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7g of an organic compound containing Nis treated by kjeldahl method and NH3 released is absorbed in 80 ml semi molar H2SO4. Volume of resulting solution is made to 400ml by dilution 20ml of this solution requires 30ml of N/20 NaOH for complete neutralisation. Percentage of N in organic compound is?
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7g of an organic compound containing Nis treated by kjeldahl method an...
Kjeldahl Method for Determination of Nitrogen
Introduction:
The Kjeldahl method is a widely used technique for the determination of nitrogen content in organic compounds. It involves digestion of the compound with concentrated sulfuric acid, which converts the organic nitrogen into ammonium sulfate. The ammonium sulfate formed is then treated with an alkali solution to liberate ammonia, which is then captured and quantified.
Given Data:
- Mass of the organic compound = 7g
- Volume of semi-molar H2SO4 = 80ml
- Volume of resulting solution = 400ml
- Volume of solution required for neutralization = 20ml
- Volume of N/20 NaOH solution used for neutralization = 30ml
Calculation:
1. Calculation of moles of H2SO4 used:
- Semi-molar H2SO4 means its concentration is 0.5M.
- Moles of H2SO4 = Molarity × Volume in liters
- Moles of H2SO4 = 0.5 × (80/1000) (since volume is given in ml)
- Moles of H2SO4 = 0.04
2. Calculation of moles of NH3 liberated:
- From the neutralization reaction, we know that 1 mole of H2SO4 reacts with 2 moles of NH3.
- Therefore, moles of NH3 liberated = 2 × moles of H2SO4
- Moles of NH3 liberated = 2 × 0.04 = 0.08
3. Calculation of moles of NaOH used:
- The concentration of N/20 NaOH solution is 20/1000 M.
- Moles of NaOH used = Molarity × Volume in liters
- Moles of NaOH used = (20/1000) × (30/1000) (since volume is given in ml)
- Moles of NaOH used = 0.0006
4. Calculation of moles of N in the organic compound:
- From the neutralization reaction, we know that 1 mole of NH3 reacts with 1 mole of NaOH.
- Therefore, moles of N in the organic compound = moles of NH3 = 0.08
5. Calculation of percentage of N in the organic compound:
- Percentage of N = (moles of N/molar mass of organic compound) × 100
- Molar mass of organic compound = mass of organic compound/moles of N
- Molar mass of organic compound = 7/0.08 = 87.5g/mol
- Percentage of N = (0.08/87.5) × 100 = 0.0914%
Conclusion:
The percentage of nitrogen in the organic compound is approximately 0.0914%.
Introduction:
The Kjeldahl method is a widely used technique for the determination of nitrogen content in organic compounds. It involves digestion of the compound with concentrated sulfuric acid, which converts the organic nitrogen into ammonium sulfate. The ammonium sulfate formed is then treated with an alkali solution to liberate ammonia, which is then captured and quantified.
Given Data:
- Mass of the organic compound = 7g
- Volume of semi-molar H2SO4 = 80ml
- Volume of resulting solution = 400ml
- Volume of solution required for neutralization = 20ml
- Volume of N/20 NaOH solution used for neutralization = 30ml
Calculation:
1. Calculation of moles of H2SO4 used:
- Semi-molar H2SO4 means its concentration is 0.5M.
- Moles of H2SO4 = Molarity × Volume in liters
- Moles of H2SO4 = 0.5 × (80/1000) (since volume is given in ml)
- Moles of H2SO4 = 0.04
2. Calculation of moles of NH3 liberated:
- From the neutralization reaction, we know that 1 mole of H2SO4 reacts with 2 moles of NH3.
- Therefore, moles of NH3 liberated = 2 × moles of H2SO4
- Moles of NH3 liberated = 2 × 0.04 = 0.08
3. Calculation of moles of NaOH used:
- The concentration of N/20 NaOH solution is 20/1000 M.
- Moles of NaOH used = Molarity × Volume in liters
- Moles of NaOH used = (20/1000) × (30/1000) (since volume is given in ml)
- Moles of NaOH used = 0.0006
4. Calculation of moles of N in the organic compound:
- From the neutralization reaction, we know that 1 mole of NH3 reacts with 1 mole of NaOH.
