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Redox titration using sodium thiosulphate and potassium iodate?
Wiki User
∙ 11y ago
(1) io3- + 5i- + 6h+
®
3i2 + 3h2o
(2) i2 + 2s2o32-
®
2i- + s4o62-
Wiki User
∙ 11y ago
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What are the conclusions of redox titration using sodium thiosulphate?
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Is iodized salt is a mixture of potassium iodide and common salt?
Almost yes, but it may sometimes contain Potassium iodate, Sodium iodate or Sodium iodide in place of Potassium iodide
Why is sodium thiosulphate used in iodometric titration?
· In analytical chemistry, sodium thiosulphate is used for the determination of the strength of a given solution of iodine. · Sodium thiosulphate is preferred in iodometric analysis due to the fact that sodium thiosulphate is oxidized by iodine. It is also used to determine the strength of many oxidizing agents.
How does potassium and sodium thiosulphate turn yellow?
No, it can turn it green.
Why is sulfuric acid added to the dilute bleach and iodide in the conical flask during titration of sodium hypochlorite with sodium thiosulphate?
to acidify the solution
What is the use of Sodium thiosulphate in iodometry?
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.
Why do you use starch to standardise sodium thiosulphate using potassium iodate?
The iodine produced from the KIO3 reacts with the starch to produce the blue black colour used as the indicator
Methods of producing iodized salt?
Iodine is added to salt as potassium (sodium) iodide or potassium (sodium) iodate. An iodine deficiency is a source of thyroide diseases or can lead to idiocy.
What are the conclusions of redox titration using sodium thiosulphate?
I also don't know
Is iodized salt is a mixture of potassium iodide and common salt?
Almost yes, but it may sometimes contain Potassium iodate, Sodium iodate or Sodium iodide in place of Potassium iodide
Why use sodium Bicarbonate for titration of sodium thiosulphate using pottasium dicromate?
because sodium thiosulphate is unstable and iodine also so to maintain neutral medium we have to use sodiumcarboate
Why is sodium thiosulphate used in iodometric titration?
· In analytical chemistry, sodium thiosulphate is used for the determination of the strength of a given solution of iodine. · Sodium thiosulphate is preferred in iodometric analysis due to the fact that sodium thiosulphate is oxidized by iodine. It is also used to determine the strength of many oxidizing agents.
How does potassium and sodium thiosulphate turn yellow?
No, it can turn it green.
Equation between potassium iodate and sodium thiosulphate?
This reaction may be misunderstood as a direct reaction between the thiosulphate and iodate ions , however, in practice an iodide and acid mediated production of iodine from the iodate is used to react with the thiosulphate. A standard reaction used to calibrate a solution of sodium thiosulphate is as follows: Acid and potassium iodide are added to a solution of potassium iodate getting the following reaction: KIO3 + 5KI + 3H2SO4 = 3I2 + 3K2SO4 + 3H2O represented by the following ionic equation: IO3- + 5I- + 6H+ = 3I2 + 3H2O Thiosulpathe is titrated against this solution (effectively against iodine): I2 + 2Na2S2O3 = Na2S4O6 + 2NaI represented by the following ionic equation: I2 + 2S2O32- = S4O62- + 2I- where the dark brown coloured solution of iodine turns pale yellow and finally colourless as the reaction proceeds (starch is used as indicator after the pale yellow transition forming a black solution due to an iodine-starch complex which turns colourless upon further addition of thiosulphate).
What are the different primary standards used in titration?
Different primary standards used in titration are as follows 1. Acids - constant boiling HCl, benzoic acid 2. Base - sodium carbonate, HgO, Borax 3. Oxidizing agent - Potassium Dichromates, Potassium bromate, potassium iodate, iodine 4. Reducing agent - iodine, sodium oxalate, arsenous oxide
What is the chemical equation for the iodization of salts?
Iodine in the iodized salt exist as iodine salts (potassium iodide/iodate or sodium iodide/iodate).These salts are dissolved and dissociated in the organism as NaCl.
Why is sulfuric acid added to the dilute bleach and iodide in the conical flask during titration of sodium hypochlorite with sodium thiosulphate?
to acidify the solution
