Determination of Sulfuric Acid Concentration by Titration

Theoretical Background / Context

• Sample is a solution of unknown concentration.
• Standard is a solution of exactly known concentration.

Requirements of titrimetric reactions:

1. The reaction must be simple and expressed by a chemical equation.
2. A single reaction must occur between the sample and titrant.
3. The reaction must be instantaneous (rapid).
4. A suitable standard solution must be available.
5. The end point should be easily detected.

Types of quantitative reactions:

1. Neutralization reactions 
2. H2O formation.

1. Displacement: Formation of weak acid or weak base.

3. Complexometric reactions.
4. Redox reactions (Electron transfer).
5. Preciptimetric reactions.

Principle of Work Assay of Sulphuric Acid

In H2SO4 concentration determination experiment:

• Sulphuric acid  is a strong acid which can be determined directly using a strong base in the presence of any pH indicator to test for sulphuric acid and sulfuric acid concentration measurement.
• This determination of sulfuric acid concentration by titration involves measuring the molarity of concentrated H2SO4 or molarity of concentrated sulphuric acid through accurate sulfuric acid concentration measurement techniques.
• The Sulphuric Acid Purity Test is an analytical procedure used to determine the concentration and purity of sulphuric acid by titration with a standard alkali solution.

H2SO4 +NaOH    Na2SO4 + H2O