oxalate ions in

Guava fruit at different stages of ripening

BY

NAME: Shivam Singh

ROLL NO:- __________

IN PARTIAL FULLFILLMENT OF

AISSC PRACTICAL EXAM (CHEMISTRY)

KENDRIYA VIDYALAYA BHANDUP (2014-15)

CERTIFICATE


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This is to ceti!" that Shivam Singh o! c#ass $%thA has satis!actoi#"

comete' the &o(ect in chemist" on )esence o! O*a#ate ions &esci+e'

+" the AISSCE co,se in the aca'emic "ea %$.-$/0 I have e*amine' the

&o(ect an' hee+" acco' m" a&&ova# o! it as a st,'" caie' o,t an'

&esente' in the manne e1,ie' !o its acce&tance0 This 'oes not

necessai#" en'ose o acce&t eve" statement ma'e o o&inion e*&esse' o

conc#,sion 'a2n3 +,t on#" signi!ies the acce&tance o! the &o(ect !o the

&,&ose it is s,+mitte' !o0

Ms0 Ra'ha N Ms0 )ami#a )a#

)4T Chemist" )inci&a# 5060 Bhan',&

E*tena# E*amine

ACKNOWLEDGEMENT

I !ee# &o,' to &esent m" investigato" &o(ect in Chemist" on the

to&ic 7To st,'" the &esence o! o*a#ate ion in g,ava !,it80 This &o(ect

2o,#' not have +een !easi+#e 2itho,t the &o&e an' igoo,s g,i'ance o!

m" chemist" teache Ms0 Ra'ha N 2ho g,i'e' me tho,gho,t this &o(ect

in eve" &ossi+#e 2a"0 A &o(ect invo#ves vaio,s ste&s 2hich have to +e


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caie' o,t +" the st,'ent to o+tain the o+sevations an' conc#,'e the

e&ot on a meaning!,# note0 Rigoo,s ha'2o9 has +een &,t in this &o(ect

to ens,e that it &oves to +e the +est0 I ho&e that this &o(ect 2i## &ove to

+e a +ee'ing go,n' !o othes an' 2i## g,i'e them in eve" &ossi+#e 2a"0


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INDEX

Into',ction

Theo"

Re1,iements

Chemica# E1,ations

)oce',e

)eca,tions

O+sevations

Ca#c,#ations

Conc#,sions

Res,#t

INTRODUCTION

4,ava is a common s2eet !,it !o,n' in In'ia an' man" othe

aces ao,n' the 2o#'0Guavasae ants in the M"t#e !ami#"

M"taceae; gen,s )si'i,m meaning


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i&ening0 4,avas have a &ono,nce' an' t"&ica# !agance3 simi#a

to #emon in' +,t #ess in stength0

It is a ca+o*"#ic aci'3 &imai#" !o,n' in ants an' anima#s0 It is

not an essentia# mo#ec,#e an' is e*cete' !omo, +o'"3

,nchange'0 O, +o'" eithe &o',ces o*a#ate on its o2n o convetsothe mo#ec,#es #i9e 6itamin C to o*a#ate0 E*tena# so,ces #i9e

!oo' a#so conti+,te to the acc,m,#ation o! o*a#ate in o, +o'"0 The

o*a#ate &esent in the +o'" is e*cete' in the !om o! ,ine as 2aste0

Too m,ch o! o*a#ate in o, ,ine es,#ts in a me'ica# con'ition

ca##e' h"&eo*a#,ia3 common#" e!ee' to as 9i'ne" stones0 =iet is

#oo9e' ,&on as a &eventive meas,e in a''ition to me'ication to

teat 9i'ne" stones0

THEORYO*a#ate ions ae e*tacte' !om the !,it +" +oi#ing &,#& 2ith 'i#,te

>%SO.0 The o*a#ate ions ae estimate' vo#,metica##"3 +" titating

the so#,tion 2ith 5MnO.so#,tion0 A eagent3 ca##e' the titant3 o! a

9no2n concentation a stan'a' so#,tion; an' vo#,me is ,se' to

eact 2ith a so#,tion o! the ana#"te o titrand3 2hose concentation

is not 9no2n0 ?sing a ca#i+ate' +,ette o chemist" &i&ettings"inge to a'' the titant3 it is &ossi+#e to 'etemine the e*act

amo,nt that has +een cons,me' 2hen the en'&oint is eache'0 The

en'&oint is the &oint at 2hich the titation is comete3 as 'etemine'

+" an in'icato0 This is i'ea##" the same vo#,me as the e1,iva#ence

&oint0The vo#,me o! a''e' titant at 2hich the n,m+e o! mo#es o! titantis e1,a# to the n,m+e o! mo#es o! ana#"te3 o some m,#tie theeo! as in

&o#"&otic aci's;0 In the c#assic stong aci'-stong +ase titation3 theen'&oint o! a titation is the &oint at 2hich the &> o! the eactant is (,st


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a+o,t e1,a# to @3 an' o!ten 2hen the so#,tion ta9es on a &esisting so#i'

co#o, as in the &in9 o! &heno#&htha#ein in'icato

Requirements(i) Apparatus:-

$m# meas,ing !#as9

)est#e an' mota

F,nne#

eighingmachine

Fi#te &a&es

B,ette )i&ette

(ii) Chemicals


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'i# >%SO.

