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On addition of the KI to your copper (II) solution, you formed Copper (I) iodine solid and produced the tri-iodide ion. It is the tri-iodide ion that you are titrating with the sodium thiosulfate. The tri-iodine ion is what itercalates into the starch molecules to form the dark blue color you are using as an end point in the titration. Some the the tri-iodide ion formed will adsorb to the surface of the solid copper (I) iodine formed. This must be desorbed for a complete titration. The addition of the potassium thiocyanate, displaces the adsorbed tri-iodine ion, and liberates it for titration.
What else can I help you with?
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.
KSCN plus H2O plus HCl?
When KSCN, water (H2O), and hydrochloric acid (HCl) are mixed, the KSCN can react with HCl to form thiocyanic acid (HSCN). This reaction will release hydrogen cyanide gas (HCN), which is a toxic gas. Therefore, caution should be taken when working with these chemicals to prevent exposure to the toxic gas.
What does nacl hcl kscn reaction gives and what is the color of the product?
The reaction between NaCl, HCl, and KSCN does not directly give any colored products. It typically results in the formation of NaSCN (sodium thiocyanate) and KCl (potassium chloride), with HCl acting as a catalyst. The color of the products is usually white or colorless.
What insoluble base used to make copper sulphate?
Sodium hydroxide is commonly used to make copper sulfate from copper oxide, which is insoluble in water. The reaction between copper oxide and sodium hydroxide forms copper sulfate and water.
What is the balanced equation for FeCl3 and KSCN?
FeCl3 + 6KSCN --> [Fe(SCN)6]-3 + 6K+ + 3Cl- This is a complex ion equation. K has a charge of +1 and Cl has a charge of -1 but since these form an aqueous solution, they are seperated. Put together, the equation cannot be balanced.
Why is ammonium thiocyanate used in iodometry of copper?
Ammonium thiocyanate is used as an indicator in the iodometry of copper because it forms a red complex with copper ions. By adding ammonium thiocyanate to the copper solution, the color change from white to red indicates the end point of the titration, allowing for the determination of copper concentration.
What is the role of copper sulphate in estimation of copper by iodometry?
Copper sulfate is used to keep the copper ions in solution so that they can be titrated accurately. Iodometry involves the use of iodine to oxidize copper ions to cupric ions, which are then titrated with a standardized solution of thiosulfate to determine the amount of copper present. Copper sulfate ensures the copper ions remain in solution throughout the titration process.
What is the name for KSCN?
potassium thiocyanate
Is KSCN a salt?
Yes
Can KSCN break down?
Yes, KSCN can decompose into potassium sulfocyanate, sulfur dioxide, and nitrogen oxides when heated.
What is the name of the ionic compound KSCN?
The name of the ionic compound KSCN is potassium thiocyanate.
What is the name kscn?
potassium thiocyanate
Is liquid KSCN a strong electrolyte?
Yes.. it is solid KSCN melted, so the ions transport the electricity. In the other hand solid KSCN would not transport any electricity.
How do you make 0.1 m consntratefrom KSCN?
10 g KSCN; add distilled water for a total volume of 1 L
What is the pH of KSCN?
The pH of a solution of potassium thiocyanate (KSCN) will depend on the concentration of the solution but will likely be close to neutral (around 7) since KSCN is a salt and will dissociate into its ions in water.
What cation is present with a few drops of KSCN added to water?
If a few drops of KSCN (potassium thiocyanate) are added to water, K+ cations would be present as KSCN dissociates into K+ and SCN- (thiocyanate) ions in water.
What are the indicators in iodometry?
Indicators commonly used in iodometry include starch, which forms a blue-black complex with iodine, and potassium iodide, which reacts with iodine to form a yellow-brown color. These indicators help in detecting the endpoint of the iodometric titration.
