.00 mL of a nitric acid solution of unknown concentration is pipetted into a 125-mL Erlenmeyer ask and 2 drops of phenolphthalein are added. A 0.150M sodium hydroxide solution (the titrant) is bocd to titrate the nitric acid solution (the analyte), If 12.75 mL of the titrant is dispensed from a et in causing a color change of the phenolphthalein, what is the molar concentration of the nitric Sin acid solution

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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**Titration of Nitric Acid Solution**

In this experiment, you're tasked with determining the molar concentration of a nitric acid solution. Follow these steps to complete the titration process:

1. **Preparation**:
   - Measure 25.00 mL of a nitric acid solution of unknown concentration.
   - Add this solution to a 125-mL Erlenmeyer flask.

2. **Indicator Addition**:
   - Add 2 drops of phenolphthalein to the nitric acid solution in the flask.

3. **Titration Process**:
   - Use a sodium hydroxide solution with a concentration of 1.50 M as the titrant.
   - Carefully dispense the sodium hydroxide solution from a buret.
   - Continue the process until the phenolphthalein indicator changes color, which indicates the endpoint of the titration.

4. **Volume Measurement**:
   - Record the volume of sodium hydroxide dispensed from the buret. In this experiment, it is 12.75 mL.

5. **Calculations**:
   - Using the volume and concentration of the sodium hydroxide solution, calculate the molar concentration of the nitric acid solution.

This exercise helps in understanding the principles of acid-base titration and stoichiometric calculations necessary to determine unknown concentrations.
Transcribed Image Text:**Titration of Nitric Acid Solution** In this experiment, you're tasked with determining the molar concentration of a nitric acid solution. Follow these steps to complete the titration process: 1. **Preparation**: - Measure 25.00 mL of a nitric acid solution of unknown concentration. - Add this solution to a 125-mL Erlenmeyer flask. 2. **Indicator Addition**: - Add 2 drops of phenolphthalein to the nitric acid solution in the flask. 3. **Titration Process**: - Use a sodium hydroxide solution with a concentration of 1.50 M as the titrant. - Carefully dispense the sodium hydroxide solution from a buret. - Continue the process until the phenolphthalein indicator changes color, which indicates the endpoint of the titration. 4. **Volume Measurement**: - Record the volume of sodium hydroxide dispensed from the buret. In this experiment, it is 12.75 mL. 5. **Calculations**: - Using the volume and concentration of the sodium hydroxide solution, calculate the molar concentration of the nitric acid solution. This exercise helps in understanding the principles of acid-base titration and stoichiometric calculations necessary to determine unknown concentrations.
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