Question

write one reaction to show the resemblance in chemical properties between thiocyanate and chloride ions.​

Answer 1

Answer:

Thiocyanate (also known as rhodanide) is the anion [SCN]−. It is the conjugate base of thiocyanic acid. Common derivatives include the colourless salts potassium thiocyanate and sodium thiocyanate. Organic compounds containing the functional group SCN are also called thiocyanates. Mercury(II) thiocyanate was formerly used in pyrotechnics.

Explanation:

Thiocyanate is analogous to the cyanate ion, [OCN]−, wherein oxygen is replaced by sulfur. [SCN]− is one of the pseudohalides, due to the similarity of its reactions to that of halide ions. Thiocyanate used to be known as rhodanide (from a Greek word for rose) because of the red colour of its complexes with iron. Thiocyanate is produced by the reaction of elemental sulfur or thiosulfate with cyanide:

8 CN− + S8 → 8 SCN−

CN− + S

2O2−

3 → SCN− + SO2−

3

Answer 2

Explanation:

Reaction:

Fe(3+) + 3Cl(-1) + K(+1) +SCN(-1) ---> Fe(SCN)(+2) + Cl(-1) + K(+1).

Thiocynate:

• Thiocyanate is produced when cyanide reacts with substances that have S-S bonds in aqueous media.
• By distilling HCN from a mildly acidic solution, cyanide and thiocyanate are separated from one another.
• Thiocyanate is changed into cyanogen chloride and cyanogen bromide by the addition of bromine and chloramine-T, respectively, and is then identified as a polymethine dye by the pyridine-barbituric acid or benzidine-pyridine methods.

Chloride ions:

• The essential electrolyte chloride ion, found in all body fluids and responsible for maintaining acid/base balance.
• Responsible for transmitting nerve impulses, and controlling fluid in and out of cells, is a chlorine anion that makes up the negatively charged portion of some salts, such as sodium and hydrogen chloride salts.

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