0.1 M Sodium Thiosulphate Solution: Preparation and Uses
What is Sodium Thiosulphate?
Sodium thiosulphate, also known as sodium hyposulphite, is a colorless, crystalline solid with a faint odor of sulphur. It is a versatile chemical compound that has a wide range of applications in various industries, including photography, pharmaceuticals, and analytical chemistry.
Preparation of 0.1 M Sodium Thiosulphate Solution
To prepare a 0.1 M sodium thiosulphate solution, you will need the following materials:
Materials:
- Sodium thiosulphate (Na2S2O3) crystals
- Distilled water
Instruction:
- Calculate the amount of sodium thiosulphate required: To prepare 1 liter of 0.1 M sodium thiosulphate solution, you will need 15.82 grams of sodium thiosulphate crystals.
- Weigh the sodium thiosulphate crystals: Using a balance, accurately weigh out 15.82 grams of sodium thiosulphate crystals.
- Dissolve the crystals in distilled water: Gradually add the weighed sodium thiosulphate crystals to 1 liter of distilled water while stirring until the crystals are completely dissolved.
- Stir and filter: Stir the solution well and filter it through a filter paper or a membrane filter to remove any impurities.
Uses of 0.1 M Sodium Thiosulphate Solution
The 0.1 M sodium thiosulphate solution has several applications in various fields, including:
Analytical Chemistry
- The solution is used as a reducing agent in the analysis of certain metals, such as copper and silver.
- It is used as a titrant in the determination of chlorate ions.
Photography
- Sodium thiosulphate is used as a fixer in photographic processing to remove unexposed silver halides from the film or paper.
Pharmaceuticals
- The solution is used as an antidote for cyanide poisoning.
- It is used as a reducing agent in the manufacture of certain pharmaceuticals.
Conclusion
In conclusion, the 0.1 M sodium thiosulphate solution is a versatile and widely used solution in various industries. Its preparation is simple and straightforward, and its applications are numerous and significant. Whether you are an analytical chemist, a photographer, or a pharmaceutical researcher, the 0.1 M sodium thiosulphate solution is an essential solution to have in your toolkit.
