Practice question
Question
In Kjeldahl’s method, 0.42 g of a compound produced ammonia that neutralized 15 mL of 0.2 M H₂SO₄. What is the percentage of nitrogen?
Explanation
Moles of H₂SO₄ = 0.015 × 0.2 = 0.003. Moles of NH₃ = 0.006 (2H per H₂SO₄). Mass of N = 0.006 × 14 = 0.084 g. Percentage = (0.084/0.42) × 100 = 20%.
Related blogs
Guides and insights connected to this topic
Cucumber Mosaic Virus (CMV): Structure, Genome, Symptoms, Disease Cycle and Management
Cucumber Mosaic Virus (CMV): Introduction and Importance Cucumber Mosaic Virus (CMV) (plant-infecting RNA virus) is one of the most economic...
Zoonotic Spillover in Bats: Causes, Consequences, and Future Preparedness
Bats: General Characteristics and Classification Bats are small mammals capable of true sustained flight. They belong to the second-largest...
Human Astrovirus- An Introduction
Structure of Human Astrovirus Human astrovirus (virus causing gastroenteritis in humans) falls under Astroviridae (virus family) and genus M...