8.10.2 - Nitrogen
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Practice Questions
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What are the two methods to estimate nitrogen in organic compounds?
💡 Hint: Think about the names of the chemical processes discussed.
Why is nitrogen important for plants?
💡 Hint: Consider the role of nitrogen in biological systems.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What method involves heating organic nitrogen compounds with copper oxide?
💡 Hint: Think about the name of the method associated with heating.
True or false: The Kjeldahl method directly measures nitrogen gas.
💡 Hint: Consider how each method interacts with ammonia.
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Challenge Problems
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A research chemist uses the Dumas method for nitrogen estimation on a 1g sample that produces 0.5L of nitrogen gas at STP. Calculate the mass percentage of nitrogen in the original sample.
💡 Hint: Use the relation that 1 mole of gas occupies 22.4L at STP.
In the Kjeldahl method, a 0.2 g sample yields 15 mL of ammonia when treated with sulfuric acid. How would you calculate the percentage of nitrogen from the given data?
💡 Hint: Remember the stoichiometry of ammonia to nitrogen conversion.
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