Question

A solution which is 10-3 M each in Mn+2, Fe+2, Zn+2 and Hg+2 is treated with 10-16 M, sulphide ion. If K. of
Mns, FeS, ZnS and Hgs are 1 x 10-15, 1 x 10-23, 1 x 10-20 and 1 x 10-54 respectively, which one will
precipitate first?
(1) Hgs
(2) ZnS
(3) Fes
(4) MgS
with clear explanation ​

Answer 1

Answer:

HgS

Explanation:

we know that it will ppt out when ionic product will be more than Ksp

HgS

10-19 > 10-54

and in all other Ksp is greater they will dissolve.....

And one last I think u are a FIITJEEian