In iodometry sodium thiosulphate is used because it is standardized by potassium dichromate and it is the best and relaible way to standardized sodium thiosulphate using iodometric titration. Infact sodium thiosulphate is also standardized by iodimetry. The difference between both of them is only of iodine. In iodometry iodine gas is liberated that will further react with sodium thiosulphate but in iodimetry standard solution of iodine is used.
The chemical symbol for sodium thiosulphate (hypo) is Na2S2O3•5H2O.
The chemical symbol for sodium thiosulphate (hypo) is Na2S2O3•5H2O.
Starch acts as an indicator for the endpoint of the reaction between sodium thiosulphate and potassium iodate, as it forms a blue-black complex with iodine. This color change helps identify when all the iodine has been liberated from the reaction. This method is commonly used in titrations to determine the concentration of the sodium thiosulphate solution accurately.
Sodium Thiosulphate is Na2S2O3 and water is H2O.
Sodium thiosulfate is photosensitive, meaning it degrades when exposed to light. Storing it in a brown bottle helps to block out light and prevent this degradation, maintaining the stability and effectiveness of the compound.
because sodium thiosulphate is unstable and iodine also so to maintain neutral medium we have to use sodiumcarboate
Sodium thiosulphate is typically white in color, appearing as a crystalline powder or solid.
Sodium thiosulphate solution (5-25 %)
Starch
The boiling point of sodium thiosulphate is 100 degrees Celsius, the same as water.That would be 212 degrees Fahrenheit.
sodium chloride, sulphur, sulphur dioxide and water
Sodium thiosulfate is not conductive because it does not dissociate into ions in solution. It is a non-electrolyte.
The chemical symbol for sodium thiosulphate (hypo) is Na2S2O3•5H2O.
The chemical symbol for sodium thiosulphate (hypo) is Na2S2O3•5H2O. Hope that helps.
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Starch indicator is added after sodium thiosulphate in iodometric titrations to help visualize the endpoint of the reaction. Starch reacts with any excess iodine produced at the endpoint, forming a dark blue-black color, allowing for easier detection of when all the thiosulphate has reacted.