Saved Bookmarks
| 1. |
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 isA. 0.78B. 0.98C. 0.89D. 0.79 |
|
Answer» 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%` |
|