How do we differentiate between `Fe^(3+)` and `Cr^(3+)` in group lll?

Question

How do we differentiate between `Fe^(3+)` and `Cr^(3+)` in group lll?

How do we differentiate between `Fe^(3+)` and `Cr^(3+)` in group lll?
A. By taking excess of `NH_(4)OH`
B. By increasing `NH_(4)^(+)` ion concentration
C. By decreasing `OH^(-)` ion concentration
D. Both (B ) and (C )

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - D
In a group III of analysis, addition of `NH_(4)Cl` increases `NH_(4)^(+)` ion concentration produced from `NH_(4)OH` due to common ion effect.

4 views Answered 2023-02-05 15:29