Preparation & Standardization of 1N HCl Solution: Glassware, Procedure, & Calculations, Study notes of Chemistry

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Preparation and Standardization

of 1

N HCl Solution

Glass ware and instruments:Glass

ware and instruments:

preparation

beaker

glass stirrer

graduated cylinders

washing bottle

volumetric flask

fume hood

Preparation and Standardization

of 1

N HCl Solution

Glass ware and instruments:Glass

ware and instruments:

standardization

conical flask

burette

burette stand

burette clamp

wire gauze

Bunsen burner

tripod stand

Preparation and Standardization

of 1

N HCl Solution

p

reparation of 100 mL of 1

N HCl solution

p

p

Dilute 9 mL of HCl with distilled water to a final

l

f 100

L

i

100

L

l

t i

volume of 100 mL using a 100 mL- volumetricflask.

N

1

:the normality of concentrated HCl used

V :the volume of concentrated HCl to be used for dilution V

1

:the volume of concentrated HCl to be used for dilution

N

2

:the requested normality of HCl (

N in our experiment)

V

2

:final volume after dilution (100 mL in our experiment)

Preparation and Standardization

of 1

N HCl Solution

N

:the

normality

of

the

concentrated

acid

th

i ht b

i ht

t

ti

f th

id

% : the weight by weight concentration of the acid

sp.

gr.

the

specific

gravity

of

the

acid

eq. wt. :the equivalent weight of the acid eq w

e equ v

e

we g

o

e

c d

Preparation and Standardization

of 1

N HCl Solution

titration apparutus

pp

Preparation and Standardization

of 1

N HCl Solution

burette adjusment

j

Preparation and Standardization

of 1

N HCl Solution

p

rocedure

p

wash the burette with the D. W. and the titrant (HCl)fill th

b

tt

ith HCl t

l

l ( dj

t it)

fill

th

e burette with HCl to a level (adjust it)

dissolve the primary standard (Na

2

CO

3

) in enough D. W.

(100 mL) using the conical flask(

g

add 2 drops of methyl red

start titration by adding HCl drop wise with continuous ti

i

til th

l ti

b

f i t

i k

stirring until the solution becomes faint pink ƒ

heat the solution to boiling so that the colour changes

back into yellow, cool, and titrate again until the faint pink

y

g

p

colour is no longer affected by boiling ƒ

record

the

volume

of

HCl

used

and

calculate

the

lit

normality

Preparation and Standardization

of 1

N HCl Solution

p

rocedure

p

d

i t

end point (faint pink)