Chemistry practicals

,
,
, SHORT PROCEDURE:
S.No. CONTENT TITRATION – I TITRATION – II
1. Burette Solution KMnO4 KMnO4
2. Pipette Solution 20ml of Std FAS solution 20ml of unknown FeSO4 solution
3. Acid to be added 20ml of 2N H2SO4 (approx) 20ml of 2N H2SO4 (approx)
4. Temperature Lab Temperature Lab Temperature
5. Indicator Self- Indicator (KMnO4) Self- Indicator (KmnO4)
Appearance of permanent Appearance of permanent pale
6. End Point
pale Pink Colour Pink Colour
7. Equivalent weight of FeSO4 = 278


𝑚𝑎𝑠𝑠/𝑙𝑖𝑡𝑟𝑒 43.2
Normality of standard ferrous ammonium sulphate solution = = = 0.1102 N
𝐸𝑞𝑢𝑖𝑣𝑎𝑙𝑒𝑛𝑡 𝑚𝑎𝑠𝑠 392

TITRATION – I :
Std FAS Vs Link KMnO4: Indicator: Self (KMnO4)
S.No. Volume of Std Burette Readings (ml) Vol of KMnO4 ( ml) Concordant Value (ml)
FAS (ml) Initial Final

1. 20 0 19.5 19.5 19.5

2. 20 0 19.5 19.5


CALCULATIONS:
Volume of Std FAS solution (V1) = 20 ml.
Normality of Std FAS solution (N1) = 0.1102 N
Volume of KMnO4 (link) solution (V2) = 19.5ml.
Normality of KMnO4 (link) solution (N2) = ? N.


According to Normality equation: V1 N1 = V 2 N2

𝑉1 𝑁1 20 𝑥 0.1102
N2 = = = 0.1130 N
𝑉2 19.5



Normality of KMnO4 (link) solution ( N2) = 0.1130 N.




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