3-92-g-of-ferrous-ammonium-sulphate-are-dissolved-in-100-ml-of-water-20-ml-of-this-solution-requires-18-ml-of-potassium-permanganate-during-titration-for-complete-oxidation-The-weight-of-KMnO-4-pre

Question Number 18186 by Tinkutara last updated on 16/Jul/17

3.92 g of ferrous ammonium sulphate

are dissolved in 100 ml of water . 20 ml

of this solution requires 18 ml of

potassium permanganate during

titration for complete oxidation . The

weight of {KMnO}_{4} present in one litre

of the solution is

Answered by sandy_suhendra last updated on 16/Jul/17

Commented by Tinkutara last updated on 16/Jul/17

Thanks Sir!

Commented by sandy_suhendra last updated on 16/Jul/17

3.92 gram ferrous amonium sulfate = \frac{3.92}{392} = 0.01 mole

in 20 ml water = \frac{20}{100} \times 0.01 = 0.002 mole

mole {KMnO}_{4} = \frac{2}{10} \times 0.002 = 4 \times 10^{- 4} mole

{KMnO}_{4} in 1 litre = \frac{1000}{18} \times 4 . 10^{- 4} = 0.022 mole / litre

= 0.022 \times (39 + 55 + 4.16) = 3.476 gram / litre

Answered by Tinkutara last updated on 20/Jul/17