Saved Bookmarks
| 1. |
How do you determine Sulphur , Phosphorous and Oxygen quantitatively in an organic compound ? |
|
Answer» Solution :Estimation of Oxygen : A known weight of organic compound is DECOMPOSED by heating in a STREAM of nitrogen gas . The mixture of gaseous products containing oxygen is passed over red hot cake to convert all oxygen in those oxides to CO . Then the mixture is passed through hot iodine pentoxide to convert CO into `CO_(2)` and iodine liberates . Compound `overset("heat")(to)O_(2) +` other gaseous products `2 C + O_(2) overset(1373 K)(to) 2 CO, I_(2) O_(5) + 5 CO to I_(2) + 5 CO_(2)` (red hot ) Calculation : Mass of organic compound = a g Mass of carbon oxide = b g 44 g of `CO_(2)` CONTAINS 32 g of oxygen . `therefore` b g of `CO_(2)` contains ................. ? `= (b xx 32)/(44)` g of oxygen a g of organic compound contains `(b xx 32)/(44)` g of `O_(2)` . `therefore ` 100 g of organic compound contains ......... ? `(100 xx b xx 32)/(a xx 44)` of oxygen (% of oxygen ) |
|