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Why potassium thiocyanate is added in redox iodometric titration of copper sulphate?
Cu2I2 is precipitates in light pink colour due to adsorption of I2 and the precipitate releases I2 very slowly. Therefore very small amount of potassium thiocyanate is added towards the end point which helps to displace the adsorbed I2 quickly by combining with Cu2I2 to form CuSCN which has less tendency to adsorb I2.
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Judy
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StevePotassium thiocyanate is added to the redox iodometric titration of copper sulfate to react with the excess iodine produced during the reaction. This reaction forms a stable product, potassium iodide, which helps reach the correct endpoint of the titration by preventing the iodine from reacting with other substances. It also helps improve the accuracy and precision of the titration results.
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Easy Analytical techniques zinc sulphate Ferrous sulphate Copper sulphate through titration method?
For analysis through titration method: Zinc sulfate can be titrated using EDTA as the titrant. Ferrous sulfate can be titrated using potassium permanganate as the titrant. Copper sulfate can be titrated using sodium thiosulfate as the titrant.
What is the mass of 5 moles of Potassium Sulphate?
The molar mass of Potassium Sulphate (K2SO4) is 174.26 g/mol. Therefore, the mass of 5 moles of Potassium Sulphate would be 5 moles x 174.26 g/mol = 871.3 grams.
How can you make a sample of potassium sulphate?
2koh + h2so4 = k2so4 + 2h20
What is the correct number of atoms and elements in Potassium Sulphate?
Potassium sulfate has a chemical formula of K2SO4. Therefore, it contains 7 atoms (2 potassium atoms, 1 sulfur atom, and 4 oxygen atoms) and 3 elements (potassium, sulfur, and oxygen).
What is the word equation when sulphuric acid neutralises potassium hydroxide giving water and a salt called potassium sulphate?
H2SO4 + 2 KOH = K2SO4 + 2 H2O