N$; 5MnO.so#,tion

(iii) Guava fruits at dierent staes of ripenin!


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CHEMIC L EQU TIONS

MOLEC?LAR ED?ATIONS0

o %5MnO.>%SO.G 5%SO. %MnSO. %>%O .HO0o >OOC-COO>0%>%O HO G %CO% %>%O J/

IONIC ED?ATIONS0

o MnO.- $K>/e- G Mn% .>%O J%

o C%O.G %CO% %e-J/

o %MnO.- $K> /C%O.%- G %Mn% >%O $CO%


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PROCEDURE

$0 eighe' / g o! !esh g,ava an' c,she' it to a !ine &,#& ,sing

&est#e an' mota0

%0 Tans!ee' the c,she' &,#& to a +ea9e an' a''e' a+o,t / m# 'i#,te

>%SO. to it0

0 Boi#e' the content !o a+o,t $ min,tes0 Coo#e' an' !i#tee' the

contents in a $ m# meas,ing !#as90

.0 Ma'e ,& the vo#,me $ m# +" a''ing ame amo,nt o! 'isti##e'

2ate0

/0 Too9 % m# o! the so#,tion !om the !#as9 an' a''e' % m# o! 'i#,tes,#&h,ic aci' to it0

K0 >eate' the mi*t,e to a+o,t K C an' titate' it against n$;

5MnO. so#,tion ta9en in a +,ette ti## the en' &oint ha' an

a&&eaance o! &in9 co#o,0

@0 Re&eate' the a+ove e*&eiment 2ith / g o! $'a"3 % 'a" an' 'a"

o#' g,ava !,its0


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PREC UTIONS


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1. Thee sho,#' +e no &aa##a* 2hi#e ta9ing meas,ements0%0 S&i##age o! chemica#s sho,#' +e chec9e'0

0 Avoi' the ,se o! +,ette having a ,++e ta& as 5MnO.attac9s

,++e0.0 In o'e to get some i'ea a+o,t the tem&eat,e o! the so#,tion

to,ch the !#as9 2ith the +ac9 si'e o! "o, han'0 hen it +ecomes

,n+eaa+#e to to,ch3 the e1,ie' tem&eat,e is eache'0

/0 A'' a+o,t an e1,a# vo#,me o! 'i#0 >%SO.to the g,ava e*tact to

+e titate' sa" a !,## test t,+e; +e!oe a''ing 5MnO.0

K0 Rea' the ,&&e menisc,s 2hi#e ta9ing +,ette ea'ing 2ith5MnO. so#,tion0

@0 In case3 on a''ition o! 5MnO.a +o2n &&t0 a&&eas3 this sho2s

that eithe >%SO.has not +een a''e' o has +een a''e' in

ins,!!icient amo,nt0 In s,ch a case3 tho2 a2a" the so#,tion an'

titate again0


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OSER! TIONS

$0 eight o! the g,ava !,it !o each time 2as / g0

%0 6o#

,m

e

o!

g,ava e*tact ta9en !o each titation 2as % m#0

.Noma#it" o! 5MnO.so#,tion 2as $$;0

.0 EN= )OINT: Co#o, Changes to &in90

4,ava

So#,tion

B,ette

ea'ing

Initia#

Fina#

Rea'ing

6o#,me o!

5MnO.

Conc,ent

Rea'ing

Ra2 $/ $ $% $K0K

Semi-i&ene' $/ $ $@

Ri&ene' $/ $0 $0%


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C LCUL TION

$0 FOR RA 4?A6A0

N$6$ N%6%

N$ * $ $$; *$%$$ * Noma#it" o! o*a#ate *$; Stength o!

O*a#ate in Fesh 4,ava

e*tact

Noma#it" * E10 mass o!

o*a#ate ion

$0%$ * ..g#t o! 'i#,te'

e*tact 0/$ g L-$

%0 FOR RI)ENE= 4?A6A0

Stength o! o*a#ate in !esh g,ava e*tact

$0$; * ..g#t o! 'i#,te' e*tact

0K$%g L-$


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RESULT

a; The noma#it" o! o*a#ate ions o! :

i; Fesh g,ava so#,tion is $0% m#

ii; Semi-i&en g,ava so#,tion is $0@ m#

iii; Ri&ene' g,ava so#,tion is $0 m#

+; The stength o! o*a#ate ions o! :

i;Fesh g,ava so#,tion is 0/ m#

ii; Semi-i&ene' g,ava is 0K m#

iii; Ri&ene' g,ava is 0K$ m#


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CONCLUSION

The content o! o*a#ate ions in g,ava 2as !o,n' to +e /0K@ &e cent3

2hich is c#ose to the #iteat,e va#,e o! K &ecent0

It 2as a#so notice' that the content o! o*a#ic ions go2s 2ith i&ening o!

g,ava0


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BIBLIO4RA)>Y

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2220sci+'0com

%0 )actica# Chemist" +" La*mi ),+#ications0

0 The Fami#" Enc"c#o&e'ia +" =o#ing 5in'es#e"0
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chemistry investigatory on presence of oxlate ion in guava

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