0.515 g of an organic compound containing phosphorus gave 0.214 g of magnesium pyrophosphate in Carius method for the estimation of phosphorus. Calculate the percentage of phosphorus in the given organic compound.

Explanation

Mass of organic compound `=0.515 g`
Mass of magnesium pyrophosphate, `Mg_(2)P_(2)O_(7)=0.214 g`
`{:(Mg_(2)P_(2)O_(7),equiv,2P),(22g,,62g):}`
222g of `Mg_(2)P_(2)O_(7)` are obtained from phosphorus `=62 g`
0.214 g of `Mg_(2)P_(2)O_(7)` are obtained from phosphorus `=(62xx0.214)/222=0.0597 g`
Percentage of phosphorus `=("Mass of phosphorus")/("Mass of organic compound")xx100=(0.0597xx100)/0.515=11.6`.