Tests For S2O3²- Flashcards
1
Q
S2O3²- + HCl, give the products and colour of ppt
A
SO2 + S(white)
2
Q
KI- + I2
A
I3‐
3
Q
KI3 + S2O3²-
A
S4O6²- + I‐
4
Q
S2O3²- + AgNO3, write the initial product
A
[Ag(S2O3)2]³-
5
Q
What is the product when the initial product [Ag(S2O3)2]³‐ further reacts with AgNO3?, mention colour of ppt too
A
Ag2S2O3( white ppt)
6
Q
What does Ag2S2O3 further dissociate to form? Also Mention colour of product
A
Ag2S(black)+ SO4²-
7
Q
What is the colour of PbS2O3?
A
Black
8
Q
What does it dissociate to form?( mention colour)
A
PbS(black)+ SO4²‐
9
Q
What does Bi2(S2O3)3 dissociate to form?(mention colour)
A
Bi2S3(black) + SO4²-
10
Q
What is the initial product when FeCl3 is treated with S2O3²-?
A
[Fe(S2O3)2]‐
11
Q
What does it form on further reaction with Fe3+
A
S4O6²-+ Fe2+