- Therefore, moles of N in the organic compound = moles of NH3 = 0.08
5. Calculation of percentage of N in the organic compound:
- Percentage of N = (moles of N/molar mass of organic compound) × 100
- Molar mass of organic compound = mass of organic compound/moles of N
- Molar mass of organic compound = 7/0.08 = 87.5g/mol
- Percentage of N = (0.08/87.5) × 100 = 0.0914%
Conclusion:
The percentage of nitrogen in the organic compound is approximately 0.0914%.
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7g of an organic compound containing Nis treated by kjeldahl method and NH3 released is absorbed in 80 ml semi molar H2SO4. Volume of resulting solution is made to 400ml by dilution 20ml of this solution requires 30ml of N/20 NaOH for complete neutralisation. Percentage of N in organic compound is?
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7g of an organic compound containing Nis treated by kjeldahl method and NH3 released is absorbed in 80 ml semi molar H2SO4. Volume of resulting solution is made to 400ml by dilution 20ml of this solution requires 30ml of N/20 NaOH for complete neutralisation. Percentage of N in organic compound is? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about 7g of an organic compound containing Nis treated by kjeldahl method and NH3 released is absorbed in 80 ml semi molar H2SO4. Volume of resulting solution is made to 400ml by dilution 20ml of this solution requires 30ml of N/20 NaOH for complete neutralisation. Percentage of N in organic compound is? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 7g of an organic compound containing Nis treated by kjeldahl method and NH3 released is absorbed in 80 ml semi molar H2SO4. Volume of resulting solution is made to 400ml by dilution 20ml of this solution requires 30ml of N/20 NaOH for complete neutralisation. Percentage of N in organic compound is?.
7g of an organic compound containing Nis treated by kjeldahl method and NH3 released is absorbed in 80 ml semi molar H2SO4. Volume of resulting solution is made to 400ml by dilution 20ml of this solution requires 30ml of N/20 NaOH for complete neutralisation. Percentage of N in organic compound is? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about 7g of an organic compound containing Nis treated by kjeldahl method and NH3 released is absorbed in 80 ml semi molar H2SO4. Volume of resulting solution is made to 400ml by dilution 20ml of this solution requires 30ml of N/20 NaOH for complete neutralisation. Percentage of N in organic compound is? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 7g of an organic compound containing Nis treated by kjeldahl method and NH3 released is absorbed in 80 ml semi molar H2SO4. Volume of resulting solution is made to 400ml by dilution 20ml of this solution requires 30ml of N/20 NaOH for complete neutralisation. Percentage of N in organic compound is?.
Solutions for 7g of an organic compound containing Nis treated by kjeldahl method and NH3 released is absorbed in 80 ml semi molar H2SO4. Volume of resulting solution is made to 400ml by dilution 20ml of this solution requires 30ml of N/20 NaOH for complete neutralisation. Percentage of N in organic compound is? in English & in Hindi are available as part of our courses for NEET.
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7g of an organic compound containing Nis treated by kjeldahl method and NH3 released is absorbed in 80 ml semi molar H2SO4. Volume of resulting solution is made to 400ml by dilution 20ml of this solution requires 30ml of N/20 NaOH for complete neutralisation. Percentage of N in organic compound is?, a detailed solution for 7g of an organic compound containing Nis treated by kjeldahl method and NH3 released is absorbed in 80 ml semi molar H2SO4. Volume of resulting solution is made to 400ml by dilution 20ml of this solution requires 30ml of N/20 NaOH for complete neutralisation. Percentage of N in organic compound is? has been provided alongside types of 7g of an organic compound containing Nis treated by kjeldahl method and NH3 released is absorbed in 80 ml semi molar H2SO4. Volume of resulting solution is made to 400ml by dilution 20ml of this solution requires 30ml of N/20 NaOH for complete neutralisation. Percentage of N in organic compound is? theory, EduRev gives you an
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