State the medicinal applications of borax and explain the difference between the equivalence point and the end point in titrimetric determination.

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Pre laboratory question

1. State the medicinal applications of borax.
Borax (sodium tetraborate) has several medicinal applications, primarily due to its antiseptic, antifungal, and mild astringent properties. It has been traditionally used in eyewashes, mouthwashes, and skin washes to treat minor infections and irritations. It can also be found in some pharmaceutical preparations as a buffering agent.

Post laboratory question

1. Explain the difference between the equivalence point and the end point in this titrimetric determination.

• The equivalence point is the theoretical point in a titration where the amount of titrant added is exactly stoichiometrically equivalent to the amount of analyte present in the sample. It is a calculated value based on the balanced chemical equation.
• The end point is the experimentally observed point in a titration where a physical change, typically a color change of an indicator, signals the completion of the reaction. In an ideal titration, the end point should coincide as closely as possible with the equivalence point. The choice of indicator is critical to ensure that its color change occurs at or very near the equivalence point pH, thus minimizing the difference between the two.