Sodium bisulphite titration is a chemical analysis technique used to determine the concentration of a substance (usually an oxidizing agent) in a solution. It involves the addition of sodium bisulphite, a reducing agent, to the solution until the reaction is complete. The amount of sodium bisulphite used is then used to calculate the concentration of the oxidizing agent.
The purpose of sodium bisulphite titration is to determine the concentration of an oxidizing agent in a solution. This information can be useful in various industries, such as water treatment, food and beverage production, and pharmaceuticals, as it allows for precise control of the concentration of the oxidizing agent.
The materials needed for sodium bisulphite titration include a burette, a standard solution of sodium bisulphite, an indicator solution (such as starch or iodine), a beaker or flask to hold the solution being titrated, and a volumetric flask to prepare and store the solution being titrated.
The process of sodium bisulphite titration involves adding small increments of the standard sodium bisulphite solution to the solution being titrated, while also adding the indicator solution. The endpoint of the titration is reached when the indicator changes color, indicating that the reaction is complete. The amount of sodium bisulphite used can then be used to calculate the concentration of the oxidizing agent.
Some potential sources of error in sodium bisulphite titration include inaccurate measurement of the solutions, improper mixing or agitation, and variations in the endpoint determination due to differences in color perception. It is important to carefully follow the procedure and use precise measuring equipment to minimize these sources of error.