Frequently Asked Question

Neutralization titration in aqueous media is a fundamental technique in chemistry used to determine the concentration of an unknown acid or base solution. It involves reacting a known volume and concentration of a standard solution (titrant) with a measured volume of the unknown solution (analyte) until the reaction reaches the equivalence point. Here's a typical experiment setup and procedure:
Materials:
Burette
Erlenmeyer flask
Beaker
Pipette
Stirring rod
Indicator (e.g., phenolphthalein)
Standard solution of known concentration (titrant)
Unknown solution of unknown concentration (analyte)
Procedure:
1. Preparation: Prepare the standard solution (titrant) with a known concentration. Fill the burette with the standard solution. Pipette a known volume of the unknown solution (analyte) into an Erlenmeyer flask. Add a few drops of indicator to the analyte solution.
2. Titration: Slowly add the titrant from the burette to the analyte solution while constantly swirling the flask. The indicator changes color when the equivalence point is reached.
3. Equivalence Point: The equivalence point is the point where the moles of acid and base are stoichiometrically equal. This is indicated by a distinct color change in the solution.
4. Calculation: Use the volumes of titrant and analyte, and the known concentration of the titrant to calculate the concentration of the unknown solution.
Applications:
Determining the concentration of an unknown acid or base: This is a primary application of neutralization titration.
Monitoring the progress of a chemical reaction: Titration can be used to track the consumption of acid or base in a reaction.
Determining the purity of a substance: Neutralization titration can be used to determine the amount of active ingredient in a sample.
Quality control: This method is essential in many industries to ensure the consistency and quality of products.