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· 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.
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∙ 13y ago
Sodium thiosulfate is used in iodometric titration as a titrant to react with excess iodine after it has reacted with the analyte. This reaction helps determine the amount of iodine that reacted with the analyte, enabling the quantification of the analyte's concentration. Sodium thiosulfate is preferred due to its ability to efficiently reduce iodine to iodide ions in a one-to-one stoichiometry.
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Why use sodium bicarbonate in iodometric titration?
Sodium bicarbonate is used in iodometric titration to react with excess iodine that may be present after the reaction with the analyte. This helps neutralize the solution and prevent any further reactions that could interfere with the titration endpoint. Additionally, sodium bicarbonate helps stabilize the pH of the solution during the titration process.
Why you do not use H2SO4 in iodometric titration?
Using H2SO4 in iodometric titration can lead to the formation of H2O2, which interferes with the reaction. It can also oxidize iodide ions prematurely, affecting the accuracy of the titration. Therefore, a different acid like HCl is typically used in iodometric titration.
What is hypo solution used in chemistry for iodometric titration?
Hypo solution, also known as sodium thiosulfate solution, is commonly used in chemistry for iodometric titrations as a titrant to react with excess iodine after the reaction with the analyte. It is used to neutralize the excess iodine to determine the amount of analyte present in the sample.
Is iodometric titration and redox titration is same?
Iodometric titration is a type of redox titration where iodine is used as the titrant. Redox titration is a broader category that encompasses any titration based on a redox reaction, not necessarily involving iodine. So while iodometric titration is a type of redox titration, not all redox titrations involve iodine.
Why use NaHCO3 for iodometric titration?
Sodium bicarbonate (NaHCO3) is used in iodometric titration as a reaction enhancer to neutralize excess acids that may interfere with the redox reaction between iodine and the analyte being titrated. By maintaining a slightly basic pH, NaHCO3 helps stabilize the iodine solution, ensuring more accurate and reliable results.
Why use sodium bicarbonate in iodometric titration?
Sodium bicarbonate is used in iodometric titration to react with excess iodine that may be present after the reaction with the analyte. This helps neutralize the solution and prevent any further reactions that could interfere with the titration endpoint. Additionally, sodium bicarbonate helps stabilize the pH of the solution during the titration process.
What is the use of Sodium thiosulphate in iodometry?
Sodium thiosulfate is used in iodometry to titrate iodine, which allows for the determination of the concentration of substances that react with iodine. It serves as a reducing agent that reacts with iodine to form iodide ions in a redox reaction. This reaction is commonly used in analytical chemistry to quantify the amount of oxidizing agents present in a solution.
What is hypo solution used in chemistry for iodometric titration?
Hypo solution, also known as sodium thiosulfate solution, is commonly used in chemistry for iodometric titrations as a titrant to react with excess iodine after the reaction with the analyte. It is used to neutralize the excess iodine to determine the amount of analyte present in the sample.
Why you do not use H2SO4 in iodometric titration?
Using H2SO4 in iodometric titration can lead to the formation of H2O2, which interferes with the reaction. It can also oxidize iodide ions prematurely, affecting the accuracy of the titration. Therefore, a different acid like HCl is typically used in iodometric titration.
Is iodometric titration and redox titration is same?
Iodometric titration is a type of redox titration where iodine is used as the titrant. Redox titration is a broader category that encompasses any titration based on a redox reaction, not necessarily involving iodine. So while iodometric titration is a type of redox titration, not all redox titrations involve iodine.
Why KI is added in redox iodometric titration even in the presence of sodium thiosulfate as a reducing agent?
KI is added in redox iodometric titration as an indicator because it reacts with iodine formed during the titration to form a starch-iodine complex, which gives a blue color. This color change helps detect the endpoint of the titration accurately. Sodium thiosulfate is used to titrate the excess iodine after the reaction with the analyte is complete.
Why use NaHCO3 for iodometric titration?
Sodium bicarbonate (NaHCO3) is used in iodometric titration as a reaction enhancer to neutralize excess acids that may interfere with the redox reaction between iodine and the analyte being titrated. By maintaining a slightly basic pH, NaHCO3 helps stabilize the iodine solution, ensuring more accurate and reliable results.
What is iodometric titration?
Iodometric titration is a type of redox titration method used to determine the concentration of oxidizing agents, such as chlorine, chlorine dioxide, and hydrogen peroxide, in a sample. It involves the reaction between the iodide ion and the oxidizing agent, with the endpoint of the titration determined by the presence of excess iodine.
What is the function of potassium iodide in iodometric titration?
Potassium iodide is used in iodometric titration as a source of iodide ions. It reacts with iodine to form triiodide ions, which are then titrated with a standard solution of thiosulfate to determine the concentration of the oxidizing agent.
Is sodium thiosulphate a reactant?
Yes, sodium thiosulfate can be a reactant in chemical reactions, such as in photography as a fixing agent or in medical treatments for cyanide poisoning. It can also be used in measuring the concentration of other substances through titration reactions.
Why sodium thiosulphate is called hypo?
Sodium thiosulfate is called hypo because it was historically used as a photographic fixer, which removed unexposed silver halide from photographic film. The term "hypo" is short for "hypo-sulfite," indicating its chemical composition.
Indicator used during the standardization of sodium thiosulphate?
Starch
