25.0 g of `FeSO_4. 7H_2O` was dissolved in water containing dilute `H_2SO_4`, and the volume was made up to 1.0 L.25.0 mL of this solution required 20

Question

25.0 g of `FeSO_4. 7H_2O` was dissolved in water containing dilute `H_2SO_4`, and the volume was made up to 1.0 L.25.0 mL of this solution required 20

25.0 g of `FeSO_4. 7H_2O` was dissolved in water containing dilute `H_2SO_4`, and the volume was made up to 1.0 L.25.0 mL of this solution required 20 mL of an `N//10 KMnO_4` solution for complete oxidation.The percentage of `FeSO_4. 7H_2O` in the acidic solution is
A. 0.78
B. 0.98
C. 0.89
D. 0.79

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - C
Mili eq. of `FeSO_4. 7H_2O` in 25 ml =Mili eq. of `KMnO_4` used =2 Milli eq.
Mili eq. of `FeSO_4. 7H_2O` in 1000 ml =80 Mili eq.
mass of `FeSO_4. 7H_2O` in solution =`80/1xx278xx1/1000=22.24` gm
% of `FeSO_4 . 7H_2O=22.24/25xx100=88.96=89%`

4 views Answered 2023-02-05 15:29