chemistry 02

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Experiment Number: 02Name of the Experiment: Standardization of CommercialHydrochloric Acid solution ith standardSodium Hydroxide solution

Course: CHE!"##$

Name: A%N%!%Ashrafuzzaman%&oll: 200'0(0$0)roup: A2

*artner+s &oll: 200'0(0$,-epartment: EEE

-ate of *erformance: 02"0#"200,

-ate of Submission: 0."0#"200,


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Chemical &ea5ents:1.

Standardi!ed $a"H solution2. HCl solution3. 5istilled %ater4. "xalic Acid

2. (henolphthalein 3. )ethyl "range

Experimental -ata:

Standardization of NaOH solution with standardOxalic Acid solution

Number of

Obser-

-vation

Volume of

NaOH

inml

Burettereading

in mlVolume

ofAcid

inml

Average

Readi

nginml

StrengthOf

NaOHN

nitialReadi

ng

!inalReadi

ng

6* *6 6./ *6.0 *6.*7.839 6.6783

96- *6 *6.0 -6.* 7.96/ *6 -6.* -7.7 7.8

Standardization of H"l solution with standard NaOHsolution

Number of

Burettereading

in mlVolume

ofAvera

geStreng

th


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Obser--

vation

Volume of

NaOHin

ml

Acidinml

Readinginml

OfH"lN

nitialReadi

ng

!inalReadi

ng

6* *6 *.7 -*./ *7.0*7.-// 6.62*/6- *6 -*./ 06.3 *7./

6/ *6 2.7 -0.7 *7.6

Calculation: "

:e ,no% that 6 acid 7 S acid 8 6 base7 S base

5etermination of the normality of $a"H ;##Here V acid = 9.867 ml

S acid = 0.1 N

V base = 10 ml

S base = ?

So, S base = ( 9.867 X 0.1) /10 N

= 0.09867 N

5etermination of normality of HCl ;Here

V acid = 19.233ml

S acid = ?

V base = 10 ml

S base < 6.67839 $So S HCl =dilute>< = 6.67839 ? *6 > @ *7.-// < 6.62*/ $

%e also ,no% V concen!aedX S concen!aed= V dil"eX S dil"e,

Here1 HCl=concentrated>< -.* mlS HCl=concentrated><

1 HCl=dilute> < *66 ml S HCl=dilute> < 6.62*/ $so S HCl=concentrated>< = *66 ? 6.62*/ > @ -.0

< -.*/93 $


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ut in the given HCl solution eBual amount of %ater andhydrochloric acid %ere present i.e. %ater ; hydrochloricacid %as *;*.

So the actual strength of HCl


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-> Another cause of error may rise from faulty burettereading.

'f these causes could be avoided %e could have got moreaccurate result of the strength of Commercial

Hydrochloric Acid.

chemistry 02

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