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A solution may contain any of the follo...

A solution may contain any of the following ions: `Fe^(2+),Ni^(2+), Cr^(3+),Zn^(2+),Mn^(2+)` Based on the experiment and result therein , which of the ions would be present? Indicate any wrong infornation if any…..
a. The original solution is treated with with `(NH_(4)),S`(a subestitate is obtain
b. The ppt for (a) dissolves in regain
c. The fitrate after sepration ppt in (a) is treated with `NaOH` and `H_(2)O_(2)` A dark ppt , is separate filtrate is colourless.
e. The solution from (d) is turned with aq `NH_(3)` A dark ppt forms
f. The ppt from (e) is solution in `HCI` (aq) and solution develops an latense red colour when treated with `SCN^(Theta)` (aq)

Text Solution

AI Generated Solution

To solve the problem step by step, we will analyze the given information and the reactions that occur at each stage: ### Step 1: Treatment with Ammonium Sulfide - **Observation**: A precipitate (PPT) is obtained when the original solution is treated with `(NH₄)₂S`. - **Analysis**: Ammonium sulfide can precipitate certain metal sulfides. Among the ions listed, `Ni²⁺` can form nickel sulfide (NiS), which is a black precipitate. Therefore, it is likely that `Ni²⁺` is present. ### Step 2: Dissolving Precipitate in Aqua Regia - **Observation**: The precipitate from Step 1 dissolves in aqua regia. ...
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