Question

Calculate the % of MnO2 in a sample of pyrolusite ore, 1.5 g which was made to

react with 10 g of Mohr’s salt (FeSO4.(NH4)2SO4. 6H2O) and dilute H2SO4. MnO2 was

converted 2 Mn2+ . After the reaction the solution was diluted to 250 ml and 50 ml of

this solution, when titrated with 0.1 N K2Cr2O7, required 10 ml of the dichromate

solution.

Please answer with explanation.​

Answer 1

Answer:

hey mate

Explanation:

Page 1

FeSO4 + (NH4)2 SO4 + 6H2O —→ FeSO4 . ( NH4)2 ... 6H2O. Ferrous ammonium sulphate (Mohr's salt) ... solutions of ferrous sulphate and aluminium sulphate in water, 2-3 mL ..