Saved Bookmarks
| 1. |
An aqueous solution contains `Hg^(2+), Hg_2^(2+),Pb^(2+),Ag^(+),Bl^(3+) and Cd^(2+)`.Out of these, how many ions will produce white precipitate with dilute HCl ? |
|
Answer» Correct Answer - 3 `Pb^(2+)+2Cl^(-)toPbCl_2darr(white), Hg_2^(2+)+2Cl^(-)toHg_2Cl_2darr`(white) `Ag^(+)+Cl^(-)toAgCldarr`(white) `K_(sp)` of chlorides of `Pb^(2+)` and `Hg_2^(2+)` is low as compared to `K_(sp)` of `Hg^(2+)` and `Cd^(2+)` . Chloride ion concentration provided by dilute H Cl is just enough to exceed the `K_(sp)` of `PbCl_2` and `Hg_2Cl_2` Thus `Pb^(2+)` and `Hg_2^(2+)` are precipitated as their chlorides |
|