Press "Enter" to skip to content

What is the chemical name of Kscn?

What is the chemical name of Kscn?

Potassium thiocyanate

PubChem CID 516872
Molecular Formula KSCN or KCNS or CKNS
Synonyms POTASSIUM THIOCYANATE 333-20-0 potassium rhodanide Potassium rhodanate Rodanca More…
Molecular Weight 97.18 g/mol
Parent Compound CID 781 (Thiocyanic acid)

Is potassium thiocyanate flammable?

General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Substance is noncombustible.

What is the molar mass of Kscn?

97.181 g/mol

Does potassium thiocyanate form a precipitate?

Understanding: The soluble salts form lightly tinted (ferric sulfate) or colorless (potassium thiocyanate) solutions. Mixing the two solutions leads to the dramatic formation of a deeply colored “blood red” precipitate.

Why is Kscn added in iodometric?

The KSCN is added to displace the adsorbed I2 making it accessible to the starch collodial particles, hence yielding a sharper endpoint. The iodine will be titrated with a standardized solution of sodium thiosulfate (Na2S2O3).

What is the end point of cuso4 titration?

The disappearance of the deep blue color is, due to the decomposition of the iodine-starch clathrate, marks the end point. The reducing agent used does not necessarily need to be thiosulfate; stannous chloride, sulfites, sulfides, arsenic(III), and antimony(III) salts are commonly used alternatives at pH above 8.

Why is the thiosulfate solution stored in the dark?

Solutions of thiosulfate are light-sensitive. When exposed to light, they break down into sulfur, sulfite, and sulfate compounds. That is why as much as possible, they must be stored in the dark. This is also the reason why they are stored in amber (dark-colored) bottles.

Why does starch react with iodine?

Amylose in starch is responsible for the formation of a deep blue color in the presence of iodine. The iodine molecule slips inside of the amylose coil. This makes a linear triiodide ion complex with is soluble that slips into the coil of the starch causing an intense blue-black color.