An organic compound was analysed by Duma’s method. 0.45 g of the compound on combustion gave 48.6 ml nitrogen at 27oC and 756 mm pressure. Calculate the percentage of nitrogen.
V1 = 48.6 ml, V2 = ?
P1 = 756 mm, P2 = 760 mm
T1 = 27 + 273, T2 = 273 K
= 300 K
Applying general gas equation,
Volume of nitrogen at STP,
= 43.99 ml.
Mass of organic compound = 0.45 g
Percentage of nitrogen in the compound
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0.92 g of an organic compound containing carbon, hydrogen and oxygen was analysed by combustion method. The increase in mass of the U-tube and the potash bulbs at the end of the operation was found to be 1.08 g and 1.76 g, respectively. Determine the percentage composition of the compound.
An organic substance (0.2115 g) on complete combustion gave 0.4655 g of carbon dioxide and 0.2533 g of water. Determine the percentage composition of the compound.
An organic compound on analysis gave the data : 0.25 g of the compound on complete combustion gave 0.37 g of CO2 and 0.2 g of water.
0.2 g of an organic compound was analysed by Kjeldahl’s method. Ammonia evolved was absorbed in 60 ml N/5 H2SO4. Unused acid required 40 ml of N/10 NaOH for complete neutralisation. Find the percentage of nitrogen in the compound.
1.216 g of an organic compound was reacted under Kjeldahl’s method and ammonia evolved was absorbed in 100 ml N H2SO4. The remaining acid solution was made up to 500 ml by addition of water 20 ml of this dilute solution required 32 ml of N/10 caustic soda solution for complete neutralisation. Calculate the percentage of nitrogen in the compound.
0.5264 g silver bromide is obtained from 0.5124 g of an organic compound. Calculate the percentage of bromine in the compound.
0.1170 g of an organic compound on heating with conc. HNO3 and silver nitrate in Carius furnace gave 0.42 g of AgCl. Find the percentage of chlorine in the compound.
On heating 0.32 g of an organic compound with concentrated nitric acid and barium chloride, 0.932 g barium sulphate was obtained. Calculate the percentage of sulphur in the given compound.
6 g of an organic compound containing oxygen is heated with graphite and carbon monoxide formed is quantitatively converted to 8.8 g CO2 on reaction with I2O5. Calculate percentage of oxygen in the compound.