Quantitative Analysis of Organic Compounds
Chemistry ⇒ Carbon and Organic Chemistry
Quantitative Analysis of Organic Compounds starts at 11 and continues till grade 12.
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A 0.2 g sample of an organic compound gave 0.36 g of CO2 and 0.15 g of H2O on combustion. Calculate the percentage of hydrogen in the compound.
A 0.25 g sample of an organic compound containing chlorine was analyzed by the Carius method and gave 0.15 g of AgCl. Calculate the percentage of chlorine in the compound. (Atomic mass: Ag = 108, Cl = 35.5)
A 0.25 g sample of an organic compound gave 0.44 g of CO2 and 0.18 g of H2O on combustion. Calculate the percentage of carbon in the compound.
A 0.3 g sample of an organic compound containing nitrogen was digested by the Kjeldahl method. The ammonia evolved neutralized 25 mL of 0.1 N H2SO4. Calculate the percentage of nitrogen in the compound.
A 0.4 g sample of an organic compound gave 0.22 g of BaSO4 in the Carius method. Calculate the percentage of sulfur in the compound. (Atomic mass: Ba = 137, S = 32, O = 16)
A 0.5 g sample of an organic compound gave 0.2 g of AgBr in the Carius method. Calculate the percentage of bromine in the compound. (Atomic mass: Ag = 108, Br = 80)
A 0.6 g sample of an organic compound gave 0.3 g of AgCl in the Carius method. Calculate the percentage of chlorine in the compound. (Atomic mass: Ag = 108, Cl = 35.5)
Describe the process of estimating halogens in an organic compound using the Carius method.
Describe the role of potassium dichromate in the estimation of carbon and hydrogen.
Describe the steps involved in the estimation of sulfur in an organic compound using the Carius method.
Explain the principle of the Kjeldahl method for nitrogen estimation in organic compounds.
Explain why anhydrous calcium chloride is used in a U-tube during the estimation of hydrogen.
Explain why potassium hydroxide is used in the absorption of CO2 during the estimation of carbon.
Explain why the Kjeldahl method cannot be used for compounds containing nitrogen in the form of nitro, azo, or in the ring structure.
