Percentage Yield of Nitrogen using Dumas's Method Calculator

Formula Used:

\[ \text{Percent Yield of Nitrogen} = \left(\frac{28}{22400}\right) \times \left(\frac{\text{Volume of N2 at NTP}}{\text{Mass of Compound}}\right) \times 100 \]

Percentage Yield of Nitrogen (%):

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1. What is Percentage Yield of Nitrogen using Dumas's Method?

Definition: This calculator estimates the percentage yield of nitrogen in an organic compound using Dumas's method, which involves measuring the volume of nitrogen gas liberated at NTP.

Purpose: It helps chemists and researchers determine the nitrogen content in organic compounds, which is important for chemical analysis and quality control.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \text{Percent Yield of Nitrogen} = \left(\frac{28}{22400}\right) \times \left(\frac{\text{Volume of N2 at NTP}}{\text{Mass of Compound}}\right) \times 100 \]

Where:

28 — Molar mass of nitrogen gas (g/mol)
22400 — Molar volume of gas at NTP (mL/mol)
Volume of N2 at NTP — Measured volume of nitrogen gas (mL)
Mass of Compound — Mass of the organic sample (g)

Explanation: The formula converts the volume of nitrogen gas to moles, relates it to the nitrogen content, and expresses it as a percentage of the sample mass.

3. Importance of Nitrogen Percentage Calculation

Details: Accurate nitrogen content determination is crucial for characterizing organic compounds, calculating empirical formulas, and quality control in chemical industries.

4. Using the Calculator

Tips: Enter the volume of nitrogen gas collected at NTP (in mL) and the mass of the organic compound (in grams). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is NTP in this context?
A: NTP stands for Normal Temperature and Pressure (20°C, 1 atm), where 1 mole of gas occupies 22400 mL.

Q2: Why is 28 used in the formula?
A: 28 is the molar mass of nitrogen gas (N2), which contains two nitrogen atoms (14 g/mol each).

Q3: What's the accuracy of this method?
A: Dumas's method typically has an accuracy of ±0.3% when performed carefully under controlled conditions.

Q4: Can this method be used for all nitrogen-containing compounds?
A: It works best for compounds that completely decompose to release nitrogen gas. Some complex compounds may require modified procedures.

Q5: How do I collect the nitrogen gas volume?
A: The sample is combusted in a controlled environment, and the nitrogen gas volume is typically measured using a gas burette or similar apparatus.