A solution of sodium thiosulphate on addition of few drops of ferric chloride gives violet colour due to the formation of

Question

A solution of sodium thiosulphate on addition of few drops of ferric chloride gives violet colour due to the formation of (A)  Na2S4O6  (B)  Fe2(SO4)3  (C)  Fe2(S2O3)3  (D)  Fe2(S2O3)2

Tardigrade Admin · Accepted Answer

When a few drops of FeCl3 solution is added to hypo solution, a violet colour of ferric thiosulphate is obtained 3Na2S2O3 + 2FeCl3 leftharpoons underset textviolet colour Fe2(S2O3)3+6NaCl This colour disappears quickly due to reduction of ferric chloride by thiosulphate 2FeCl3 +2Na2S2O3 → 2FeCl2 + Na2S4O6+2Nacl

Q. A solution of sodium thiosulphate on addition of few drops of ferric chloride gives violet colour due to the formation of

$N a_{2} S_{4} O_{6}$

$F e_{2} (S O_{4})_{3}$

$F e_{2} (S_{2} O_{3})_{3}$

$F e_{2} (S_{2} O_{3})_{2}$

Q. A solution of sodium thiosulphate on addition of few drops of ferric chloride gives violet colour due to the formation of

Na2​S4​O6​

Fe2​(SO4​)3​

Fe2​(S2​O3​)3​

Fe2​(S2​O3​)2​

$N a_{2} S_{4} O_{6}$

$F e_{2} (S O_{4})_{3}$

$F e_{2} (S_{2} O_{3})_{3}$

$F e_{2} (S_{2} O_{3})_{2}$